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  • PANGAEA  (219,763)
  • Wiley-Blackwell  (36,113)
  • Frontiers Media SA
  • 2020-2024  (37,020)
  • 2005-2009  (184,578)
  • 1975-1979  (36,750)
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  • 1
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    Sedimentology on cores from the Greenland continental margin off Scoresby Sund (2006)
    PANGAEA
    In:  Supplement to: Stein, Ruediger; Grobe, Hannes; Hubberten, Hans-Wolfgang; Marienfeld, Peter; Nam, Seung-Il (1993): Latest Pleistocene to Holocene changes in glaciomarine sedimentation in Scoresby Sund and along the adjacent East Greenland Continental Maring: preliminary results. Geo-Marine Letters, 13, 9-16, https://doi.org/10.1007/BF01204387
    Details
    Publication Date: 2024-06-26
    Description: High-resolution stable oxygen and carbon isotope analyses and detailed sedimentological and geochemical investigations were performed in order to (i) reconstruct the paleoclimate and paleoceanography of the Greenland Sea associated with late Quaternary glacial-interglacial cycles, and (ii) to link the terrestrial and deep-sea climatic records. The reconstruction of the paleoenvironmental history of the East Greenland margin and the correlation between the terrestrial and deep sea records are major objectives of the ESF-PONAM-Programme (European Science Foundation - Polar North Atlantic Margins). For this study 16 gravity and 2 box cores were recovered along the East Greenland continental margin between 69° N and 72° N on three W-E transects running from the shelf to the deep sea.
    Keywords: ARK-V/3b; ARK-VII/3b; AWI_Paleo; GIK21726-1 PS13/193; Gravity corer (Kiel type); Greenland Sea; Greenland Shelf; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS13 GRÖKORT; PS17; PS17/239; PS1726-1; PS1916-1; Quaternary Environment of the Eurasian North; QUEEN; SL
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 2
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    Oxygen respiration and metabolic enzyme malate dehydrogenase of Euphasia superba in the South Atlantic Ocean (2007)
    PANGAEA
    In:  Supplement to: Pape, Carsten; Teschke, Mathias; Meyer, Bettina (2008): Melatonin and its possible role in mediating seasonal metabolic changes of Antarctic krill, Euphausia superba. Comparative Biochemistry and Physiology - Part A: Molecular & Integrative Physiology, 149(4), 426-434, https://doi.org/10.1016/j.cbpa.2008.02.001
    Details
    Publication Date: 2024-06-26
    Description: Melatonin, the chief secretory product of the vertebrate pineal gland is suspected to be a ubiquitous molecule principally involved in the transduction of photoperiodic information. Besides vertebrates, melatonin has been detected throughout phylogeny in numerous non-vertebrate taxa. In the present study, the occurrence of melatonin in Antarctic krill Euphausia superba and its possible role in mediating seasonal metabolic changes was evaluated. Melatonin was quantified by enzyme linked immunosorbent assay (ELISA) in high performance liquid chromatography (HPLC) purified extracts of eyestalks and hemolymph of krill sampled in the Lazarev Sea during the Antarctic winter and summer. In addition, oxygen uptake rates and the activities of the metabolic enzyme malate dehydrogenase (MDH) were recorded to assess the metabolic status of krill. Validation of melatonin measurements was carried out on the basis of three different extraction methods with parallel determination of melatonin by ELISA in crude extracts and in HPLC purified extracts, and after derivatization of melatonin under alkaline conditions in the presence of hydrogen peroxide. A significantly higher respiration rate and MDH activity was found in summer krill than in winter krill indicating that krill was in a state of reduced metabolic activity during winter. However, neither during winter nor during summer there were detectable melatonin concentrations in the visual system or hemolymph of krill. Based on these results, we question a mediating role of melatonin in the control of seasonal metabolic changes in Antarctic krill in particular and its physiological significance in krill in general.
    Keywords: ANT-XXIII/2; ANT-XXIII/6; AWI_BioOce; Biological Oceanography @ AWI; Polarstern; PS69; PS69/043-2; PS69/046-1; PS69/078-1; PS69/092-1; PS69/474-1; PS69/489-1; PS69/497-1; PS69/506-7; PS69/518-1; PS69/520-1; PS69/534-1; Rectangular midwater trawl; RMT
    Type: Dataset
    Format: application/zip, 14 datasets
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  • 3
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    Fine-silt luminescence dating and mineral composition of sediments from the Arctic Ocean (2007)
    PANGAEA
    In:  Supplement to: Berger, Glenn W (2006): Trans-arctic-ocean tests of fine-silt luminescence sediment dating provide a basis for an additional geochronometer for this region. Quaternary Science Reviews, 25(19-20), 2529-2551, https://doi.org/10.1016/j.quascirev.2005.07.024
    Details
    Publication Date: 2024-06-26
    Description: New geochronometers are needed for sediments of the Arctic Ocean spanning at least the last half million years, largely because oxygen-isotope stratigraphy is relatively ineffective in this ocean, and because other dating techniques require significant assumptions about sedimentation rates. Multi-aliquot luminescence sediment-dating procedures were applied to polymineral, fine-silt samples from 9 core-top and 37 deeper samples from 20 cores representing 19 sites across the Arctic Ocean. Most samples have independent age assignments and other known properties (e.g., % coarse fraction, % carbonate, U-Th isotopes). Thick-source alpha-particle counting indicates that for most regions the contribution of measured unsupported 230Th and 231Pa to calculated dose rates is 〈ca+5–11%. IR-PSL dating of polymineral fine-silt fractions from core-top and near-core-top samples indicates that three sites (mainly from the western Arctic Ocean) have long-bleach inherited ages of only 3–7 kyr, suggesting potential for accurate PSL and TL dating without an inherited correction when older interglacial samples are selected. Samples from a giant gravity core from the western region (Northwind Ridge) yield acceptable long-bleach TL and IR-PSL ages up to 100 kyr. A sample from the eastern region (near Gakkel Ridge) gives a long-bleach age of ca 60 kyr, agreeing with an independent age assignment. Several samples in the 10–40 kyr 14C range from other sites produce large long-bleach age overestimates, indicating the variable effects of ice-rafting and other depositional and bottom-currentreworking (re-suspension) processes during glacial stages. Short-bleach dating tests provide IR-PSL age estimates for core tops that appear to penetrate the 'reworking veil' of inherited ages, and not only suggest a procedure to greatly reduce long-bleach inherited ages but also have implications for the 14C reservoir correction. This study identifies the most promising regions for future luminescence dating, and suggests that for several regions of the Arctic Ocean, interglacial-stage (foram-'rich') sediments from ridge tops are preferred for the fine-grain luminescence dating methods.
    Keywords: 88-BC22; 88-GGC23; 89-BC11; 92-BC17; 94-BC16; 94-BC17; 94-BC19; 94-BC20; 94-BC28; Amundsen Basin; Antarctic Ocean; Arctic Ocean; ARK-IV/3; ARK-VIII/3; BC; Box corer; Gakkel Ridge, Arctic Ocean; GGC; Giant box corer; Giant gravity corer; Giant piston corer; GIK21524-2 PS11/364-2; GIK21533-3 PS11/412; GKG; GPC; Gravity corer (Kiel type); KAL; Kasten corer; Lomonosov Ridge, Arctic Ocean; Morris Jesup Rise; Polarstern; PS11; PS1524-2; PS1533-3; PS19/157; PS19/160; PS19/165; PS19/175; PS19/186; PS19/206; PS19/218; PS19/222; PS19/228; PS19 ARCTIC91; PS2163-2; PS2166-2; PS2170-1; PS2177-1; PS2185-3; PS2195-4; PS2200-2; PS2202-2; PS2206-3; SL; Svalbard
    Type: Dataset
    Format: application/zip, 18 datasets
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  • 4
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    Susceptibility measured on 10 sediment cores from METEOR cruise M16/1 (2008)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Die an Bord von FS METEOR durchgeführten sedimentphysikalischen Analysen des M 16/1 Kernmaterials aus verschiedenen Arealen des Guinea-, Angola-und Brasil-Beckens umfassen im einzelnen folgende Arbeiten: -Messungen der Kompressionswellengeschwindigkeit, -Messungen der elektrischen Leitfahigkeit, -Messungen der magnetischen Suszeptibilitat, -Beprobungen für palao-und gesteinsmagnetische Untersuchungen. Erstmalig wurde auf diesem Fahrtabschnitt eine Methode zur Messung der elektrischen Leitfahigkeit getestet, mit der Zielsetzung ein schnelles und effizientes Verfahren zur Bestimmung von Porositats-und Dichteprofilen der Sedimentkerne zu entwickeln. Abbildung 30 zeigt das Blockschaltbild des MeBaufbaus. Zur Messung an den Halbschalen der geöffneten Kerne in Abstanden von in der Regel 5 cm wurde eine Wenner-Anordnung verwendet. AIs Elektroden dienen vier Platindrähte (ø 0,6 mm), die im Abstand von 4 mm in einen Kunststoffstab (16 x 4 x 100 mm) eingegossen sind; er ist zur besseren Ankopplung im unteren, ins Sediment eingefiihrten Teil auf einen etwa dreieckigen Querschnitt abgeschrägt. Der Strom wird über die beiden äußeren Elektroden eingespeist. AIs Stromquelle dienen ein Funktionsgenerator und ein Stromkonstanter, die einen Rechteck-Wechselstrom von 330 Hz und 400 µA erzeugen. Über die beiden inneren Elektroden wird der Spannungsabfall im Sediment bestimmt. Die wesentlichen Gerätekomponenten sind dabei ein Differentialverstärker, ein phasenempfindlicher Detektor und ein Voltmeter.
    Keywords: Cardno Seamount; East Brazil Basin; GeoB; GeoB1405-6; GeoB1407-5; GeoB1408-2; GeoB1412-1; GeoB1413-4; GeoB1414-1; GeoB1415-2; GeoB1417-1; GeoB1419-2; GeoB1420-2; Geosciences, University of Bremen; Gravity corer (Kiel type); M16/1; Meteor (1986); Mid Atlantic Ridge; Northern Guinea Basin; SL; Southwest Guinea Basin; West Angola Basin
    Type: Dataset
    Format: application/zip, 10 datasets
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  • 5
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    Chemical composition of East Pacific Rise basal sediments (1976)
    PANGAEA
    In:  Department of Earth Science and Engineering, Imperial College London | Supplement to: Cronan, David S (1976): Basal metalliferous sediments from the eastern Pacific. Geological Society of America Bulletin, 87(6), 928-934, https://doi.org/10.1130/0016-7606(1976)87%3C928:BMSFTE%3E2.0.CO;2
    Details
    Publication Date: 2024-06-26
    Description: Analyses by atomic absorption spectrophotometry and spark-source mass spectrography of 25 basal metalliferous sediment units from widely spaced locations on the western flank of the East Pacific Rise show that the deposits are enriched relative to normal pelagic sediment in Fe, Mn, Ni, Cu, Pb, Zn, and many trace elements. The elements are partitioned differently between the various mineralogic constituents of the sediment, with Fe and Mn largely in separate phases and many of the remaining elements primarily associated with reducible ferromanganese oxide minerals but also with iron minerals and other phases. Most of the iron in the deposits is probably of volcanic origin, and much of the manganese and minor elements is derived from sea water. The bulk composition of the deposits varies with age; this is thought to be due to variations in the incidence of volcanic activity at the East Pacific Rise crest where the deposits were formed.
    Keywords: 16-162; 5-37; 5-38; 5-39; 7-66; 8-74; 8-75; 9-77B; 9-78; 9-80; 9-82; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg16; Leg5; Leg7; Leg8; Leg9; North Pacific/BASIN; North Pacific/CONT RISE; North Pacific/HILL; South Pacific/BASIN; South Pacific/CONT RISE; South Pacific/VALLEY
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 6
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    Stable oxygen isotope ratios and grain size analyses of sediment cores from the Propeller Mound, Northeast Atlantic (2005)
    PANGAEA
    In:  Supplement to: Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf-Christian; Freiwald, André (2005): Growth and Erosion of a Cold-Water Coral Covered Carbonate Mound in the Northeast Atlantic during the Late Pleistocene and Holocene. Earth and Planetary Science Letters, 233(1-2), 33-44, https://doi.org/10.1016/j.epsl.2005.01.035
    Details
    Publication Date: 2024-06-26
    Description: The first detailed stratigraphic record from a deep-water carbonate mound in the Northeast Atlantic based on absolute datings (U/Th and AMS 14C) and stable oxygen isotope records reveals that its top sediment sequences are condensed by numerous hiatuses. According to stable isotope data, mainly sediments with an intermediate signal are preserved on the mound, while almost all fully glacial and interglacial sediments have either not been deposited or have been eroded later. The resulting hiatuses reduce the Late Pleistocene sediment accumulation at Propeller Mound to amounts smaller than the background sedimentation. The hiatuses most likely result due to the sweeping of the mound in turn with the re-establishment of vigour interglacial circulation patterns after sluggish current regimes during glacials. Thus, within the discussion if internal, fluid-driven or external environmentally driven processes control the evolution of such carbonate mounds, our findings for Propeller Mound clearly point to environmental forcing as the dominant mechanism shaping deep-water carbonate mounds in the NE Atlantic during the Late Pleistocene and Holocene.
    Keywords: Center for Marine Environmental Sciences; ECOMOUND; Environmental controls on mound formation along the european margin; GeoB6718-2; GeoB6728-1; GeoB6729-1; GeoB6730-1; Gravity corer (Kiel type); MARUM; Porcupine Seabight; POS265; POS478-2; POS488-1; POS489-1; POS490-1; Poseidon; SL
    Type: Dataset
    Format: application/zip, 7 datasets
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  • 7
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    Oxygen, hydrogen, and carbon isotopic compositions in deep sea cherts, porcellanites, and coexisting carbonates from DSDP Legs 2, 3, 6, 7, 11, 14, 16, 17, and 20 (1976)
    PANGAEA
    In:  Supplement to: Kolodny, Yehoshua; Epstein, Samuel (1976): Stable isotope geochemistry of deep sea cherts. Geochimica et Cosmochimica Acta, 40(10), 1195-1209, https://doi.org/10.1016/0016-7037(76)90155-1
    Details
    Publication Date: 2024-06-26
    Description: Seventy four samples of DSDP recovered cherts of Jurassic to Miocene age from varying locations, and 27 samples of on-land exposed cherts were analyzed for the isotopic composition of their oxygen and hydrogen. These studies were accompanied by mineralogical analyses and some isotopic analyses of the coexisting carbonates. d18O of chert ranges between 27 and 39%. relative to SMOW, d18O of porcellanite - between 30 and 42%. The consistent enrichment of opal-CT in porcellanites in 18O with respect to coexisting microcrystalline quartz in chert is probably a reflection of a different temperature (depth) of diagenesis of the two phases. d18O of deep sea cherts generally decrease with increasing age, indicating an overall cpoling of the ocean bottom during the last 150 m.y. A comparison of this trend with that recorded by benthonic foraminifera (Douglas and Savin, 1975; http://www.deepseadrilling.org/32/volume/dsdp32_15.pdf) indicates the possibility of d18O in deep sea cherts not being frozen in until several tens of millions of years after deposition. Cherts of any Age show a spread of d18O values, increasing diagenesis being reflected in a lowering of d18O. Drusy quartz has the lowest d18O values. On-land exposed cherts are consistently depleted in 18O in comparison to their deep sea time equivalent cherts. Water extracted from deep sea cherts ranges between 0.5 and 1.4 wt %. dD of this water ranges between -78 and -95%. and is not a function of d18O of the cherts (or the temperature of their formation).
    Keywords: 11-100; 11-99A; 14-138; 14-140; 16-157; 16-158; 16-163; 17-164; 17-165A; 17-166; 17-167; 17-169; 17-171; 20-195; 20-195B; 20-196; 2-12B; 3-13A; 6-49; 6-50; 6-52; 7-62; 7-65; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg11; Leg14; Leg16; Leg17; Leg2; Leg20; Leg3; Leg6; Leg7; North Atlantic/BASIN; North Atlantic/CHANNEL; North Atlantic/CONT RISE; North Pacific; North Pacific/ABYSSAL FLOOR; North Pacific/BASIN; North Pacific/CONT RISE; North Pacific/GUYOT; North Pacific/PLAIN; North Pacific/RIDGE; South Pacific/RIDGE
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 8
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    Neodymium isotopes in benthic foraminifera from the South Atlantic (2008)
    PANGAEA
    In:  Supplement to: Klevenz, Verena; Vance, Derek; Schmidt, Daniela N; Mezger, Klaus (2008): Neodymium isotopes in benthic foraminifera: Core-top systematics and a down-core record from the Neogene south Atlantic. Earth and Planetary Science Letters, 265(3-4), 571-587, https://doi.org/10.1016/j.epsl.2007.10.053
    Details
    Publication Date: 2024-06-26
    Description: Records of the past neodymium (Nd) isotope composition of the deep ocean can resolve ambiguities in the interpretation of other tracers. We present the first Nd isotope data for sedimentary benthic foraminifera. Comparison of the epsilon-Nd of core-top foraminifera from a depth transect on the Cape Basin side of the Walvis Ridge to published seawater data, and to the modern dissolved SiO2- epsilon-Nd trend of the deep Atlantic, suggests that benthic foraminifera represent a reliable archive of the deep water Nd isotope composition. Neodymium isotope values of benthic foraminifera from ODP Site 1264A (Angola Basin side of the Walvis Ridge) from the last 8 Ma agree with Fe-Mn oxide coatings from the same samples and are also broadly consistent with existing fish teeth data for the deep South Atlantic, yielding confidence in the preservation of the marine Nd isotope signal in all these archives. The marine origin of the Nd in the coatings is confirmed by their marine Sr isotope values. These important results allow application of the technique to down-core samples. The new epsilon-Nd datasets, along with ancillary Cd/Ca and Nd/Ca ratios from the same foraminiferal samples, are interpreted in the context of debates on the Neogene history of North Atlantic Deep Water (NADW) export to the South Atlantic. In general, the epsilon-Nd and delta13C records are closely correlated over the past 4.5 Ma. The Nd isotope data suggest strong NADW export from 8 to 5 Ma, consistent with one interpretation of published delta13C gradients. Where the epsilon-Nd record differs from the nutrient-based records, changes in the pre-formed delta13C or Cd/Ca of southern-derived deep water might account for the difference. Maximum NADW-export for the entire record is suggested by all proxies at 3.5-4 Ma. Chemical conditions from 3 to 1 Ma are totally different, showing, on average, the lowest NADW export of the record. Modern-day values again imply NADW export that is about as strong as at any stage over the past 8 Ma.
    Keywords: 208-1264A; Cape Basin; DRILL; Drilling/drill rig; GeoB1204-3; GeoB1206-1; GeoB1207-2; GeoB1208-1; GeoB1209-1; GeoB1210-3; GeoB1212-2; GeoB1213-2; Giant box corer; GKG; Joides Resolution; Leg208; M12/1; Meteor (1986); Ocean Drilling Program; ODP; Walvis Ridge; Walvis Ridge, Southeast Atlantic Ocean
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 9
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    Meiobenthos investigations in the Black Sea during Poseidon cruise POS317/3 (2007)
    PANGAEA
    In:  Supplement to: Sergeeva, Nelly G; Gulin, Maksim (2007): Meiobenthos from an active methane seepage area in the NW Black Sea. Marine Ecology, 28(1), 152-159, https://doi.org/10.1111/j.1439-0485.2006.00143.x
    Details
    Publication Date: 2024-06-26
    Description: Meiobenthos densities and higher taxon composition were studied in an active gas seepage area at depths from 182 to 252 m in the submarine Dnieper Canyon located in the northwestern part of the Black Sea. The meiobenthos was represented by Ciliata, Foraminifera, Nematoda, Polychaeta, Bivalvia, Gastropoda, Amphipoda, and Acarina. Also present in the sediment samples were juvenile stages of Copepoda and Cladocera which may be of planktonic origin. Nematoda and Foraminifera were the dominant groups. The abundance of the meiobenthos varied between 2397 and 52593 Ind./m**2. Maximum densities of Nematoda and Foraminifera were recorded in the upper sediment layer of a permanent H2S zone at depths from 220 to 250 m. This dense concentration of meiobenthos was found in an area where intense methane seeps were covered by methane-oxidizing microbial mats. Results suggest that methane and its microbial oxidation products are the factors responsible for the presence of a highly sulfidic and biologically productive zone characterized by specially adapted benthic groups. At the same time, an inverse correlation was found between meiofauna densities and methane concentrations in the uppermost sediment layers. The hypothesis is that the concentration of Nematoda and Foraminifera within the areas enriched with methane is an ecological compromise between the food requirements of these organisms and their adaptations to the toxic H2S.
    Keywords: GC; Gravity corer; HERMES; Hotspot Ecosystem Research on the Margins of European Seas; MUC; MultiCorer; P14; P4; P5; P6; P7; P8; P9; POS317/3; POS317/3_790MUC; POS317/3_796GC; POS317/3_802MUC; POS317/3_803MUC; POS317/3_804MUC; POS317/3_805MUC; POS317/3_815MUC; POS317/3_827MUC; Poseidon; Western Black Sea
    Type: Dataset
    Format: application/zip, 8 datasets
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  • 10
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    Sea-surface temperature and sea ice distribution of the Southern Ocean at the EPILOG Last Glacial Maximum (2005)
    PANGAEA
    In:  Supplement to: Gersonde, Rainer; Crosta, Xavier; Abelmann, Andrea; Armand, Leanne K (2005): Sea-surface temperature and sea ice distribution of the Southern Ocean at the EPILOG Last Glacial Maximum: A circum-Antarctic view based on siliceous microfossil records. Quaternary Science Reviews, 24(7-9), 869-896, https://doi.org/10.1016/j.quascirev.2004.07.015
    Details
    Publication Date: 2024-06-26
    Description: Based on the quantitative study of diatoms and radiolarians, summer sea-surface temperature (SSST) and sea ice distribution were estimated from 122 sediment core localities in the Atlantic, Indian and Pacific sectors of the Southern Ocean to reconstruct the last glacial environment at the EPILOG (19.5-16.0 ka or 23 000-19 000 cal yr. B.P.) time-slice. The statistical methods applied include the Imbrie and Kipp Method, the Modern Analog Technique and the General Additive Model. Summer SSTs reveal greater surface-water cooling than reconstructed by CLIMAP (Geol. Soc. Am. Map Chart. Ser. MC-36 (1981) 1), reaching a maximum (4-5 °C) in the present Subantarctic Zone of the Atlantic and Indian sector. The reconstruction of maximum winter sea ice (WSI) extent is in accordance with CLIMAP, showing an expansion of the WSI field by around 100% compared to the present. Although only limited information is available, the data clearly show that CLIMAP strongly overestimated the glacial summer sea ice extent. As a result of the northward expansion of Antarctic cold waters by 5-10° in latitude and a relatively small displacement of the Subtropical Front, thermal gradients were steepened during the last glacial in the northern zone of the Southern Ocean. Such reconstruction may, however, be inapposite for the Pacific sector. The few data available indicate reduced cooling in the southern Pacific and give suggestion for a non-uniform cooling of the glacial Southern Ocean.
    Keywords: Agulhas Basin; Agulhas Ridge; ANT-IV/4; ANT-IX/4; ANT-VI/3; ANT-VIII/3; ANT-X/5; ANT-XI/2; ANT-XI/4; ANT-XIV/3; Argentine Islands; Atlantic Indik Ridge; Atlantic Ridge; Gravity corer (Kiel type); KL; MARGO; Meteor Rise; Multiproxy Approach for the Reconstruction of the Glacial Ocean surface; Piston corer (BGR type); Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; PS08; PS08/504; PS08/533; PS12; PS12/551; PS1433-1; PS1444-1; PS16; PS16/284; PS16/311; PS16/345; PS16/351; PS16/366; PS1651-1; PS1756-5; PS1768-8; PS1778-5; PS1779-2; PS1783-5; PS18; PS18/238; PS18/247; PS18/262; PS2082-1; PS2089-1; PS2104-2; PS22/678; PS22/751; PS22 06AQANTX_5; PS2250-5; PS2271-5; PS2491-3; PS2492-2; PS2493-1; PS2498-1; PS2567-2; PS28; PS28/264; PS28/277; PS28/280; PS28/304; PS2821-1; PS30; PS30/097; PS43; PS43/057; Shona Ridge; SL; South Atlantic; South Atlantic Ocean; South Sandwich Islands; SPP1158; Weddell Sea
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 11
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    Sedimentology and stable oxygen isotope ratios of foraminifera from cores of the Porcupine Seabight, Northeast Atlantic (2005)
    PANGAEA
    In:  Supplement to: Rüggeberg, Andres; Dorschel, Boris; Dullo, Wolf-Christian; Hebbeln, Dierk (2005): Sedimentary patterns in the vicinity of a carbonate mound in the Hovland Mound Province, northern Porcupine Seabight. In: Freiwald, A & Roberts, JM (eds.), 2005, Cold-water Corals and Ecosystems, Springer-Verlag, Berlin, Heidelberg, Part I, 87-112, https://doi.org/10.1007/3-540-27673-4_5
    Details
    Publication Date: 2024-06-26
    Description: Large carbonate mound structures have been discovered in the northern Porcupine Seabight (Northeast Atlantic) at depths between 600 and 1000 m. These mounds are associated with the growth of deep-sea corals Lophelia pertusa and Madrepra oculata. In this study, three sediment cores have been analysed. They are from locations close to Propeller Mound, a 150 m high ridge-like feature covered with a cold-water coral ecosystem at its upper flanks. The investigations are concentrated on grain-size analyses, carbon measurements and on the visual description of the cores and computer tomographic images, to evaluate sediment content and structure. The cores portray the depositional history of the past ~31 kyr BP, mainly controlled by sea-level fluctuations and the climate regime with the advance and retreat of the Irish Ice Sheet onto the Irish Mainland Shelf. A first advance of glaciers is indicated by a turbiditic release slightly older than 31 kyr BP, coherent with Heinrich event 3 deposition. During Late Marine Isotope Stage 3 (MIS 3) and MIS 2 shelf erosion prevailed with abundant gravity flows and turbidity currents. A change from glaciomarine to hemipelagic contourite sedimentation during the onset of the Holocene indicates the establishment of the strong, present-day hydrodynamic regime at intermediate depths. The general decrease in accumulation of sediments with decreasing distance towards Propeller Mound suggests that currents (turbidity currents, gravity flows, bottom currents) had a generally stronger impact on the sediment accumulation at the mound base for the past ~31 kyr BP, respectively.
    Keywords: Center for Marine Environmental Sciences; ECOMOUND; Environmental controls on mound formation along the european margin; GeoB6718-1; GeoB6719-1; GeoB6725-1; GeoB6727-2; Giant box corer; GKG; Gravity corer (Kiel type); MARUM; Porcupine Seabight; POS265; POS478-1; POS479-1; POS485-1; POS487-2; Poseidon; SL
    Type: Dataset
    Format: application/zip, 7 datasets
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  • 12
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    Carbonate sedimentology of the Propeller Mound, Northeast Atlantic (2007)
    PANGAEA
    In:  Supplement to: Dorschel, Boris; Hebbeln, Dierk; Rüggeberg, Andres; Dullo, Wolf-Christian (2007): Carbonate budget of a cold-water coral carbonate mound: Propeller Mound, Porcupine Seabight. International Journal of Earth Sciences, 96(1), 73-83, https://doi.org/10.1007/s00531-005-0493-0
    Details
    Publication Date: 2024-06-26
    Description: High resolution studies from the Propeller Mound, a cold-water coral carbonate mound in the NE Atlantic, show that this mound consists of 〉50% carbonate justifying the name "carbonate mound". Through the last ~300,000 years approximately one third of the carbonate has been contributed by cold-water corals, namely Lophelia pertusa and Madrepora oculata. This coral bound contribution to the carbonate budget of Propeller Mound is probably accompanied by an unknown portion of sediments buffered from suspension by the corals. However, extended hiatuses in Propeller Mound sequences only allow the calculation of a net carbonate accumulation. Thus, net carbonate accumulation for the last 175 kyr accounts for only 〈0.3 g/cm2/kyr, which is even less than for the off-mound sediments. These data imply that Propeller Mound faces burial by hemipelagic sediments as has happened to numerous buried carbonate mounds found slightly to the north of the investigated area.
    Keywords: Center for Marine Environmental Sciences; ECOMOUND; Environmental controls on mound formation along the european margin; GeoB6718-2; GeoB6719-1; GeoB6725-1; GeoB6728-1; GeoB6729-1; GeoB6730-1; Gravity corer (Kiel type); MARUM; Porcupine Seabight; POS265; POS478-2; POS479-1; POS485-1; POS488-1; POS489-1; POS490-1; Poseidon; SL
    Type: Dataset
    Format: application/zip, 16 datasets
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  • 13
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    Unknown
    Global data compilation of benthic data sets II (2005)
    PANGAEA
    In:  Supplement to: Seiter, Katherina; Hensen, Christian; Zabel, Matthias (2005): Benthic carbon mineralization on a global scale. Global Biogeochemical Cycles, 19, GB1010, https://doi.org/10.1029/2004GB002225
    Details
    Publication Date: 2024-06-26
    Description: In this study we present a global distribution pattern and budget of the minimum flux of particulate organic carbon to the sea floor (J POC alpha). The estimations are based on regionally specific correlations between the diffusive oxygen flux across the sediment-water interface, the total organic carbon content in surface sediments, and the oxygen concentration in bottom waters. For this, we modified the principal equation of Cai and Reimers [1995] as a basic monod reaction rate, applied within 11 regions where in situ measurements of diffusive oxygen uptake exist. By application of the resulting transfer functions to other regions with similar sedimentary conditions and areal interpolation, we calculated a minimum global budget of particulate organic carbon that actually reaches the sea floor of ~0.5 GtC yr**-1 (〉1000 m water depth (wd)), whereas approximately 0.002-0.12 GtC yr**-1 is buried in the sediments (0.01-0.4% of surface primary production). Despite the fact that our global budget is in good agreement with previous studies, we found conspicuous differences among the distribution patterns of primary production, calculations based on particle trap collections of the POC flux, and J POC alpha of this study. These deviations, especially located at the southeastern and southwestern Atlantic Ocean, the Greenland and Norwegian Sea and the entire equatorial Pacific Ocean, strongly indicate a considerable influence of lateral particle transport on the vertical link between surface waters and underlying sediments. This observation is supported by sediment trap data. Furthermore, local differences in the availability and quality of the organic matter as well as different transport mechanisms through the water column are discussed.
    Keywords: 0021PG; 0026PG; 0029PG; 0032PG; 0036PG; 0038PG; 0044PG; 0050PG; 0055PG; 0058PG; 0066PG; 0071PG; 0075PG; 0091PG; 104-642B; 104-643A; 104-644A; 105-646A; 108-663A; 10BC35-2; 10GC1; 11.5BC46-2; 112-688; 117-723; 11B; 11BC39; 11TW1; 12BC47-2; 13B; 151-908A; 151-909A; 159-959C; 15B; 167-1011; 167-1020; 167-1021; 175-1077B; 1BC1-2; 21B; 22B; 26B; 28B; 2B; 2BC5-1; 3BC8-1; 4B; 4BC14-2; 5B; 6B; 6BC20-2; 75-532_Site; 7BC26-1; 8B; 8BC27-3; A150/180; A180-74; A210709-0131PG; A4/3_287; A4/3_296; ADS; AG-1994; AG94/08; AG94/60; AG94/64; Agulhas Basin; Akademik Golitsyn; also published as VM28-122; Amazon Fan; Amerasian Basin; Angola Basin; Antarctic Ocean; ANT-IV/1c; ANT-IX/4; ANT-VIII/3; ANT-X/5; ANT-XI/2; APSARA2; APSARA4; Arabian Sea; Arctic Ocean; ARK-I/3; ARK-II/5; ARK-III/3; ARK-IV/3; ARK-IX/4; ARK-VI/2; ARK-VII/1; ARK-VIII/2; ARK-VIII/3; ARK-XI/1; Atlantic Ocean; Barents Sea; BC; BC713; BCR; Bear Island Fan; Benguela Current, South Atlantic Ocean; BIOTRANS; BNTH-3-CBC; BNTH-3-SBC; Box corer; Box corer (Reineck); Brazil Basin; BT4; CALYPSO; Calypso Corer; Cap_Verde_AP; Cape Basin; Cardno Seamount; CD92A; CD92A_N1500; CD92A_N2000; CD92A_R1000; CD92A_S700; Center for Marine Environmental Sciences; CEPAG; CH182-36; CH73-013; CH75-03; CH75-04; CH7X; Charles Darwin; COMPCORE; Composite Core; CONDOR-Ia; Congo Fan; DOS1; DOS2; DRILL; Drilling/drill rig; East Atlantic; Eastern Equatorial Pacific; eastern Romanche Fracture Zone; EN06601; EN066-21PG; EN066-24PG; EN066-26PG; EN066-29PG; EN066-32PG; EN066-34PG; EN066-36PG; EN066-38PG; EN066-39GGC; EN066-44PG; EN066-45PG; EN066-47PG; EN066-51PG; Endeavor; Equatorial Atlantic; ERDC; ERDC-077BX; ERDC-079BX; ERDC-083BX; ERDC-092BX; ERDC-108BX; ERDC-112BX; ERDC-120BX; ERDC-123BX; ERDC-125BX; ERDC-128BX; ERDC-129BX; ERDC-131BX; ERDC-135BX; ERDC-136BX; ERDC-139BX; ERDC-141BX; EW9209-1JPC; EW9504-17PC; FA-527-3; FGGE-Equator 79 - First GARP Global Experiment; FL-124; Fram Strait; G-255; GC; GeoB1008-3; GeoB1028-5; GeoB1113-4; GeoB1117-2; GeoB1118-3; GeoB1209-2; GeoB1401-4; GeoB1408-2; GeoB1515-1; GeoB1523-1; GeoB1706-2; GeoB1707-1; GeoB1711; GeoB1711-4; GeoB1719-7; GeoB1720-2; GeoB1721-7; GeoB1722-1; GeoB2202-4; GeoB2810-2; GeoB2811-1; GeoB2812-3; GeoB3302-1; GeoB3606-1; GeoB3718-10; GeoB3720-3; GeoB3722-2; GEOTROPEX 83, NOAMP I; Giant box corer; GIK10127-2; GIK10132-1; GIK10140-1; GIK10141-1; GIK10145-1; GIK10147-1; GIK10175-1; GIK12310-3; GIK12327-4; GIK12328-4; GIK12329-4; GIK12336-1; GIK12337-4; GIK12344-3; GIK12345-4; GIK12347-1; GIK12392-1; GIK13519-1; GIK13521-1; GIK15612-2; GIK16067; GIK16365-1; GIK16408-2; GIK16415-1; GIK16453-2; GIK16455-1; GIK16457-1; GIK16458-2; GIK16459-1; GIK16771-2; GIK16772-1; GIK16773-1; GIK16856-2; GIK16867-1; GIK17728-1; GIK21294-4 PS07/584; GIK21295-4 PS07/586; GIK21295-5 PS07/586; GIK21297-4 PS07/588; GIK21311-4 PS07/605; GIK21320-2 PS07/620; GIK21533-3 PS11/412; GIK21745-5 PS15/054-5; GIK21906-1 PS17/081; GIK21906-2 PS17/081; GIK21911-1 PS17/086; GIK23062-1; GIK23065-2; GIK23068-3; GIK23071-2; GIK23199-1 PS03/199; GIK23243-1 PS05/431; GIK23244-2 PS05/449; GIK23245-1 PS05/450; GIK23256-1; GIK23259-2; GIK23341-1; GIK23342-3; GIK23352-2; GIK23400-3; GIK23411-5; GIK23414-6; GIK23414-7; GIK23414-9; GIK23424-3; GKG; Glomar Challenger; Goban_Spur; Gravity corer; Gravity corer (Kiel type); Greenland Sea; Gulf of Guinea; H-238; HU91-045-090; Iceland Sea; IMAGES I; INMD; INMD-097BX; INMD-101BX; INMD-104BX; INMD-109BX; INMD-110BX; INMD-111BX; INMD-113BX; INMD-115BX; Island_Becken; J-208; Jean Charcot; Joides Resolution; K-218; K51_D; K51_E; K51_F; K51_G; K51_H; K51_I; K51_J; K51_K; K51_L; K51_M; K708-007; K90_I(2); KAL; KAL15; Kasten corer; Kasten corer 15 cm; KL; KN11002; KN11002-0043; Knorr; KNR110-50; KNR110-55; KNR110-58; KNR110-66; KNR110-71; KNR110-75; KNR110-91; KOL; Labrador Sea; Laptev Sea; Laptev Sea, Taymyr Island; Leg104; Leg105; Leg108; Leg112; Leg117; Leg151; Leg159; Leg167; Leg175; Leg75; Le Suroît; LGC02; LGC05; Lofoten; M12/1; M12392-1; M13/2; M13/2_543; M13/2_547; M13/2_562; M13/2_576; M13/2_586; M13/2_593; M13/2_596; M13/2_598; M16/1; M16/2; M17/1; M17/2; M17/2_533; M17/2_538; M17/2_541; M17/2_548; M17/2_551; M17/2_554; M2/1; M2/1_66; M2/1_91; M2/2; M2/2_103; M2/2_108; M2/2_111; M2/2_114; M2/2_117; M20/2; M21/4; M23/3; M-231; M23414; M25; M26/2; M26/2_D2; M26/2_E2; M26/2_L1; M29/2; M34/1; M34/2; M39; M51; M57; M6/5; M6/6; M65; M7/2; M7/3; M7/3_400; M7/3_402; M7/3_413; M7/3_415; M7/3_431; M7/3_434; M7/3_437; M7/3_439; M7/3_444; M7/3_448; M7/3_449; M7/3_450; M7/3_452; M7/3_460; M7/5; M7/5_549; M7/5_552; M7/5_554; M7/5_556; M7/5_564; M7/5_568; M7/5_574; M7/5_576; M7/5_579; M9/4; MANOP; Marion Dufresne (1972); Marion Dufresne (1995); MARUM; MD101; MD38; MD84-551; MD88-770; MD952011; MD95-2011; MD952012; MD95-2012; MD952039; MD95-2039; Melville; Meteor (1964); Meteor (1986); Meteor Rise; MIC; MiniCorer; MM; MUC; MULT; MultiCorer; Multiple investigations; Namibia continental slope; New Horizon; NIOP-D2; NIOP-D2_451; NIOP-D2_452; NIOP-D2_453; NIOP-D2_454; NIOP-D2_455; NIOP-D2_463; NIOP-D2_464; NIOP-D2_466; NIOZ78; NIOZ80; NN; North Atlantic; Northeast Atlantic; Northern Cape Basin; North Greenland Sea; North Pacific/Gulf of California/SLOPE; North Pacific Ocean; Norwegian-Greenland Sea; Norwegian Sea; off Gabun; off Nigeria; PACFLUX-I_PFSC-1; Pacific; PC; Piston corer; Piston corer (BGR type); Piston corer (Kiel type); PLDS-066BX; PLDS-068BX; PLDS-070BX; PLDS-072BX; PLDS-074BX; PLDS-077BX; PLDS-079BX; PLDS-081BX; PLDS-083BX; PLDS-085BX; PLDS-089BX; PLDS-090BX; PLDS-092BX; PLDS-107BX; PLDS-3; Pleiades; PLTO; PLTO-003HBC; PLTO-003MBC; PO142A; Polarstern; Porcupine_AP; Porto Seamount; POS137; POS137_186; POS142; POS142_1184; Poseidon; PS03; PS05; PS07; PS08; PS11; PS1113-1; PS1243-1; PS1244-2; PS1245-1; PS1294-4; PS1295-4; PS1295-5; PS1297-4; PS1311-4; PS1320-2; PS15; PS1533-3; PS16; PS16/278; PS16/284; PS16/311; PS17; PS1745-5; PS1754-1; PS1754-2; PS1756-6; PS1768-1; PS1768-8; PS18; PS18/238; PS19/091; PS19/094; PS19/100; PS19/111; PS19/112; PS19/113; PS19/114; PS19/117; PS19/150; PS19/245; PS19/246; PS19/249; PS19/252; PS1906-1; PS1906-2; PS1911-1; PS19 ARCTIC91; PS19 EPOS II; PS2082-1; PS2125-1; PS2127-1; PS2129-2; PS2137-1; PS2138-1; PS2139-1; PS2140-1; PS2143-1; PS2157-3; PS22/814; PS22/817; PS22/818; PS22/826; PS22 06AQANTX_5; PS2212-6; PS2213-4; PS2214-1; PS2215-1; PS2316-4; PS2319-1; PS2320-3; PS2328-4; PS2446-2; PS2446-4; PS2447-3; PS2448-3; PS2453-2; PS2455-2; PS2456-1; PS2458-2; PS2459-1; PS2460-2; PS2462-2; PS2480-2; PS2515-3; PS27; PS27/020; PS27/024; PS27/025; PS27/031; PS27/033; PS27/034; PS27/038; PS27/039; PS27/040; PS27/043; PS27/067; PS2723-4; PS2731-6; PS2732-5; PS2733-5; PS2734-4; PS2735-5; PS2736-5; PS2737-4; PS2747-7; PS2748-2; PS2749-3; PS2750-6; PS2752-8; PS2753-1; PS2755-5; PS2756-6; PS2757-6; PS2758-2; PS2759-7; PS2760-5; PS2761-8; PS2762-4; PS2763-8; PS2764-7; PS2765-6; PS2767-6; PS2768-3; PS2770-6; PS2771-5; PS28; PS28/378; PS36; PS36/007; PS36/018; PS36/019; PS36/020; PS36/021; PS36/022; PS36/023; PS36/024; PS36/040a; PS36/042; PS36/044; PS36/045; PS36/047; PS36/048a; PS36/050; PS36/051; PS36/052; PS36/053; PS36/055; PS36/056; PS36/057; PS36/059; PS36/060; PS36/062; PS36/064; PS36/066; PS36/067; PS36/071; PS36/072; RC08; RC08-18; RC11; RC1112; RC11-210; RC13; RC13-184; RC13-189; RC13-228; RC13-229; RC15; RC15-93; RC16; RC16-66; RC17; RC17-177; RC24; RC24-1; RC24-12; RC24-27; RC24-7; Reimers_G-255_BC; Reimers_H-238_BC; Reimers_J-208_BC; Reimers_K-218_BC; Reimers_M-231_BC; Robert Conrad; Sampling/drilling ice; SC; Scotia Sea; Scotia Sea, southwest Atlantic; Shona Ridge; Sierra Leone Basin/Guinea Basin; SL; Slope9102079; SO101; SO101/3_2-1; Soil combustion; Sonne; South Atlantic; South Atlantic Ocean; South-East Pacific; South Indian Ocean; South Pacific; South Pacific Ocean; St. Anna Trough, Kara Sea; SU81-14; SU81-18; Svalbard; T-3; T78-42; T78-46; T80-11; TC; TC05; TGT013-#058; TGT013-#063; TGT013-#066; TGT013-#088; TGT013-#093; TGT013-#104; TGT013-#113;
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 14
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    Unknown
    Sedimentology on cores from the east Greenland continental margin (2009)
    PANGAEA
    In:  Supplement to: Nam, Seung-Il (1997): Late Quaternary glacial history and paleoceanographic reconstructions along the East Greenland continental margin: Evidence from high-resolution records of stable isotopes and ice-rafted debris (Spätquartäre Vereisungsgeschichte und paläozeanographische Rekonstruktionen am ostgrönlandischen Kontinentalrand). Berichte zur Polarforschung = Reports on Polar Research, 241, 257 pp, https://doi.org/10.2312/BzP_0241_1997
    Details
    Publication Date: 2024-06-26
    Description: High-resolution stable oxygen and carbon isotope analyses and detailed sedimentological and geochemical investigations were performed in order to i) reconstruct the paleoclimate and paleoceanography of the Greenland Sea associated with late Quaternary glacial-interglacial cycles, and ii) to link the terrestrial and deep-sea climatic records. The reconstruction of the paleoenvironmental history of the East Greenland margin and the correlation between the terrestrial and deep sea records are major objectives of the ESF-PONAM-Programme (European Science Foundation - Polar North Atlantic Margins). For this study 16 gravity and 2 box cores were recovered along the East Greenland continental margin between 69°N and 72°N on three W-E transects running from the shelf to the deep sea. The glaciomarine sediments recovered from the heavily ice-covered East Greenland continental margin reflect changes associated with the glacial/interglacial climatic cycles of the last 240 ka. The glaciomarine sediments are characterised by a dominance of terrestrially derived components and a lower content of biogenic components. Glaciomarine sedimentation processes, terrigenous sediment input, and biogenic productivity in the study area are strongly influenced by fluctuations in the extent of the Greenland Ice Sheet, extent of the sea-ice cover, rate of iceberg drifting, meltwater input, and changes in the East Greenland Current (EGC). The relatively low carbonate content (〈10 %) and the dominant occurrence of N. pachyderma sin. (〉95 %) throughout the sediment sequences indicate a low biological productivity in the surface water resulting from the extensive sea-ice cover and the strong influence of cold and low-saline polar waters of the EGC. An increase in the surface-water productivity, on the other hand, occurred during certain periods within interglacial and glacial stages. This indicates that the sea ice along the Western margin of the Greenland Sea was at least seasonally reduced during these time intetvals. Based on the accumulation rates of the coarse terrigenous matter (〉63 µm) and amounts of IRD, the advance and retreat of East Greenland glaciers over the past 200 ka can be correlated with those postulated from the terrestrial records. At least five repeated advances and retreats of glaciers beyond the coastline are proposed between the late Early to Middle Weichselian (65-61, 59-51, 48-42, 35-31, and 28-25 ka). Maximum fluxes of IRD recorded along the continental margin between 21 and 16 ka, reflect the maximum extent of East Greenland glaciers probably reaching the shelf break at that time. The stable oxygen isotope records measured on the planktonic foraminifer N. pachyderma sin. reveal some excursions from the global climate record due to a local andlor regional overprint through meltwater supply andlor cold water masses of the EGC. Distinct meltwater events are documented during Terminations II and l and at the beginning of Stage 3 resulting from the collapse of the Greenland Ice Sheet. The early period of all glacial stages (i.e. 716, 514, and 312) was subjected to an abrupt and rapid build-up of a sea-ice cover. Hence, a distinct decrease in the carbonate content, the low number of planktonic foraminifers, and light d13C values reflect the strong reduction in the C02 exchange between the atmosphere and ocean, and the surface-water productivity, resulting from a meltwater cap andlor an extensive sea-ice cover. The onset of Termination l is characterised by a distinct shift towards light d180 values, a dramatic decrease in the IRD-flux, and a marked increase in organic matter, indicating the rapid retreat of East Greenland glaciers and a reduced sea-ice cover. According to distinct shifts toward light d180 and heavy d13C values of N. pachyderma sin. and O. umbonatus, the present-day circulation Patterns of surface- and deep-water masses were probably established between 7.4 and 6.1 ka. This is very similar to the timing estimated from studies On microfossil assemblages of the Greenland Sea. In particular, the distinct IRD peaks correlate with the fluctuations of the Greenland Ice Sheet during the last two glacial-interglacial cycles. Most of the major IRD peaks correspond to periods of cooling of air temperatures over Greenland. During the interval between 225 and 60 ka, the IRD peaks are in phase (at the 23-kyr orbital processional cycle) with maximum Summer Insolation at 70°N This suggests that the Greenland Ice Sheet may have experienced a predominantly 23-kyr cycle of growth and decay, and therefore, collapsed and discharged large volumes of icebergs to the Greenland Sea when Summer insolation reached its maxima. During the last glacial period, there is a strong correlation between major pulses in the supply of IRD, and the Bond Cycles and the Heinrich Events recorded in the GRIP ice core and North Atlantic deep-sea sediments. Furthermore, the higher frequency of IRD events on millennial scales matches the cooling phase of the abrupt Dansgaard-Oeschger Cycles recorded in the GRIP ice core. Consequently, the apparent evidence of millennial scale IRD events in the North Atlantic and the GIN Sea suggests coherent fluctuations of the large northern hemisphere ice sheets (i.e. the Fennoscandian/Barents Sea and Laurentide/Greenland ice sheets) during the last glacial period.
    Keywords: ARK-V/3b; ARK-VII/3b; AWI_Paleo; Giant box corer; GIK21723-1 PS13/187; GIK21724-2 PS13/191; GIK21725-2 PS13/192; GIK21726-1 PS13/193; GIK21726-2 PS13/193; GIK21730-1 PS13/224; GIK21730-2 PS13/224; GKG; Gravity corer (Kiel type); Greenland Sea; Greenland Shelf; Greenland Slope; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS13 GRÖKORT; PS17; PS17/247; PS17/248; PS17/249; PS17/250; PS17/251; PS17/285; PS17/286; PS17/287; PS17/288; PS17/289; PS17/290; PS1723-1; PS1724-2; PS1725-2; PS1726-1; PS1726-2; PS1730-1; PS1730-2; PS1923-2; PS1924-1; PS1925-2; PS1926-1; PS1927-2; PS1946-2; PS1947-1; PS1948-2; PS1949-1; PS1950-2; PS1951-1; Quaternary Environment of the Eurasian North; QUEEN; Scoresby Sund; SL
    Type: Dataset
    Format: application/zip, 63 datasets
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  • 15
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    Unknown
    Abundance and opal input of radiolarian species of two sediment cores from the Atlantic sector of the Southern Ocean (2009)
    PANGAEA
    In:  Supplement to: Jacot des Combes, Hélène; Abelmann, Andrea (2009): From species abundance to opal input: Simple geometric models of radiolarian skeletons from the Atlantic sector of the Southern Ocean. Deep Sea Research Part I: Oceanographic Research Papers, 56(5), 757-771, https://doi.org/10.1016/j.dsr.2008.12.019
    Details
    Publication Date: 2024-06-26
    Description: Radiolarian-based paleoceanographic reconstructions generally use the abundance of selected radiolarian species. However, the recent focus on the opal flux and the development of isotope measurements in biogenic opal and the organic matter embedded in it demands a better knowledge of the origin of the opal. We present here an estimation of the opal content of the skeleton of 63 radiolarian species from two sites in the Southern Ocean. The skeletons are modelled as associations of simple geometrical shapes, and the volume thus obtained is combined with opal density to obtain the amount of opal. These data are, thus, used to determine the most important opal carriers in the radiolarian assemblage in both cores.
    Keywords: ANT-VIII/3; ANT-XI/2; AWI_Paleo; Gravity corer (Kiel type); Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; PS16; PS16/311; PS1768-8; PS2498-1; PS28; PS28/304; Shona Ridge; SL; South Atlantic; SPP1158
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 16
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    Unknown
    Stable isotope record, and abundances of ice rafted debris and Neogloboquadrina pachyderma in sediments of the Iberian margin (2009)
    PANGAEA
    In:  Supplement to: Eynaud, Frédérique; de Abreu, Lucia; Voelker, Antje H L; Schönfeld, Joachim; Salgueiro, Emilia; Turon, Jean-Louis; Penaud, Aurélie; Toucanne, Samuel; Naughton, Filipa; Sanchez Goñi, Maria Fernanda; Malaizé, Bruno; Cacho, Isabel (2009): Position of the Polar Front along the western Iberian margin during key cold episodes of the last 45 ka. Geochemistry, Geophysics, Geosystems, 10(7), Q07U05, https://doi.org/10.1029/2009GC002398
    Details
    Publication Date: 2024-06-26
    Description: This paper documents the migration of the Polar Front (PF) over the Iberian margin during some of the cold climatic extremes of the last 45 ka. It is based on a compilation of robust and coherent paleohydrological proxies obtained from eleven cores distributed between 36 and 42°N. Planktonic delta18O (Globigerina bulloides), ice-rafted detritus concentrations, and the relative abundance of the polar foraminifera Neogloboquadrina pachyderma sinistral were used to track the PF position. These three data sets, compared from core to core, show a consistent evolution of the sea surface paleohydrology along the Iberian margin over the last 45 ka. We focused on five time slices representative of cold periods under distinct paleoenvironmental forcings: the 8.2 ka event and the Younger Dryas (two recent cold events occurring within high values of summer insolation), Heinrich events 1 and 4 (reflecting major episodes of massive iceberg discharges into the North Atlantic), and the Last Glacial Maximum (typifying the highest ice volume accumulated in the Northern Hemisphere). For each event, we generated schematic maps mirroring past sea surface hydrological conditions. The maps revealed that the Polar Front presence along the Iberian margin was restricted to Heinrich events. The sea surface conditions during the Last Glacial Maximum were close to those at present day, except for the northern sites which briefly experienced subarctic conditions.
    Keywords: 94a; 95; Atlantic Ocean; CALYPSO; Calypso Corer; CEPAG; GEOSCIENCES, MARMARCORE; Gravity corer (Kiel type); Gulf of Cádiz, Atlantic Ocean; IMAGES; IMAGES I; IMAGES V; International Marine Global Change Study; Le Suroît; M39/1; M39/1_08-3; M39008-3; Marge Ibérique; Marion Dufresne (1995); MD01-2444; MD03-2697; MD101; MD114; MD123; MD134; MD952039; MD95-2039; MD952040; MD95-2040; MD952041; MD95-2041; MD952042; MD95-2042; MD99-2331; MD99-2339; MD99-2341; Meteor (1986); PC; PICABIA; Piston corer; Porto Seamount; SL; SU81-18; Vigo
    Type: Dataset
    Format: application/zip, 14 datasets
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  • 17
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    Terrigenous sedimentation of sediment core GeoB6007-2 (2007)
    PANGAEA
    In:  Supplement to: Holz, Christine; Stuut, Jan-Berend W; Henrich, Rüdiger; Meggers, Helge (2007): Variability in terrigenous sedimentation processes off northwest Africa and its relation to climatic changes: inferrence from grain-size distributions of a Holocene marine sediment record. Sedimentary Geology, 202(3), 499-508, https://doi.org/10.1016/j.sedgeo.2007.03.015
    Details
    Publication Date: 2024-06-26
    Description: Variations in deposition of terrigenous fine sediments and their grain-size distributions from a high-resolution marine sediment record offshore northwest Africa (30°51.0'N; 10°16.1'W) document climate changes on the African continent during the Holocene. End-member grain-size distributions of the terrigenous silt fraction, which are related to fluvial and aeolian dust transport, indicate millennial-scale variability in the dominant transport processes at the investigation site off northwest Africa as well as recurring periods of dry conditions in northwest Africa during the Holocene. The terrigenous record from the subtropical North Atlantic reflects generally humid conditions before the Younger Dryas, during the early to mid-Holocene, as well as after 1.3 kyr BP. By contrast, continental runoff was reduced and arid conditions were prevalent at the beginning of the Younger Dryas and during the mid- and late Holocene. A comparison with high- and low-latitude Holocene climate records reveals a strong link between northwest African climate and Northern Hemisphere atmospheric circulation throughout the Holocene. Due to its proximal position, close to an ephemeral river system draining the Atlas Mountains as well as the adjacent Saharan desert, this detailed marine sediment record, which has a temporal resolution between 15 and 120 years, is ideally suited to enhance our understanding of ocean-continent-atmosphere interactions in African climates and the hydrological cycle of northern Africa after the last deglaciation.
    Keywords: GeoB; GeoB6007-2; Geosciences, University of Bremen; Gravity corer (Kiel type); M45/5a; Meteor (1986); SL
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 18
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    Chemical and isotopic compositions of sediments and some minerals from the Derugin Basin, Sea of Okhotsk (2007)
    PANGAEA
    In:  Supplement to: Derkachev, A N; Nikolaeva, N A; Mozherovsky, A V; Grigorieva, T N; Ivanova, E D; Pletnev, S P; Barinov, N N; Chubarov, Valerii M (2007): Mineralogical and geochemical indicators of anoxic sedimentation conditions in local depressions within the Sea of Okhotsk in Late Pleistocene-Holocene. Tikhookeanskaya Geologiya, No 3, 3-33
    Details
    Publication Date: 2024-06-26
    Description: The paper reports specific mineralogical and geochemical characteristics of deposits from local depressions of the Derugin Basin. They were formed in an environment with periodic changes from oxic to anoxic conditions and show evidence for presence of hydrogen sulfide in bottom waters. Deposits of this type can be considered as a modern model for ancient ore-bearing black shale associations. Compared with typical metalliferous black shale sequences, which are characterized by high contents of organic matter, the sediments described here are depleted in elements of the organophilic association (Mo, Ni, Cu, Zn, V, and U), but have higher Mn contents.
    Keywords: Akademik M.A. Lavrentyev; Archive of Ocean Data; ARCOD; Derugin Basin; GC; Gravity corer; Gravity corer (Russian type); KOL; KOMEX; KOMEX I; KOMEX II; LV28; LV28-37-1; LV29-103-2; LV29-104-2; LV29-2; Piston corer (Kiel type); RGC; Sakhalin shelf and slope; Sea of Okhotsk; SO178; SO178-13-4; SO178-78-1; Sonne
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 19
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    Element contents, sulfur and oxygen isotopes, and molecular biomarkers of phosphatic crust samples from the Chimbote Platform of the shelf off Peru (2009)
    PANGAEA
    In:  Supplement to: Arning, Esther T; Birgel, Daniel; Brunner, B; Peckmann, Jörn (2009): Bacterial formation of phosphatic laminites off Peru. Geobiology, 7, 295-307, https://doi.org/10.1111/j.1472-4669.2009.00197.x
    Details
    Publication Date: 2024-06-26
    Description: Authigenic phosphatic laminites enclosed in phosphorite crusts from the shelf off Peru (10°01' S and 10°24' S) consist of carbonate fluorapatite layers, which contain abundant sulfide minerals including pyrite (FeS2) and sphalerite (ZnS). Low d34Spyrite values (average -28.8 per mill) agree with bacterial sulfate reduction and subsequent pyrite formation. Stable sulfur isotopic compositions of sulfate bound in carbonate fluorapatite are lower than that of sulfate from ambient sea water, suggesting bacterial reoxidation of sulfide by sulfide-oxidizing bacteria. The release of phosphorus and subsequent formation of the autochthonous phosphatic laminites are apparently caused by the activity of sulfate-reducing bacteria and associated sulfide-oxidizing bacteria. Following an extraction-phosphorite dissolution-extraction procedure, molecular fossils of sulfate-reducing bacteria (mono-O-alkyl glycerol ethers, di-O-alkyl glycerol ethers, as well as the short-chain branched fatty acids i/ai-C15:0, i/ai-C17:0 and 10MeC16:0) are found to be among the most abundant compounds. The fact that these molecular fossils of sulfate-reducing bacteria are distinctly more abundant after dissolution of the phosphatic laminite reveals that the lipids are tightly bound to the mineral lattice of carbonate fluorapatite. Moreover, compared with the autochthonous laminite, molecular fossils of sulfate-reducing bacteria are: (1) significantly less abundant and (2) not as tightly bound to the mineral lattice in the other, allochthonous facies of the Peruvian crusts consisting of phosphatic coated grains. These observations confirm the importance of sulfate-reducing bacteria in the formation of the phosphatic laminite. Model calculations highlight that organic matter degradation by sulfate-reducing bacteria has the potential to liberate sufficient phosphorus for phosphogenesis.
    Keywords: 54GA; 84GA; Center for Marine Environmental Sciences; MARUM; PERU-AUFTRIEB; SO147; SO147_54GA; SO147_84GA; Sonne; Television-Grab; TVG
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 20
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    Meiobenthos at the Arctic Håkon Mosby Mud Volcano (2006)
    PANGAEA
    In:  Supplement to: Van Gaever, Saskia; Moodley, Leon; de Beer, Dirk; Vanreusel, Ann (2006): Meiobenthos at the Arctic Håkon Mosby Mud Volcano with a parental caring nematode thriving in sulphide-rich sediments. Marine Ecology Progress Series, 321, 143-155, https://doi.org/10.3354/meps321143
    Details
    Publication Date: 2024-06-26
    Description: Håkon Mosby Mud Volcano (HMMV, SW Barents Sea slope, 1280 m) is one of the numerous cold methane-venting seeps existing along the continental margins. Analyses of video-guided core samples revealed extreme differences in the diversity and density of the metazoan meiobenthic communities associated with the different sub-habitats (centre, microbial mats, Pogonophora field, outer rim) of this mud volcano. Diversity was lowest in the sulphidic, microbial mat sediments that supported the highest standing stock, with unusually high densities (11000 ind./10 cm**2) of 1 nematode species related to Geomonhystera disjuncta. Stable carbon isotope analyses revealed that this nematode species was thriving on chemosynthetically derived food sources in these sediments. Ovoviviparous reproduction has been identified as an important adaptation of parents securing the survival and development of their brood in this toxic environment. The proliferation of this single species in exclusive association with free-living, sulphide-oxidising bacteria (Beggiatoa) indicates that its dominance is strongly related to trophic specialisation, evidently uncommon among the meiofauna. This chemoautotrophic association was replaced by copepods in the bare, sulphide-free sediments of the volcano's centre, dominated by aerobic methane oxidation as the chemosynthetic process. Copepods and nauplii reached maximum densities and dominance in the volcano's centre (500 ind./10 cm**2). Their strongly depleted carbon isotope signatures indicated a trophic link with methane-derived carbon. This proliferation of only selected meiobenthic species supported by chemosynthetically derived carbon suggests that, in addition to the sediment geochemistry, the associated reduced meiobenthic diversity may equally be related to the trophic resource specificity in HMMV sub-habitats.
    Keywords: ARK-XIX/3b; HERMES; Hotspot Ecosystem Research on the Margins of European Seas; MUC; MultiCorer; Norwegian Sea; Polarstern; PS64; PS64/312-1; PS64/313-1; PS64/314-1; PS64/321-1; PS64/323-1; PS64/324-1; PS64/356-1; PS64/357-1; PS64/362-1; PS64/363-1a; PS64/363-1b; PS64/367-1; PS64/390-1a; PS64/390-1c; PS64/395-1
    Type: Dataset
    Format: application/zip, 30 datasets
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  • 21
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    Late Glacial/early Holocene benthic foraminifera assemblages, stable isotopes, IRD, magnetic susceptibility, Mn/Fe ratio and vivianite count from Storfjordrenna, western Barents Sea (2020)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Lateglacial/early Holocene interval from the sediment core JM09-020GC recovered in Storfjordrenna (western Barents Sea) has been studied for benthic foraminifera assemblages, stable isotopes, IRD, vivianite microconcretions, magnetic susceptibility, and elemental composition in order to identify the causes and mechanisms of abrupt climate change during the Younger Dryas. The core was retrieved with R/V Jan Mayen (University of Tromsø – The Arctic University of Norway, UiT) in November 2009 from the Storfjordrenna (76°31489' N, 19°69957' E) at a bottom depth of 253 m. Prior to sediment core opening, the magnetic susceptibility was measured using a loop sensor installed on a GEOTEK Multi Sensor Core Logger at the Department of Geology, UiT. Core sections were stored in the laboratory for one day prior to measurements, thus allowing the sediments to adjust to room temperature and avoiding measurement errors related to temperature changes (Weber et al., 1997). Qualitative element-geochemical measurements were performed with Avaatech X-ray fluorescence (XRF) core scanner using the following settings: 10 kV, 1000 µA, 10-s measuring time, and no filter. Sediment samples for foraminiferal and vivianite analyses were freeze-dried, weighed, and wet sieved using sieves with mesh sizes of 500 µm and 100 µm. The residues were dried, weighed again, and subsequently split on a dry micro-splitter. Where possible, at least 300 specimens of foraminifera were counted in every 1 cm of sediment. Species identification under a binocular microscope (Nikon SMZ1500) was supported using the classification of Loeblich and Tappan (1987), with few exceptions, and percentages of the eight indicator species were applied. The benthic foraminiferal abundance and ice-rafted debris (IRD; grains 〉500 µm) were counted under a stereo-microscope and expressed as flux values (number of specimens/grains cm-2 ka-1) using the bulk sediment density and sediment accumulation rate.
    Keywords: Arctic; Barents Sea; Benthic foraminifera; GC; Gravity corer; Holocene; Jan Mayen; JM09-020GC; JM09702; Stable isotopes; Storfjorden Trough; Svalbard; vivianite; XRF; Younger Dryas
    Type: Dataset
    Format: application/zip, 7 datasets
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  • 22
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    Paleomagnetic results of sixteen Black Sea cores beween 68.9 and 14.5 ka (2020)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Paleomagnetic results derived from sixteen Black Sea sediment cores. The natural remanent magnetization (NRM) and the anhysteretic remanent magnetization (ARM) were measured with a 2G Enterprises 755 SRM (cryogenic) long-core magnetometer equipped with a sample holder for eight discrete samples at a separation of 20 cm. The magnetometer's in-line tri-axial alternating field (AF) demagnetizer was used to demagnetize the NRM and ARM of the samples. The NRM was measured after application of AF peak amplitudes of 0, 5, 10, 15, 20, 30, 40, 50, 65, 80, and 100 mT. Directions of the characteristic remanent magnetization (ChRM) were determined by principle component analysis (PCA) according to Kirschvink (1980). The error range of the ChRM is given as the maximum angular deviation (MAD). The ARM was imparted along the samples' z-axis with a static field of 0.05 mT and an AF field of 100 mT. Demagnetization then was performed in steps of 0, 10, 20, 30, 40, 50, 65, and 80 mT. The median destructive field of the ARM (MDFARM) was determined to estimate the coercivity of the sediments. The slope of NRM versus ARM of common demagnetization steps was used to determine the relative paleointensity (rPI). In most cases, demagnetization steps from 20 to 65 mT were used to determine the rPI. Note, in all studied Black Sea sediment cores, samples with SIRM/κ~LF~ ratios 〉10 kAm^-1^ (SIRM: saturated iso-thermal remanent magnetization, κ~LF~: low-field magnetic susceptibility), empirically found to indicate the presence of diagenetically formed greigite, were omitted for paleomagnetic studies. I chrm: characteristic inclination D chrm: characteristic declination Slope-rPI: relative paleointensity determined by slope NRM/ARM during alternating field demagnetization; NRM: natural remanent magnetization, ARM: anhysteretic remanent magnetization
    Keywords: Baltic Sea Research Institute, Warnemünde; Black Sea; GeoForschungszentrum Potsdam; GFZ; IOW; Laschamps; Mono Lake; Norwegian-Greenland Sea; Paleosecular variation
    Type: Dataset
    Format: application/zip, 16 datasets
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  • 23
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    Time series of atmospheric methane and carbon dioxide concentrations measured during POSEIDON cruise POS533 (2020)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2024-06-26
    Description: The atmospheric CO₂ and CH4 concentrations were monitored throughout the cruise using a cavity ring down spectrometer (CRDS, Picarro G2301-f) and GEOMARs 'Atmospheric Intake System' (AIS).
    Keywords: AIMAC; CT; POS533/1; POS533-track; Poseidon; Underway cruise track measurements
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    Format: application/zip, 23 datasets
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  • 24
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    Stable oxygen isotope and Mg/Ca records from main pathway of Indonesian Throughflow (2021)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: The Indonesian Throughflow (ITF), as the sole low-latitude conduit connecting the Pacific and Indian Oceans, regulates the thermohaline balance between these oceans. Investigating the spatio-temporal variability of the ITF and its relationship to precessional forcing is, thus, crucial for understanding the drivers of tropical climate change. Here, we reconstruct the history of the ITF over the past ~120 kyr, based on high resolution (~400 yr) δ18O and Mg/Ca records of Globigerinoides ruber and Pulleniatina obliquiloculata from Core SO217-18540 retrieved from the Flores Sea upwelling region within the main pathway of the ITF. Comparison of these new records with published paleo-oceanographic and climatological data from the western tropical Pacific suggests that annual mean conditions in the Flores Sea were controlled by the ITF rather than by monsoonal upwelling. Our results further indicate that precessional insolation was a major forcing for the hydrological evolution of the ITF during the past 120 kyr. We suggest that precessional insolation forcing paced ITF variability by modulating the mean state of El Niño-Southern Oscillation-like conditions and latitudinal shifts or expansion/contraction of the Intertropical Convergence Zone.
    Keywords: Cibicidoides wuellerstorfi; Flores Sea; GIK18540-3; Globigerinoides ruber; KL; MAJA; Mg/Ca ratio; Piston corer (BGR type); Pulleniatina obliquiloculata; SO217; SO217_26-3; Sonne; stable oxygen isotope
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 25
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    Paleomagnetic record (inclination, declination, relative paleo-intensity) in marine sediment core MD01-2414 from the central Okhotsk Sea (2021)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Okhotsk Sea connects the high latitude Asian continent and North Pacific which plays an important role in modern and long-term glacial–interglacial climate changes linked to subarctic terrestrial and marine systems. On the basis of the marine sediment core MD01-2414 (53°11.77′N, 149°34.80′E, water depth: 1,123 m) taken in the central Okhotsk Sea, we here improve the pre-existing magnetostratigraphy by proposing a new age model, and reconstruct both the terrigenous transport and paleoceanographic variations during the past 1550 thousand years ago (ka). Seventeen geomagnetic excursions are identified from the paleomagnetic directional record. Close to the bottom of the core, an excursion was observed, which is proposed to be the Gilsa event at ~1550 ka. During glacial periods, our records reveal a wide extension of sea ice coverage and low marine productivity. We observed ice-rafted debris from mountain icebergs composed of coarse and high magnetic terrigenous detritus which were transported from the Kamchatka Peninsula to the central Okhotsk basin. Still during glacial periods, the initiation (i.e., at ~900 ka) of the Mid-Pleistocene Transition marks the change to even lower marine productivity, suggesting that sea-ice coverage became larger after this event. During interglacial periods, the sea-ice was either inexistent or at best seasonal in the central Okhotsk Sea; resulting in high marine productivity. The weaker formation of Okhotsk Sea Intermediate Water, lower ventilation, and microbial degradation of organic matter depleted the oxygen concentration in the bottom water and created a reduced environment condition in the sea basin. The freshwater supplied by snow or glacier melting from Siberia and Kamchatka delivered fine grain sediments to Okhotsk Sea. During the super-interglacial periods after the Mid-Brunhes Transition (i.e., Marine Isotope Stages 1, 5e, 9, and 11), strong freshwater discharged from Amur River drainage area associated with active East Asian Summer Monsoon, this phenomenon enhanced the input of fine-grained terrigenous detritus to the central Okhotsk Sea.
    Keywords: environmental magnetism; marine sediments; Mid-Brunhes Transition; mid-Pleistocene transition; Okhotsk Sea; paleomagnetism; Sea ice; Super-interglacial; terrigenous detritus
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    Format: application/zip, 3 datasets
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  • 26
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    EM-Bird ice thickness measurements in the Transpolar Drift during MOSAiC 2019/2020, part 1 (2021)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Total (snow+ice) thickness measurements obtained during the international Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) campaign using the helicopters on board the research vessels Polarstern and Akademik Fedorov. The data was gathered during 14 flights between October 2019 and July 2020 in the Transpolar Drift on spatial scales up to 80 km distance from the position of the ships. Version 1.0. For details for the processing, please see Henricks & Rohde (2020), Haas et al. (2009) and von Albedyll et al. (2021).
    Keywords: AF-MOSAiC-1; AF-MOSAiC-1_5; Akademik Fedorov; Arctic Ocean; EM; HELI; Helicopter; IceSense; Mosaic; MOSAiC; MOSAiC20192020; MOSAiC20192020, AF122/1; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Polarstern; PS122_4_44_127_2020062101; PS122_4_44_128_2020062102; PS122_4_44_130_2020062201; PS122_4_44_95_2020061901; PS122_4_45_38_2020063003; PS122_4_45_54_2020070101; PS122_4_46_40_2020070704; PS122/1_3-5; PS122/3; PS122/3_34-93; PS122/3_34-94; PS122/3_35-91; PS122/3_36-156; PS122/3_37-137; PS122/3_38-112; PS122/4; PS122/4_44-127; PS122/4_44-128; PS122/4_44-130; PS122/4_44-95; PS122/4_45-38; PS122/4_45-54; PS122/4_46-40; Remote Sensing of the Seasonal Evolution of Climate-relevant Sea Ice Properties; Sea ice thickness
    Type: Dataset
    Format: application/zip, 14 datasets
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  • 27
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    Solar radiation over and under sea ice and drift of sea ice from autonomous measurements from radiation station 2018R4, deployed during Oden_AO18 (2024)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2024-06-26
    Description: Solar radiation over and under sea ice was measured by radiation station 2014R4, an autonomous platform, installed on drifting Multi-Year-Ice (MYI) in the Arctic Ocean during Oden_AO18. The resulting time series describes radiation measurements as a function of place and time between 20 August 2018 and 20 December 2018 in sample intervals of 3 hours. The radiation measurements have been performed with spectral radiometers. All data are given in full spectral resolution interpolated to 1.0 nm, and integrated over the entire wavelength range (broadband, total: 320 to 950 nm). Two sensors, solar irradiance and upward reflected solar irradiance, were mounted on a on a platform about 1 m above the sea ice surface. The third sensor was mounted 0.5 m underneath the sea ice measuring the downward transmitted irradiance. Along with the radiation measurements, this autonomous platform consisted of thermistor chain with 208 sensors and several other sensor packages, which measured water temperature, pressure and conductivity at hourly intervals. An underwater lightchain measured counts of red, green and blue light at 49 positions at hourly intervals. All times are given in UTC.
    Keywords: 2018R4; Arctic Ocean; Arctic Ocean 2018, MOCCHA; autonomous platform; AWI_SeaIce; buoy; Conductivity; Current sea ice maps for Arctic and Antarctic; drift; drift ice; Ice mass balance; light chain; meereisportal.de; MIDO; Multidisciplinary Ice-based Distributed Observatory; Oden; Oden_AO2018; Oden_AO2018_2018R4; RAD_S; Radiation Station; Sea Ice Physics @ AWI; solar radiation
    Type: Dataset
    Format: application/zip, 69 datasets
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  • 28
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    Drift trajectories of the main sites of the Distributed Network of MOSAiC 2019/2020 (2021)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2024-06-26
    Description: During the “Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC)” in 2019/2020 a Distributed Network (DN) of autonomous stations (buoys) was installed on the sea ice and drifted across the Arctic Ocean. This network consisted of 〉200 individual devices ranging from simple position buoys to complex and interdisciplinary multi-sensor platforms. Most (complex) measurements were performed on sea ice floes (sites or nodes) by co-located instruments. These sites were called medium (M) and large (L) sites. In addition, autonomous instruments were operated in the Central Observatory (CO), which consisted of the research ice breaker Polarstern and the adjacent ice camp. Initially, 4 L and 9 M sites were installed around the CO in a distance of up to 40 km. However, their distances and relative positions changed over time due to the drift of the ice pack over time. Over the course of the MOSAiC expedition, 3 different COs were established because of re-locations of RV Polarstern: CO1 started with the first drift of Polarstern on 04 October 2019; CO2 started with the second drift on 19 June 2020; and CO3 started with the third drift on 21 August 2020.
    Keywords: 2019O4; 2019O6; 2019T66; 2019V4; 2020M26; 2020O10; 2020P225; AF-MOSAiC-1; AF-MOSAiC-1_105; AF-MOSAiC-1_109; AF-MOSAiC-1_112; AF-MOSAiC-1_117; AF-MOSAiC-1_120; AF-MOSAiC-1_124; AF-MOSAiC-1_127; AF-MOSAiC-1_128; AF-MOSAiC-1_77; AF-MOSAiC-1_86; AF-MOSAiC-1_95; Akademik Fedorov; Akademik Tryoshnikov; Arctic Ocean; AT-MOSAiC-1; AT-MOSAiC-1_1; AT-MOSAiC-1_3; AT-MOSAiC-1_4; BUOY_CTD_CHAIN; BUOY_SNOW; Buoy, Drift Towing Ocean Profiler; Buoy; CTD chain; CT; distributed network; drift track; DTOP; Ice Mass Balance buoy, flexibel; Ice-Tethered Profiler; IMBflex; ISVP; ITP; ITP94, 2019W2, PS122/1_1-168; Mosaic; MOSAiC; MOSAiC20192020; MOSAiC20192020, AF122/1; Multidisciplinary drifting Observatory for the Study of Arctic Climate; North Greenland Sea; Ocean CTD buoy; OCTDB; Polarstern; PS122/1; PS122/1_1-124; PS122/1_1-139, 2019S94; PS122/1_1-145, 2019S81; PS122/1_1-151, 2019O4; PS122/1_1-153, 2019O6; PS122/1_1-154, 2019O7; PS122/1_1-172, 2019T69; PS122/1_1-275, 2019V1; PS122/1_1-276, 2019V2; PS122/1_1-278, 2019V4; PS122/1_1-314, 2019T67; PS122/1-track; PS122/2; PS122/2-track; PS122/3; PS122/3_28-114; PS122/3-track; PS122/4; PS122/4_43-68; PS122/4-track; PS122/5; PS122/5_58-94; PS122/5-track; SAMS Ice Mass Balance buoy; SIMBA; Snow buoy; Surface velocity profiler; Underway cruise track measurements
    Type: Dataset
    Format: application/zip, 15 datasets
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  • 29
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    Drift Towing Ocean Profiler (DTOP) data on sea ice, meteorological conditions and drift of sea ice from buoy 2019V3, deployed during MOSAiC 2019/20 (2021)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Vertical profiles of water temperature, pressure and salinity were measured by the Drift Towing Ocean Profiler (DTOP) buoy 2019V3, a.k.a. 2019C, an autonomous platform, installed on drifting sea ice in the Arctic Ocean during MOSAiC (Leg 1) 2019/20. The resulting time series describes the vertical profile of the ocean below the sea ice as a function of place and time between 07 October 2019 and 03 August 2020 in sample intervals of 12 hours. In addition, the DTOP measured air temperature, relative humidity and barometric pressure and GPS position at hourly intervals. This instrument was deployed as part of the projects National Key R&D Program of China and The Marine S&T Fund of Shandong Province for Qingdao National Laboratory for Marine Science and Technology.
    Keywords: 2019V3; AF-MOSAiC-1; AF-MOSAiC-1_113; Akademik Fedorov; Arctic Ocean; autonomous platform; buoy; Buoy, Drift Towing Ocean Profiler; Current sea ice maps for Arctic and Antarctic; drift; DTOP; meereisportal.de; MOSAiC; MOSAiC20192020; MOSAiC20192020, AF122/1; Multidisciplinary drifting Observatory for the Study of Arctic Climate; ocean profile; Polarstern; PS122/1_1-277, 2019V3; PS122/4; PS122/4_43-160; Salinity; Temperature
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 30
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    Raw data of CTD buoys 2019O1 to 2019O8 as part of the MOSAiC Distributed Network (2021)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: A set of eight ice-tethered buoy systems (2019O1 to 2019O8) were deployed by the Akademik Fedorov in the Northern Laptev Sea in early October 2019 as part of the MOSAiC Distributed Network. Each buoy consisted of 5 Seabird SBE37IMP Microcat CTDs mounted along an inductive modem tether at depths of 10, 20, 50, 75 and 100m. The buoys were installed on stable sea ice floes (designated as “M-sites”) at a distance of 15-35 km around the main MOSAiC ice camp, and co-located with Snow Buoys, Ice Mass Balance Buoys and D-TOP ocean profilers. The individual instruments were programmed to record oceanographic data internally at 2-minute intervals. The surface unit of the buoy prompted the instruments for an additional measurement every 10 minutes, which was then transmitted to a base station via iridium along with GPS position and time, as well as surface temperature. After a several months long drift through the Central Arctic Ocean, 4 out of 8 buoys were recovered in August 2020, and the internally recorded data from the CTDs were secured. The attached zip archive comprises the unprocessed 10-minute data transmitted by the buoy (.txt file), as well as the 2-minute data downloaded and converted from the 5 individual CTDs after their recovery (either .cap or .cnv). A processed and quality controlled version of this dataset will be supplemented and linked to upon completion. A link to a data paper describing the processing will be given below.
    Keywords: 2019O1; 2019O3; 2019O4; 2019O6; AF-MOSAiC-1; AF-MOSAiC-1_106; AF-MOSAiC-1_110; AF-MOSAiC-1_114; AF-MOSAiC-1_117; AF-MOSAiC-1_121; AF-MOSAiC-1_124; AF-MOSAiC-1_127; AF-MOSAiC-1_131; Akademik Fedorov; Akademik Tryoshnikov; Arctic Ocean; AT-MOSAiC-1; AT-MOSAiC-1_1; AT-MOSAiC-1_4; buoy; eddy; FRAM; FRontiers in Arctic marine Monitoring; mesoscale; MIDO; MOSAiC; MOSAIC_PO; MOSAiC20192020; MOSAiC20192020, AF122/1; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Multidisciplinary Ice-based Distributed Observatory; North Greenland Sea; Ocean CTD buoy; oceanography; OCTDB; Polarstern; PS122/1_1-148, 2019O1; PS122/1_1-149, 2019O2; PS122/1_1-150, 2019O3; PS122/1_1-151, 2019O4; PS122/1_1-152, 2019O5; PS122/1_1-153, 2019O6; PS122/1_1-154, 2019O7; PS122/1_1-155, 2019O8; PS122/4; PS122/4_43-149; PS122/4_43-165; Transpolar Drift
    Type: Dataset
    Format: application/zip, 8 datasets
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  • 31
    facet.materialart.
    Unknown
    Snowpit raw data collected during the MOSAiC expedition (2021)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: This dataset captures the yearlong evolution of physical properties of the snow cover over Arctic sea ice during the MOSAiC expedition (October 2019-September 2020). It also includes the surface scattering layer that is typical of the melting summer sea ice surface. This dataset is specifically for measurements that were logged as “snowpit events” during MOSAiC. The snowpit events were either detailed point-measurements of vertical snow profiles or horizontally repeated transects, measured at selected locations in designated undisturbed areas. One snowpit event corresponds to one site visit. The snowpits are often co-located with measurements from other MOSAiC teams to improve our understanding of how snow cover affects and interacts with the atmosphere-sea ice-ocean-ecology system. Most snowpits were measured at least bi-weekly to capture the temporal evolution of physical properties of snow. Some snowpits were one-off events to capture interesting and unplanned-for surface conditions. This dataset includes 576 snowpit events, and describes the snow conditions during the entire expedition. Please direct inquiries to; David Wagner (PS122/1), Martin Schneebeli (PS122/2), Amy Macfarlane (PS122/3 and PS122/4), Ruzica Dadic (PS122/5).
    Keywords: Arctic Ocean; Arctic Research Icebreaker Consortium: A strategy for meeting the needs for marine-based research in the Arctic; ARICE; MOSAiC; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Polarstern; PS122/1; PS122/1_10-11; PS122/1_10-18; PS122/1_10-5; PS122/1_10-50; PS122/1_10-58; PS122/1_10-70; PS122/1_10-71; PS122/1_10-72; PS122/1_11-23; PS122/1_4-10; PS122/1_5-28; PS122/1_5-35; PS122/1_5-5; PS122/1_6-146; PS122/1_6-147; PS122/1_6-29; PS122/1_6-30; PS122/1_6-41; PS122/1_6-42; PS122/1_6-43; PS122/1_6-44; PS122/1_6-45; PS122/1_6-46; PS122/1_6-47; PS122/1_6-5; PS122/1_6-6; PS122/1_6-65; PS122/1_6-66; PS122/1_6-67; PS122/1_6-68; PS122/1_6-69; PS122/1_6-70; PS122/1_6-75; PS122/1_7-12; PS122/1_7-129; PS122/1_7-32; PS122/1_7-33; PS122/1_7-34; PS122/1_7-35; PS122/1_7-36; PS122/1_7-37; PS122/1_7-38; PS122/1_7-5; PS122/1_7-68; PS122/1_7-69; PS122/1_7-70; PS122/1_7-71; PS122/1_7-72; PS122/1_7-73; PS122/1_7-8; PS122/1_7-87; PS122/1_7-88; PS122/1_8-1; PS122/1_8-27; PS122/1_8-28; PS122/1_8-29; PS122/1_8-30; PS122/1_8-31; PS122/1_8-32; PS122/1_8-68; PS122/1_8-69; PS122/1_8-70; PS122/1_8-78; PS122/1_8-79; PS122/1_9-111; PS122/1_9-117; PS122/1_9-23; PS122/1_9-25; PS122/1_9-3; PS122/1_9-71; PS122/1_9-72; PS122/1_9-73; PS122/1_9-74; PS122/2; PS122/2_16-24; PS122/2_16-44; PS122/2_16-45; PS122/2_16-46; PS122/2_16-62; PS122/2_16-73; PS122/2_16-9; PS122/2_16-90; PS122/2_17-109; PS122/2_17-16; PS122/2_17-43; PS122/2_17-44; PS122/2_17-45; PS122/2_17-46; PS122/2_17-47; PS122/2_17-49; PS122/2_17-89; PS122/2_17-90; PS122/2_17-91; PS122/2_18-107; PS122/2_18-108; PS122/2_18-17; PS122/2_18-47; PS122/2_18-52; PS122/2_18-53; PS122/2_18-54; PS122/2_18-55; PS122/2_18-56; PS122/2_18-66; PS122/2_18-76; PS122/2_18-8; PS122/2_18-9; PS122/2_19-128; PS122/2_19-129; PS122/2_19-131; PS122/2_19-132; PS122/2_19-133; PS122/2_19-134; PS122/2_19-135; PS122/2_19-137; PS122/2_19-141; PS122/2_19-142; PS122/2_19-144; PS122/2_19-145; PS122/2_19-146; PS122/2_19-160; PS122/2_19-161; PS122/2_19-181; PS122/2_19-28; PS122/2_19-35; PS122/2_19-41; PS122/2_19-75; PS122/2_19-9; PS122/2_19-92; PS122/2_20-107; PS122/2_20-108; PS122/2_20-123; PS122/2_20-136; PS122/2_20-137; PS122/2_20-138; PS122/2_20-139; PS122/2_20-140; PS122/2_20-141; PS122/2_20-142; PS122/2_20-143; PS122/2_20-144; PS122/2_20-145; PS122/2_20-164; PS122/2_20-35; PS122/2_20-36; PS122/2_20-4; PS122/2_20-70; PS122/2_20-80; PS122/2_20-83; PS122/2_21-14; PS122/2_21-15; PS122/2_21-158; PS122/2_21-159; PS122/2_21-16; PS122/2_21-170; PS122/2_21-52; PS122/2_21-53; PS122/2_21-72; PS122/2_21-84; PS122/2_21-96; PS122/2_22-43; PS122/2_22-46; PS122/2_22-5; PS122/2_22-6; PS122/2_22-61; PS122/2_22-66; PS122/2_22-67; PS122/2_22-68; PS122/2_22-69; PS122/2_22-73; PS122/2_22-74; PS122/2_23-105; PS122/2_23-2; PS122/2_23-34; PS122/2_23-53; PS122/2_23-73; PS122/2_23-74; PS122/2_23-75; PS122/2_23-76; PS122/2_23-77; PS122/2_23-78; PS122/2_23-79; PS122/2_23-85; PS122/2_23-9; PS122/2_24-112; PS122/2_24-113; PS122/2_24-14; PS122/2_24-15; PS122/2_24-16; PS122/2_24-35; PS122/2_24-56; PS122/2_24-81; PS122/2_24-86; PS122/2_25-105; PS122/2_25-128; PS122/2_25-22; PS122/2_25-23; PS122/2_25-59; PS122/2_25-60; PS122/2_25-61; PS122/2_25-62; PS122/2_25-63; PS122/2_25-80; PS122/2_25-81; PS122/3; PS122/3_29-28; PS122/3_29-29; PS122/3_29-38; PS122/3_29-43; PS122/3_29-50; PS122/3_29-9; PS122/3_30-17; PS122/3_30-25; PS122/3_30-42; PS122/3_30-61; PS122/3_31-55; PS122/3_31-79; PS122/3_32-22; PS122/3_32-41; PS122/3_32-59; PS122/3_32-61; PS122/3_32-88; PS122/3_32-92; PS122/3_32-93; PS122/3_33-102; PS122/3_33-103; PS122/3_33-112; PS122/3_33-113; PS122/3_33-40; PS122/3_33-41; PS122/3_33-42; PS122/3_33-65; PS122/3_33-66; PS122/3_34-2; PS122/3_34-34; PS122/3_34-45; PS122/3_34-46; PS122/3_34-60; PS122/3_34-91; PS122/3_35-111; PS122/3_35-120; PS122/3_35-121; PS122/3_35-23; PS122/3_35-24; PS122/3_35-53; PS122/3_35-56; PS122/3_36-102; PS122/3_36-103; PS122/3_36-104; PS122/3_36-105; PS122/3_36-106; PS122/3_36-107; PS122/3_36-137; PS122/3_36-138; PS122/3_36-14; PS122/3_36-15; PS122/3_36-35; PS122/3_36-99; PS122/3_37-129; PS122/3_37-130; PS122/3_37-131; PS122/3_37-132; PS122/3_37-133; PS122/3_37-156; PS122/3_37-21; PS122/3_37-22; PS122/3_37-39; PS122/3_37-40; PS122/3_37-41; PS122/3_37-56; PS122/3_37-57; PS122/3_37-58; PS122/3_37-68; PS122/3_38-1; PS122/3_38-141; PS122/3_38-142; PS122/3_38-152; PS122/3_38-4; PS122/3_38-51; PS122/3_38-52; PS122/3_38-93; PS122/3_38-94; PS122/3_38-95; PS122/3_38-96; PS122/3_38-97; PS122/3_38-98; PS122/3_39-45; PS122/3_39-46; PS122/3_39-47; PS122/3_39-48; PS122/3_39-87; PS122/3_39-88; PS122/3_39-89; PS122/3_39-90; PS122/3_39-91; PS122/3_39-92; PS122/3_40-14; PS122/3_40-15; PS122/4; PS122/4_44-121; PS122/4_44-122; PS122/4_44-155; PS122/4_44-156; PS122/4_44-157; PS122/4_44-193; PS122/4_44-215; PS122/4_44-216; PS122/4_44-218; PS122/4_44-220; PS122/4_44-249; PS122/4_44-44; PS122/4_44-45; PS122/4_44-46; PS122/4_44-47; PS122/4_45-107; PS122/4_45-108; PS122/4_45-132; PS122/4_45-16; PS122/4_45-17; PS122/4_45-176; PS122/4_45-177; PS122/4_45-179; PS122/4_45-18; PS122/4_45-180; PS122/4_45-181; PS122/4_45-182; PS122/4_45-46; PS122/4_45-62; PS122/4_45-63; PS122/4_45-8; PS122/4_45-86; PS122/4_45-87; PS122/4_45-89; PS122/4_46-104; PS122/4_46-105; PS122/4_46-106; PS122/4_46-107; PS122/4_46-108; PS122/4_46-109; PS122/4_46-110; PS122/4_46-111; PS122/4_46-112; PS122/4_46-135; PS122/4_46-138; PS122/4_46-139; PS122/4_46-140; PS122/4_46-146; PS122/4_46-181; PS122/4_46-187; PS122/4_46-188; PS122/4_46-190; PS122/4_46-191; PS122/4_46-192; PS122/4_46-288; PS122/4_46-29; PS122/4_46-30; PS122/4_46-31; PS122/4_46-32; PS122/4_46-48; PS122/4_46-50; PS122/4_47-156; PS122/4_47-175; PS122/4_47-176; PS122/4_47-177; PS122/4_47-178; PS122/4_47-179; PS122/4_47-22; PS122/4_47-23; PS122/4_47-61; PS122/4_47-66; PS122/4_47-76; PS122/4_47-77; PS122/4_47-97; PS122/4_48-100; PS122/4_48-142; PS122/4_48-143; PS122/4_48-144; PS122/4_48-145; PS122/4_48-146; PS122/4_48-147; PS122/4_48-148; PS122/4_48-177; PS122/4_48-186; PS122/4_48-187; PS122/4_48-188; PS122/4_48-189; PS122/4_48-190; PS122/4_48-191; PS122/4_48-196; PS122/4_48-40; PS122/4_48-41; PS122/4_48-42; PS122/4_48-43; PS122/4_48-44; PS122/4_48-45; PS122/4_48-47; PS122/4_48-58; PS122/4_48-83; PS122/4_48-85; PS122/4_48-86; PS122/4_49-15; PS122/4_49-19; PS122/4_49-20; PS122/4_49-46; PS122/4_49-47; PS122/4_49-48; PS122/4_49-7; PS122/4_49-8; PS122/4_99-56; PS122/4_99-57; PS122/4_99-58; PS122/4_99-59; PS122/4_99-60; PS122/4_99-61; PS122/4_99-62; PS122/4_99-63; PS122/4_99-65; PS122/4_99-66; PS122/4_99-67; PS122/4_99-68; PS122/4_99-69; PS122/4_99-70; PS122/4_99-71; PS122/4_99-72; PS122/4_99-73; PS122/5; PS122/5_59-193; PS122/5_59-204; PS122/5_59-206; PS122/5_59-222; PS122/5_59-235; PS122/5_59-250; PS122/5_59-267; PS122/5_59-268; PS122/5_59-292; PS122/5_59-302; PS122/5_59-303; PS122/5_59-304; PS122/5_59-313; PS122/5_59-314; PS122/5_59-315; PS122/5_59-350; PS122/5_59-351; PS122/5_59-352; PS122/5_59-353; PS122/5_59-354; PS122/5_59-368; PS122/5_60-10; PS122/5_60-117; PS122/5_60-118; PS122/5_60-119; PS122/5_60-120; PS122/5_60-128; PS122/5_60-142; PS122/5_60-143; PS122/5_60-144; PS122/5_60-145; PS122/5_60-168; PS122/5_60-170; PS122/5_60-2; PS122/5_60-24; PS122/5_60-25; PS122/5_60-26; PS122/5_60-43; PS122/5_60-74; PS122/5_60-75; PS122/5_60-76; PS122/5_60-77; PS122/5_60-78; PS122/5_60-91; PS122/5_61-10; PS122/5_61-102; PS122/5_61-103; PS122/5_61-104; PS122/5_61-105; PS122/5_61-132; PS122/5_61-138; PS122/5_61-139; PS122/5_61-140; PS122/5_61-162; PS122/5_61-166; PS122/5_61-167; PS122/5_61-168; PS122/5_61-170; PS122/5_61-198; PS122/5_61-2; PS122/5_61-230; PS122/5_61-231; PS122/5_61-232; PS122/5_61-233; PS122/5_61-234; PS122/5_61-235; PS122/5_61-236; PS122/5_61-237; PS122/5_61-25; PS122/5_61-27; PS122/5_61-28; PS122/5_61-29; PS122/5_61-4; PS122/5_61-5; PS122/5_61-8; PS122/5_61-9; PS122/5_61-97; PS122/5_62-10; PS122/5_62-100; PS122/5_62-101; PS122/5_62-102; PS122/5_62-119; PS122/5_62-123; PS122/5_62-124; PS122/5_62-125; PS122/5_62-126; PS122/
    Type: Dataset
    Format: application/zip, 15 datasets
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  • 32
    facet.materialart.
    Unknown
    Physical oceanography (p-CTD) during the cruise SO269 in South China Sea in August/September 2019 (2021)
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    Publication Date: 2024-06-26
    Description: This dataset provides 37 CTD profiles measured on board of the German R/V Sonne (cruise SO269) in the northern South China Sea, under the project SOCLIS – South China Sea Natural Laboratory under Climatic and Anthropogenic Stress, in August and September 2019. The 37 profiles of temperature, salinity, dissolved oxygen, fluorescence, turbidity, surface irradiance (SPAR) and Photosynthetically active radiation (PAR), and sound velocity were measured using a CTD Sea-Bird SBE 911 plus, together with oxygen sensor (SBE 43), PAR sensor (Biospherical, QCP-2350 + QSR-2200), and a fluorometer (WET Labs ECO-FLNTU(RT)D). Additionally, dissolved oxygen, potential temperature and sigma-theta (with reference to the surface) were calculated. The 37 additional CTD files complement the physical oceanography dataset (Waniek et al., 2021).
    Keywords: physical oceanography; SOCLIS; South China Sea; South China Sea Natural Laboratory under Climatic and Anthropogenic Stress
    Type: Dataset
    Format: application/zip, 37 datasets
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  • 33
    facet.materialart.
    Unknown
    Temperature and heating induced temperature difference measurements from the modular buoy 2020M26, deployed during MOSAiC 2019/20 (2021)
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    Publication Date: 2024-06-26
    Description: Temperature and heating-induced temperature differences were measured along a chain of thermistors. 2020M26 (a.k.a. Bruncin IMB042) is an autonomous modular instrument that was installed on drifting sea ice in the Arctic Ocean during the 4th leg of MOSAiC in June 2020. The thermistor chain was 5 m long and included 256 sensors. The resulting time series describes the evolution of temperature and temperature differences after three heating cycles of 4, 20 and 24 s as a function of place, depth and time between 26 June 2020 and 19 August 2020 in sample intervals of 1 hour for temperature and 6 hours for temperature differences. In addition, this modular buoy consisted of sensors measuring position (GPS) and barometric pressure at hourly intervals. The buoy was installed on a ridge, called Jaridge that was studied during leg 4, in the MOSAiC Central Observatory. This instrument was deployed as part of the project Ridges - Safe HAVens for ice-associated Flora and Fauna in a Seasonally ice-covered Arctic OCean (HAVOC), funded by the Research Council of Norway (project number 280292).
    Keywords: 2020M26; Arctic Ocean; autonomous platform; buoy; Current sea ice maps for Arctic and Antarctic; HAVOC; Ice mass balance; Ice Mass Balance buoy, flexibel; IMBflex; meereisportal.de; MOSAiC; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Polarstern; PS122/4; PS122/4_43-68; Ridges - Safe HAVens for ice-associated Flora and Fauna in a Seasonally ice-covered Arctic OCean; solar radiation; Temperature
    Type: Dataset
    Format: application/zip, 6 datasets
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  • 34
    facet.materialart.
    Unknown
    Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years (2021)
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    Publication Date: 2024-06-26
    Description: The Southern Ocean paleoceanography provides key insights into how iron fertilization and oceanic productivity developed through Pleistocene ice-ages and their role in influencing the carbon cycle. We report the first high-resolution record of dust deposition and ocean productivity for the Antarctic Zone, close to the main dust source, Patagonia. Our deep-ocean records cover the last 1.5 Ma, thus doubling that from Antarctic ice-cores. We find a 5 to 15-fold increase in dust deposition during glacials and a 2 to 5-fold increase in biogenic silica deposition, reflecting higher ocean productivity during interglacials. This antiphasing persisted throughout the last 25 glacial cycles. Dust deposition became more pronounced across the Mid-Pleistocene Transition (MPT) in the Southern Hemisphere, with an abrupt shift suggesting more severe glaciations since ~0.9 Ma. Productivity was intermediate pre-MPT, lowest during the MPT and highest since 0.4 Ma. Generally, glacials experienced extended sea-ice cover, reduced bottom-water export and Weddell Gyre dynamics, which helped lower atmospheric CO2 levels.
    Keywords: Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP
    Type: Dataset
    Format: application/zip, 12 datasets
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  • 35
    facet.materialart.
    Unknown
    The ice mass balance and CT package data of the buoy unmanned ice station collected in Arctic Ocean during the MOSAiC expedition 2019/2020 (2022)
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    Details
    Publication Date: 2024-06-26
    Description: One unmanned ice station (UIS) has been deployed at the L3 site (85.13ºN, 135.68ºE) of the Distributed Network (DN) of the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) campaign on 10 October 2019. The UIS is a new prototype of IMB assembled by the Polar Research Institute of China, which consists of two separate units (ice and ocean) to measure physical parameters of the air-snow-sea ice-ocean system. For the ice unit, two acoustic sensors (Campbell SR50A and Teledyne-Benthos PSA916, respectively) are used to measure the relative changes in the position of the air/snow and ice/water interfaces. Thermistors (Maxim Integrated DS28EA00) mounted at 0.03 m spacing along a 4.5-m thermistor chain were used to measure temperature profiles. Air temperature and relative humidity (Vaisala HMP155A), as well as barometric pressure (Vaisala CS106), were measured at 1.5 m height above the initial snow surface. The UIS ocean unit (CT package) consisted of five conductivity & temperature sensors (RBR duo CT), one conductivity, and temperature & depth (pressure) sensor (RBR concerto CTD). The ocean unit were used to measure upper ocean at the depths of about 5-40 m, with the initial depths of 5.4, 10.4, 15.4, 20.4, 25.4, and 40.4 m. The ice and ocean units of UIS were deployed 10 m apart. The initial ice thickness and snow depth at the buoy deployment site were 1.53 and 0.15 m, respectively. The changes in ice thickness was determined using measurements by the underwater acoustic sounder. The measuring noise of the acoustic sounder has been removed. Since the acoustic sensor at the surface was invalid very soon after the deployment, the evolution of the air/snow interface was determined using the temperature profiles. Overall, the measurement accuracy was 0.1 K for temperature, 0.03 m for the snow or ice surface, and 0.01 m for the ice bottom, respectively. After the snow cover melted over, the negative values for the snow depth indicate the onset of ice surface melt. The changes in the depths of CT sensors were estimated based on their initial depths and the depth measured by the CTD at the bottom of CT package. The measurement of the UIS ice unit lasted until 15 June 2020 when the buoy drifted to 82.28°N; while the ocean unit lasted until 28 September 2020 and finally failed at 74.09°N.
    Keywords: AF-MOSAiC-1; AF-MOSAiC-1_100; Akademik Fedorov; Arctic Ocean; CT package; Mosaic; MOSAiC; MOSAiC20192020; MOSAiC20192020, AF122/1; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Polarstern; PS122/1_1-263; PS122/4; PS122/4_43-177; Sea ice mass balance; UnIS; Unmanned ice station; Unmanned Ice Station
    Type: Dataset
    Format: application/zip, 5 datasets
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  • 36
    facet.materialart.
    Unknown
    Processed data of CTD buoys 2019O1 to 2019O8 as part of the MOSAiC Distributed Network (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: A set of eight ice-tethered buoy systems (2019O1 to 2019O8) were deployed by the Akademik Fedorov in the Northern Laptev Sea in early October 2019 as part of the MOSAiC Distributed Network. Each buoy consisted of 5 Seabird SBE37IMP Microcat CTDs mounted along an inductive modem tether at depths of 10, 20, 50, 75 and 100m. The CTDs were recording oceanographic data internally at 2-minute intervals. The surface unit of the buoy prompted the instruments for an additional measurement every 10 minutes, which was then transmitted to a base station via iridium along with GPS position and time, as well as surface temperature. After a several months long drift through the Central Arctic Ocean, 4 out of 8 buoys were recovered in August 2020, and the internally recorded data from the CTDs were secured. The 10-minute buoy data and 2-minute CTD data were co-processed and merged into a combined product. A buoy flag indicates whether a measurement was taken by the buoy (1) or was recorded by the CTD itself (0). The data were quality controlled by means of outlier detection using global limits, moving average filters and manual inspection. The dataset was carefully checked for inconsistencies, especially in the salinity. A (slightly modified) quality flagging scheme was applied according to the Ocean Data Standards Volume 3 (UNESCO 2013), where 1 = Good, 2 = Good (Modified), 3 = Questionable, 4 = Bad, 9 = no data. Finally, the data were validated against independent measurements. Details are available in the data paper indicted below.
    Keywords: 2019O1; 2019O3; 2019O4; 2019O6; AF-MOSAiC-1; AF-MOSAiC-1_106; AF-MOSAiC-1_110; AF-MOSAiC-1_114; AF-MOSAiC-1_117; AF-MOSAiC-1_121; AF-MOSAiC-1_124; AF-MOSAiC-1_127; AF-MOSAiC-1_131; Akademik Fedorov; Akademik Tryoshnikov; Arctic Ocean; AT-MOSAiC-1; AT-MOSAiC-1_1; AT-MOSAiC-1_4; buoy; eddy; FRAM; FRontiers in Arctic marine Monitoring; mesoscale; mesoscale eddy; MIDO; MOSAiC; MOSAIC_PO; MOSAiC20192020; MOSAiC20192020, AF122/1; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Multidisciplinary Ice-based Distributed Observatory; North Greenland Sea; Ocean CTD buoy; oceanographic time series; oceanography; OCTDB; Polarstern; PS122/1_1-148, 2019O1; PS122/1_1-149, 2019O2; PS122/1_1-150, 2019O3; PS122/1_1-151, 2019O4; PS122/1_1-152, 2019O5; PS122/1_1-153, 2019O6; PS122/1_1-154, 2019O7; PS122/1_1-155, 2019O8; PS122/4; PS122/4_43-149; PS122/4_43-165; Transpolar Drift
    Type: Dataset
    Format: application/zip, 8 datasets
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  • 37
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    Temperature and heating induced temperature difference measurements from SIMBA-type sea ice mass balance buoy 2020T79, deployed during MOSAiC 2019/20 (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Temperature and heating-induced temperature differences were measured along a chain of thermistors. SIMBA 2020T79 (a.k.a. PRIC_10_07, IRIDIUM number 300234068527600) is an autonomous instrument that was installed on drifting sea ice in the Arctic Ocean during the 3rd leg of the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) in April 2020. The buoy was deployed at the new Met City of Central observatory with initial thicknesses of snow and ice of 0.32 and 2.82 m, respectively, on 16 April 2020. The thermistor chain was 5 m long and included 241 sensors with a regular spacing of 2 cm. The depths for the sensors are 66 to -412 cm, referring to the initial interface between snow and ice. The last sensor was used to measure the air temperature at 1 m above the initial snow surface. The resulting time series describes the evolution of temperature and temperature differences after two heating cycles of 30 and 120 s as a function of depth and time between 16 April 2020 and 31 July 2020 in sample intervals of 6 hours for temperature and 24 hours for temperature differences. In addition to temperature, geographic position, barometric pressure, tilt and compass were measured.
    Keywords: 2020T79; 2020T79, PRIC_10_07; Arctic Ocean; MOSAiC; MOSAiC20192020; MOSAiC-ICE; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Polarstern; PS122/3; PS122/3_28-92; PS122/4; PS122/4_43-155; SAMS Ice Mass Balance buoy; Sea ice mass balance; SIMBA; snow; Temperature
    Type: Dataset
    Format: application/zip, 4 datasets
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    DATA PANGAEA
  • 38
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    Tethered balloon-borne measurements of solar radiation during MOSAiC leg 4 in July 2020 (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: The tethered balloon system BELUGA (Balloon-bornE moduLar Utility for profilinG the lower Atmosphere) was operated during leg 4 of the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC). The balloon was operated from the Balloon Town site in the central observatory, close to RV Polarstern (Shupe et al., 2022). Balloon payload included an extended meteorological package, an ultrasonic anemometer package, a broadband radiation package, the video ice particle sampler, and the cubic aerosol measurement platform. An overview showing the value of the combined observation is displayed by Lonardi et al. (2022). The data processing is described in Pilz et al. (2023). The present dataset covers the solar irradiances measured by the broadband radiation package on 18 flights between 29 June and 27 July 2020.
    Keywords: ABL; AC3; Arctic; Arctic Amplification; Arctic Ocean; BELUGA; Broadband radiation; Mosaic; MOSAiC; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Polarstern; PS122/4; PS122/4_45-141; PS122/4_45-156; PS122/4_46-183; PS122/4_47-165; PS122/4_47-166; PS122/4_47-167; PS122/4_47-168; PS122/4_47-171; PS122/4_47-99; PS122/4_48-131; PS122/4_48-133; PS122/4_48-135; PS122/4_48-139; PS122/4_48-216; PS122/4_48-217; PS122/4_48-218; PS122/4_49-98; Radiation fluxes; solar radiation; Tethered balloon; Tethered balloon system BELUGA; vertical profile
    Type: Dataset
    Format: application/zip, 18 datasets
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    DATA PANGAEA
  • 39
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    Geochemistry of pore water and sediments from Wismar Bay (Germany), southern Baltic Sea (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Short sediment cores were taken at six stations in Wismar Bay, southern Baltic Sea (Germany) in May 2019 using a Rumohr-Lot device. Our aim in this study was to investigate the role of diagenetic element fluxes and different fresh water sources, including submarine groundwater discharge, on the water column in the bay. Porewaters were extracted from the sediment cores by applying the rhizon technique at a resolution between 2 and 5 cm. The porewaters were analyzed for major and trace metals and selected nutrients using a ICP-OES (iCAP, 7400, Duo Thermo Fischer Scientific), total sulphide by a Specord 40 spectrophotometer (Analytik Jena), dissolved inorganic carbon (DIC) and δ13CDIC using an isotope gas mass spectrometre (MAT 253) coupled to a Gasbench II, and δ18OH2O, and δ2HH2O using a CRDS system (laser cavity-ring-down-spectroscopy, Picarro L2140- I). Sediment cores were further sliced at 2 to 4 cm resolution and each freeze-dried solid subsample was analyzed for contents of total carbon, nitrogen, and sulphur using an Elemental Analyzer (Euro Vector EuroEA 3, 052), inorganic carbon using an Elemental Analyzer multi EA (Analytik Jena), total mercury by a DMA-80 analyzer, and HCl-extractable Pb, Mn and Fe using an ICP-OES (iCAP, 7400, Duo Thermo Fischer Scientific).
    Keywords: DAM sustainMare - MGF Baltic Sea: Exclusion of mobile bottom-contact fishing in marine protected areas of the German Exclusive Economic Zone of the Baltic Sea; MGF_Baltic_Sea; Research Mission of the German Marine Research Alliance (DAM): Protection and sustainable use of marine areas; southern Baltic Sea; Stable isotope; submarine groundwate discharge; sustainMare
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 40
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    Spectral radiation fluxes, albedo and transmittance from autonomous measurement from Radiation Station 2020R15, deployed during MOSAiC 2019/20 (2022)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2024-06-26
    Description: Solar radiation over and under sea ice was measured by radiation station 2020R15, an autonomous platform, installed on drifting First-Year-Ice (FYI) in the Arctic Ocean during MOSAiC (Leg 4) 2019/20. The resulting time series describes radiation measurements as a function of place and time between 13 July 2020 and 19 July 2020 in sample intervals of 3 hours. The radiation measurements have been performed with spectral radiometers. All data are given in full spectral resolution interpolated to 1.0 nm, and integrated over the entire wavelength range (broadband, total: 320 to 950 nm). Two sensors, solar irradiance and upward reflected solar irradiance, were mounted on a on a platform about 1 m above the sea ice surface. The third sensor was mounted 0.5 m underneath the sea ice measuring the downward transmitted irradiance. This buoy had no own GPS source. It was located at the Central Observertory (CO2) of MOSAiC. The drift track of CO2 is published here: Nicolaus, Marcel; Riemann-Campe, Kathrin; Bliss, Angela; Hutchings, Jennifer K; Granskog, Mats A; Haas, Christian; Hoppmann, Mario; Kanzow, Torsten; Krishfield, Richard A; Lei, Ruibo; Rex, Markus; Li, Tao; Rabe, Benjamin (2021): Drift trajectory of the Central Observatory 2 (CO2) of the Distributed Network of MOSAiC 2019/2020. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.937186
    Keywords: 2020R15; Arctic Ocean; autonomous platform; AWI_SeaIce; buoy; Current sea ice maps for Arctic and Antarctic; drift; meereisportal.de; MOSAiC; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Polarstern; PS122/4; PS122/4_43-119; RAD_S; Radiation Station; Sea Ice Physics @ AWI; solar radiation
    Type: Dataset
    Format: application/zip, 5 datasets
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  • 41
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    Rock and paleomagnetic data from two sediment cores from the Black Sea for the past 30 ka (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Rock magnetic and paleomagnetic results covering the past 30 ka were constructed from two sediment cores MSM33_856-1 (MSM33-55-1) and MSM33_855-1 (54-3) from the Black Sea. After the Mediterranean Sea water ingression, finely laminated organic-rich sapropelic sediments and coccolith oozes were deposited in the Black Sea since about 8.3 ka. Relict magnetic minerals in the Black Sea sarpoples are ferrous hemoilmenite, Fe-Mn and Fe-Cr spinels, and magnetite inclusions. In sediments deposited between about 14 and 8 ka, greigite and pyrite were formed in sediments because of the seawater penetration from overlying sediments after the seawater ingression. Before ~14 ka, the Black Sea sediments are dominated by detrital (titano-)magnetite minerals and the sporadically formed greigite which has SIRM/𝜅LF ratios 〉 10 kAm-2. By comparison with detrital (titano-)magnetite samples between 20-30 ka, we found that relict magnetic mineral samples between 0-8.3 ka have similar behavior in recording the geomagnetic field. Moreover, the geomagnetic field variations reconstructed from the Black Sea sapropels are comparable with other validated regional datasets for the past 8.3 ka. The natural remanent magnetization (NRM) and the anhysteretic remanent magnetization (ARM) were measured with a 2G Enterprises 755 SRM (cryogenic) long-core magnetometer equipped with a sample holder for eight discrete samples at a separation of 20 cm. The magnetometer's in-line tri-axial alternating field (AF) demagnetizer was used to demagnetize the NRM and ARM of the samples. The NRM was measured after application of AF peak amplitudes of 0, 5, 10, 15, 20, 30, 40, 50, 65, 80, and 100 mT. Directions of the characteristic remanent magnetization (ChRM) were determined by principle component analysis (PCA) according to Kirschvink (1980). The error range of the ChRM is given as the maximum angular deviation (MAD). The ARM was imparted along the samples' z-axis with a static field of 0.05 mT and an AF field of 100 mT. Demagnetization then was performed in steps of 0, 10, 20, 30, 40, 50, 65, and 80 mT. The median destructive field of the ARM (MDFARM) was determined to estimate the coercivity of the sediments. The slope of NRM versus ARM of common demagnetization steps was used to determine the relative paleointensity (RPI). In most cases, demagnetization steps from 20 to 65 mT were used to determine the RPI.
    Keywords: Baltic Sea Research Institute, Warnemünde; Black Sea; GeoForschungszentrum Potsdam; GFZ; Holocene; IOW; Paleomagnatic Secular Variation (PSV); rock magnetism
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 42
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    Quicklook plots for all data obtained from remotely operated vehicle (ROV) surveys during the MOSAiC expedition 2019/20 (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Quicklook plots for all data collected using a remotely operated vehicle (ROV) during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition between November 2019 and September 2020. The horizontal positions in the plots are only the pre-processed version and are not post-processed as described in the comments of the bibliography or as provided in the collection positioning and telemetry.
    Keywords: Arctic Ocean; AWI_SeaIce; BEAST; FRAM; FRontiers in Arctic marine Monitoring; MOSAiC; MOSAiC20192020; MOSAiC expedition; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Polarstern; PS122/1; PS122/1_10-113; PS122/1_5-62; PS122/1_6-118; PS122/1_6-16; PS122/1_6-31; PS122/1_7-18; PS122/1_7-55; PS122/1_8-125; PS122/1_9-22; PS122/2; PS122/2_18-10; PS122/2_18-19; PS122/2_18-89; PS122/2_19-115; PS122/2_19-27; PS122/2_20-101; PS122/2_20-23; PS122/2_21-125; PS122/2_21-36; PS122/2_22-107; PS122/2_22-45; PS122/2_23-116; PS122/2_23-29; PS122/2_24-70; PS122/2_24-97; PS122/2_25-104; PS122/2_25-44; PS122/3; PS122/3_29-14; PS122/3_29-65; PS122/3_30-69; PS122/3_31-17; PS122/3_31-75; PS122/3_32-11; PS122/3_32-33; PS122/3_32-34; PS122/3_32-78; PS122/3_33-27; PS122/3_33-83; PS122/3_34-20; PS122/3_35-32; PS122/3_35-95; PS122/3_36-112; PS122/3_36-125; PS122/3_36-24; PS122/3_37-108; PS122/3_37-19; PS122/3_37-20; PS122/3_38-50; PS122/3_38-85; PS122/3_38-91; PS122/3_39-111; PS122/3_39-152; PS122/3_39-20; PS122/3_39-77; PS122/4; PS122/4_44-162; PS122/4_44-191; PS122/4_44-206; PS122/4_45-129; PS122/4_45-149; PS122/4_45-61; PS122/4_46-172; PS122/4_46-174; PS122/4_46-175; PS122/4_46-176; PS122/4_46-177; PS122/4_46-37; PS122/4_47-135; PS122/4_47-31; PS122/4_48-213; PS122/4_48-4; PS122/4_49-105; PS122/5; PS122/5_59-269; PS122/5_59-369; PS122/5_60-165; PS122/5_60-166; PS122/5_60-167; PS122/5_60-28; PS122/5_60-5; PS122/5_61-156; PS122/5_61-200; PS122/5_61-35; PS122/5_62-103; PS122/5_62-165; PS122/5_62-65; Remotely operated sensor platform BEAST; Remotely operated vehicle (ROV); Sea ice; Sea Ice Physics @ AWI
    Type: Dataset
    Format: application/zip, 93 datasets
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  • 43
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    Absorbance and spectral absorption coefficient (SAC) parameters from remotely operated vehicle (ROV) surveys during the MOSAiC expedition 2019/20 (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Absorbance and spectral absorption coefficient (SAC) parameters as measured by a VIPER G2 spectral transmissometer (TriOS) mounted in the sensor skid of a remotely operated vehicle (ROV) during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition between November 2019 and September 2020. Data use manufacturer calibration. The path length was 250 mm and the wavelength range 360-750 nm. More technical details can be found here: https://www.trios.de/en/viper.html.
    Keywords: Arctic Ocean; attenuation coefficient; AWI_SeaIce; BEAST; FRAM; FRontiers in Arctic marine Monitoring; MOSAiC; MOSAiC20192020; MOSAiC expedition; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Polarstern; PS122/1; PS122/1_10-113; PS122/1_5-62; PS122/1_6-118; PS122/1_6-16; PS122/1_6-31; PS122/1_7-18; PS122/1_7-55; PS122/1_8-125; PS122/1_9-22; PS122/2; PS122/2_18-10; PS122/2_18-19; PS122/2_18-89; PS122/2_19-115; PS122/2_19-27; PS122/2_20-101; PS122/2_20-23; PS122/2_21-125; PS122/2_21-36; PS122/2_22-107; PS122/2_22-45; PS122/2_23-116; PS122/2_23-29; PS122/2_24-70; PS122/2_24-97; PS122/2_25-104; PS122/2_25-44; PS122/3; PS122/3_29-14; PS122/3_29-65; PS122/3_30-69; PS122/3_31-17; PS122/3_31-75; PS122/3_32-11; PS122/3_32-33; PS122/3_32-34; PS122/3_32-78; PS122/3_33-27; PS122/3_33-83; PS122/3_34-20; PS122/3_35-32; PS122/3_35-95; PS122/3_36-112; PS122/3_36-125; PS122/3_36-24; PS122/3_37-108; PS122/3_37-19; PS122/3_37-20; PS122/3_38-50; PS122/3_38-85; PS122/3_38-91; PS122/3_39-111; PS122/3_39-152; PS122/3_39-20; PS122/3_39-77; PS122/4; PS122/4_44-162; PS122/4_44-191; PS122/4_44-206; PS122/4_45-129; PS122/4_45-149; PS122/4_45-61; PS122/4_46-172; PS122/4_46-174; PS122/4_46-175; PS122/4_46-176; PS122/4_46-177; PS122/4_46-37; PS122/4_47-135; PS122/4_47-31; PS122/4_48-213; PS122/4_48-4; PS122/4_49-105; PS122/5; PS122/5_59-269; PS122/5_59-369; PS122/5_60-165; PS122/5_60-166; PS122/5_60-167; PS122/5_60-28; PS122/5_60-5; PS122/5_61-156; PS122/5_61-200; PS122/5_61-35; PS122/5_62-103; PS122/5_62-165; PS122/5_62-65; Remotely operated sensor platform BEAST; Remotely operated vehicle (ROV); Sea ice; Sea Ice Physics @ AWI
    Type: Dataset
    Format: application/zip, 92 datasets
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    DATA PANGAEA
  • 44
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    Total Sky Imager observations during POLARSTERN cruise PS122/4, Longyearbyen - Arctic Ocean (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: The dataset consist of camera shots of the sky. The camera - a total sky imager manufactured by Canon (Powershot) - was mounted at the top of the Research Vessel Polarstern. At the leg4 (from June until August 2020) of the MOSAIC experiment from Longyearbyen - Arctic Ocean this camera shots were taken with a temporal resolution between 1 minute and 16 seconds. The dataset represents the visible projection of weather conditions and cloud cover recorded on the vessel Polarstern in the direction near the zenith. These observations are useful for the interpretation of the atmospheric radiation measurements.
    Keywords: Arctic Ocean; ATMOBS; Atmospheric Observatory; MOSAiC; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; OCEANET; Polarstern; PS122/4; PS122/4_43-11; PS122/4_43-145; total sky image
    Type: Dataset
    Format: application/zip, 70 datasets
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    DATA PANGAEA
  • 45
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    Energy content measurements on Arctic zooplankton collected during MOSAiC (PS122) (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: This dataset contains energy content measurements performed on zooplankton collected in the Arctic Ocean during the MOSAiC expedition (PS122) from November 2019 untill September 2020. Energy content measurements were done on Apherusa glacialis, Themisto abyssorum, Chaetognatha, Thysanoessa longicaudata and Calanus hyperboreus. These species are all known prey of polar cod (Boreogadus saida), and their energy content was measured to be included in a bioenergetic model of the growth rate of this predator and to gain insight in the differences between prey species. The meaurements were performed on freeze-dried specimens using a 6725 semi-micro oxygen calorimeter (Parr, USA) connected to a 6772 calorimetric thermometer (Parr, USA).
    Keywords: Arctic; Arctic Ocean; BEAST; bomb-calorimetry; energy density; MOSAiC; MOSAiC_ECO; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Nansen closing net; NN; Polarstern; PS122/1; PS122/1_7-48; PS122/1_7-81; PS122/2; PS122/2_17-40; PS122/2_17-77; PS122/2_18-33; PS122/2_19-16; PS122/2_19-31; PS122/2_20-11; PS122/2_20-16; PS122/2_20-24; PS122/2_21-42; PS122/2_22-24; PS122/3; PS122/3_30-69; PS122/3_31-62; PS122/3_36-112; PS122/3_37-108; PS122/3_39-38; PS122/3_39-55; PS122/4; PS122/4_44-75; PS122/4_45-32; PS122/4_45-55; PS122/4_46-41; PS122/4_47-135; PS122/4_48-213; PS122/4_49-21; PS122/5; PS122/5_61-196; PS122/5_62-90; Remotely operated sensor platform BEAST; Ring net; RN; Zooplankton
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 46
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    Processed 1 minute scintillation measurements from POLARSTERN deck during the MOSAiC expedition with POLARSTERN to the Arctic (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: GNSS Raw Data (doi:10.1594/PANGAEA.956114) from board RV Polarstern during the MOSAiC expedition was processed with scintillation-processing software (see Kriegel et al, 2017). The result is stored in .ascii format and contains for each GNSS satellite in view general information such as C/No, Azimuth and Elevation Angle and basic scintillation measurements such as amplitude and phase scintillation index. Results are provided with 1 minute resolution.
    Keywords: Arctic Ocean; GNSS; GNSS Receiver; MOSAiC; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; North Greenland Sea; Polarstern; PS122/1; PS122/1_1-3; PS122/1_1-30; PS122/2; PS122/2_14-130; PS122/3; PS122/3_99-89; PS122/4; PS122/4_99-90; PS122/5; PS122/5_58-130
    Type: Dataset
    Format: application/zip, 5 datasets
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  • 47
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    Bulk mineral assemblage of sediment cores from Svalbard fjords determined via full pattern QXRD (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: The XRD data has been gained from pulverized and homogenized samples of every 5 cm by KOPRI personal at KOPRI and University of Tromsoe sampling parties. XRD raw measurements were run at Crystallography, Geosciences, University of Bremen in 2018-2020. Measurement conditions: Philips X'Pert Diffractometer, Cu radiation, fixed divergence, secoundary Ni filter, 3-85 ° 2theta, 0.0016° step size, 100 sec calculated step time. XRD mineral assemblage determination were subsequently gained through the QUAX full pattern quantitative determination software (see Vogt et al. 2002 at Pangaea methods wiki). The software allows for differentiation of all minerals. Here, the Fe-oxides and hydroxides were in the focus of the research manuscript. A QXRD investigation allows for not only identification of mineral content but also for detailing authigenic vs. allochthonous minerals, transport of detrital input to the sediment core and the interpretation of the transport processes and the local environment as well as the paleoceanographic reconstruction of the region. Sediment ages are given through the below mentioned data sets. A series of fjord surface sediments were collected from various Svalbard fjord systems during expeditions of RV Helmer Hanssen from UiT The Arctic University of Norway between 2012 and 2019 (Fig. 1). Four gravity cores were retrieved along a 150 km long N‒S transect from the continental shelf off northern Svalbard to the innermost Wijdefjorden: core HH17-1085-GC (hereafter 1085; 80.27°N, 16.21°E, 322 m water depth; continental shelf), HH17-1094-GC (hereafter 1094; 79.74°N, 15.42°E, 148 m water depth; fjord mouth), HH17-1100-GC (hereafter 1100; 79.30°N, 15.78°E, 112 m water depth; central fjord), and HH17-1106-GC (hereafter 1106; 79.00°N, 16.21°E, 160 m water depth; inner fjord)
    Keywords: Full Pattern Quantification with QUAX software; Holocene Research; Korean Polar Institute; Svalbard fjords; XRD
    Type: Dataset
    Format: application/zip, 6 datasets
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    DATA PANGAEA
  • 48
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    Hydrographic data from remotely operated vehicle (ROV) surveys during the MOSAiC expedition 2019/20 (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Conductivity, temperature, and pressure were measured by a Glider Payload CTD (SBE GPCTD, Seabird). Oxygen frequency was measured by an oxygen optode (SBE 43F DO, Seabird). Both instruments were mounted in the sensor skid of a remotely operated vehicle (ROV) during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition between November 2019 and September 2020. Data use manufacturer calibration. The Gibbs SeaWater (GSW) Oceanographic Toolbox of TEOS-10 was used to derive other hydrographic data. The conversion from oxygen frequency to dissolved oxygen concentration was performed using the OOI L2 data product DOCONCF (Vardaro, 2014).
    Keywords: Arctic Ocean; AWI_SeaIce; BEAST; FRAM; FRontiers in Arctic marine Monitoring; GPCTD; MOSAiC; MOSAiC20192020; MOSAiC expedition; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Polarstern; PS122/2; PS122/2_18-10; PS122/2_18-19; PS122/2_18-89; PS122/2_19-115; PS122/2_19-27; PS122/2_20-101; PS122/2_20-23; PS122/2_21-125; PS122/2_21-36; PS122/2_22-107; PS122/2_22-45; PS122/2_23-116; PS122/2_23-29; PS122/2_24-70; PS122/2_24-97; PS122/2_25-104; PS122/2_25-44; PS122/3; PS122/3_29-14; PS122/3_29-65; PS122/3_30-69; PS122/3_31-17; PS122/3_31-75; PS122/3_32-11; PS122/3_32-33; PS122/3_32-34; PS122/3_32-78; PS122/3_33-27; PS122/3_33-83; PS122/3_34-20; PS122/3_35-32; PS122/3_35-95; PS122/3_36-112; PS122/3_36-125; PS122/3_36-24; PS122/3_37-108; PS122/3_37-19; PS122/3_37-20; PS122/3_38-50; PS122/3_38-85; PS122/3_38-91; PS122/3_39-111; PS122/3_39-152; PS122/3_39-20; PS122/3_39-77; PS122/4; PS122/4_44-162; PS122/4_44-191; PS122/4_44-206; PS122/4_45-129; PS122/4_45-149; PS122/4_45-61; PS122/4_46-172; PS122/4_46-174; PS122/4_46-175; PS122/4_46-176; PS122/4_46-177; PS122/4_46-37; PS122/4_47-135; PS122/4_47-31; PS122/4_48-213; PS122/4_48-4; PS122/4_49-105; PS122/5; PS122/5_59-269; PS122/5_59-369; PS122/5_60-165; PS122/5_60-166; PS122/5_60-167; PS122/5_60-28; PS122/5_60-5; PS122/5_61-156; PS122/5_61-200; PS122/5_61-35; PS122/5_62-103; PS122/5_62-165; PS122/5_62-65; Remotely operated sensor platform BEAST; Remotely operated vehicle (ROV); Sea Ice Physics @ AWI
    Type: Dataset
    Format: application/zip, 84 datasets
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  • 49
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    Water/ice velocity from remotely operated vehicle (ROV) surveys during the MOSAiC expedition 2019/20 (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Water/ice velocity data and instrument status from a Nortek Aquadopp Profiler 2MHz acoustic doppler current profiler (ADCP) attached to a remotely operated vehicle (ROV) during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition between November 2019 and September 2020. The Aquadopp System Integrator Manual by Nortek AS can be found here: https://sensor.awi.de/rest/sensors/onlineResources/getOnlineResourcesFile/1764/system-integrator-manual_Mar2016.pdf
    Keywords: ADCP; Arctic Ocean; AWI_SeaIce; BEAST; FRAM; FRontiers in Arctic marine Monitoring; MOSAiC; MOSAiC20192020; MOSAiC expedition; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Polarstern; PS122/1; PS122/1_10-113; PS122/1_5-62; PS122/1_6-118; PS122/1_6-16; PS122/1_6-31; PS122/1_7-18; PS122/1_7-55; PS122/1_9-22; PS122/2; PS122/2_18-10; PS122/2_18-19; PS122/2_18-89; PS122/2_19-115; PS122/2_19-27; PS122/2_20-101; PS122/2_20-23; PS122/2_21-125; PS122/2_21-36; PS122/2_22-107; PS122/2_22-45; PS122/2_23-116; PS122/2_23-29; PS122/2_24-70; PS122/2_24-97; PS122/2_25-104; PS122/2_25-44; PS122/3; PS122/3_29-14; PS122/3_29-65; PS122/3_30-69; PS122/3_31-17; PS122/3_31-75; PS122/3_32-11; PS122/3_32-33; PS122/3_32-34; PS122/3_32-78; PS122/3_33-27; PS122/3_33-83; PS122/3_34-20; PS122/3_35-32; PS122/3_35-95; PS122/3_36-112; PS122/3_36-125; PS122/3_36-24; PS122/3_37-108; PS122/3_37-19; PS122/3_37-20; PS122/3_38-50; PS122/3_38-85; PS122/3_38-91; PS122/3_39-111; PS122/3_39-152; PS122/3_39-20; PS122/3_39-77; PS122/4; PS122/4_44-162; PS122/4_44-191; PS122/4_44-206; PS122/4_45-129; PS122/4_45-149; PS122/4_45-61; PS122/4_46-172; PS122/4_46-174; PS122/4_46-175; PS122/4_46-176; PS122/4_46-177; PS122/4_46-37; PS122/4_47-135; PS122/4_47-31; PS122/4_48-213; PS122/4_48-4; PS122/4_49-105; PS122/5; PS122/5_59-269; PS122/5_59-369; PS122/5_60-165; PS122/5_60-166; PS122/5_60-167; PS122/5_60-28; PS122/5_60-5; PS122/5_61-156; PS122/5_61-200; PS122/5_61-35; PS122/5_62-103; PS122/5_62-165; PS122/5_62-65; Remotely operated sensor platform BEAST; Remotely operated vehicle (ROV); Sea ice; Sea Ice Physics @ AWI
    Type: Dataset
    Format: application/zip, 184 datasets
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  • 50
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    Alkenone and TEX86 data for MIS 6 to 5 on the Brazilian Margin (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: We generated alkenone- and TEX86- based paleotemperature estimates for MIS 6-5 in core M125-55-7 (offshore Eastern Brazil) to text whether previously generated foraminiferal Mg/Ca SST are seasonaly biased. We find that alkenone and Mg/Ca-temperatures reflect annual mean SST with a transient winter bias of alkenone SST during MIS 5a-c. The winter-bias might relate to increased upwelling activity as indicated by higher abundances of G. bulloides. TEX86 temperatures (despite showing annual mean SST in core tops) deviate by up to 6°C to lower temperatures which we attribute to increased input of terrestrial GDGT during MIS 6 as indicated by an high BIT index and (ii) migration of the TEX86 producers to deeper levels within the water column following changes in vertical particle flux efficiency.
    Keywords: Alkenone; BIT index; foraminifera abundance; M125; M125_445-7; M125-55-7; Meteor (1986); PC; Piston corer; SAMBA; South Atlantic Ocean; TEX86
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 51
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    Temperature and heating induced temperature difference measurements from the sea ice mass balance buoy DTC16 during MOSAiC 2019/2020 (2023)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Temperature and heating-induced temperature were measured along a chain of thermistors. Digital Thermistor Chain DTC16 is an autonomous instrument that was installed on drifting sea ice in the Arctic Ocean during the MOSAiC expedition on 7 November 2019. The thermistor chain was 4.16 m long and included sensors with a regular spacing of 2 cm. The resulting time series describes the evolution of temperature during the heating cycle of 20 s and after the heating cycle during the following 40 s as a function of geographic position (GPS), depth, and time between 7 November 2019 and 27 April 2020 in sample intervals of 6 hours. It also contains manually estimated position of air-snow, snow-ice, and ice-water interfaces. The DTC was installed in deformed second-year ice next to the HSVA stress panels close to RV Polarstern.
    Keywords: Arctic Ocean; autonomous platform; buoy; CTC16; Digital thermistor chain; DTC; DTC16; Ice mass balance; MOSAiC; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Polarstern; PS122/1; PS122/1_1-119; PS122/2; PS122/2_14-101; PS122/4; PS122/4_47-151; Temperature
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 52
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    Centennial-scale evolution of Dansgaard-Oeschger events in sediment core MD95-2006 (2008)
    PANGAEA
    In:  Supplement to: Dickson, Alexander J; Austin, William EN; Hall, Ian R; Maslin, Mark; Kucera, Michal (2008): Centennial-scale evolution of Dansgaard-Oeschger events in the northeast Atlantic Ocean between 39.5 and 56.5 ka B.P. Paleoceanography, 23(3), PA3206, https://doi.org/10.1029/2008PA001595
    Details
    Publication Date: 2024-06-26
    Description: There is much uncertainty surrounding the mechanisms that forced the abrupt climate fluctuations found in many palaeoclimate records during Marine Isotope Stage (MIS)-3. One of the processes thought to be involved in these events is the Atlantic Meridional Overturning Circulation (MOC), which exhibited large changes in its dominant mode throughout the last glacial period. Giant piston core MD95-2006 from the northeast Atlantic Ocean records a suite of palaeoceanographic proxies related to the activity of both surface and deep water masses through a period of MIS-3 when abrupt climate fluctuations were extremely pronounced. A two-stage progression of surface water warming during interstadial warm events is proposed, with initial warming related to the northward advection of a thin warm surface layer within the North Atlantic Current, which only extended into deeper surface layers as the interstadial progressed. Benthic foraminifera isotope data also show millennial-scale oscillations but of a different structure to the abrupt surface water changes. These changes are argued to partly be related to the influence of low-salinity deepwater brines. The influence of deepwater brines over the site of MD95-2006 reached a maximum at times of rapid warming of surface waters. This observation supports the suggestion that brine formation may have helped to destabilize the accumulation of warm, saline surface waters at low latitudes, helping to force the MOC into a warm mode of operation. The contribution of deepwater brines relative to other mechanisms proposed to alter the state of the MOC needs to be examined further in future studies.
    Keywords: CALYPSO; Calypso Corer; IMAGES I; Marion Dufresne (1995); MD101; MD952006; MD95-2006
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 53
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    Bulk sediment parameter of surface sediment samples (Table 3) (1979)
    PANGAEA
    In:  Supplement to: Müller, Peter J; Suess, Erwin (1979): Productivity, sedimentation rate, and sedimentary organic matter in the oceans. I.- Organic matter preservation. Deep-Sea Research Part A. Oceanographic Research Papers, 26(12), 1347-1362, https://doi.org/10.1016/0198-0149(79)90003-7
    Details
    Publication Date: 2024-06-26
    Description: Comparison of rates of accumulation of organic carbon in surface marine sediments from the central North Pacific, the continental margins off northwest Africa, northwest and southwest America, the Argentine Basin, and the western Baltic Sea with primary production rates suggests that the fraction of primary produced organic carbon preserved in the sediments is universally related to the bulk sedimentation rate. Accordingly, less than 0.01% of the primary production becomes fossilized in slowly accumulating pelagic sediments [(2 to 6 mm (1000 y)**-1] of the Central Pacific, 0.1 to 2% in moderately rapidly accumulating [2 to 13 cm (1000 y)**-1] hemipelagic sediments off northwest Africa, northwest America (Oregon) and southeast America (Argentina), and 11 to 18% in rapidly accumulating [66 to 140 cm (1000 y)**-1] hemipelagic sediments off southwest America (Peru) and in the Baltic Sea. The emiprical expression: %Org-C = (0.0030*R*S**0.30)/(ps(1-Theta)) implies that the sedimentary organic carbon content (% Org-C) doubles with each 10-fold increase in sedimentation rate (S), assuming that other factors remain constant; i.e., primary production (R), porosity and sediment density (ps). This expression also predicts the sedimentary organic carbon content from the primary production rate, sedimentation rate, dry density of solids, and their porosity; it may be used to estimate paleoproductivity as well. Applying this relationship to a sediment core from the continental rise off northwest Africa (Spanish Sahara) suggests that productivity there during interglacial oxygen isotope stages 1 and 5 was about the same as today but was higher by a factor of 2 to 3 during glacial stages 2, 3, and 6.
    Keywords: 12897; 13939; 13947; Accumulation rate, total organic carbon; Atlantic Ocean; Baltic Sea; BC; BCR; Box corer; Box corer (Reineck); Calculated; Calculated, see reference(s); Calculated from mass/volume; Carbon, organic, total; Density, dry bulk; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; East Atlantic; Elevation of event; Event label; GIK10127-2; GIK10132-1; GIK10140-1; GIK10141-1; GIK10145-1; GIK10147-1; GIK10175-1; GIK12310-3; GIK12327-4; GIK12328-4; GIK12329-4; GIK12336-1; GIK12337-4; GIK12344-3; GIK12345-4; GIK12347-1; GIK12392-1; GIK13209-2; KAL; KAL15; Kasten corer; Kasten corer 15 cm; Latitude of event; Longitude of event; M12392-1; M25; Meteor (1964); Pacific; PC; Percentage; Peru Continental Margin; Piston corer; Porosity, fractional; Primary production of carbon per area, yearly; Sedimentation rate; V15; V15-141; V15-142; VA-05/4; VA-08/1; VA-10/3; Valdivia (1961); Vema; W7610B-08; W7706; W7706-36; W7706-39; Wecoma
    Type: Dataset
    Format: text/tab-separated-values, 234 data points
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  • 54
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    Pigments, TOC of Site ARA-4/97-B1 (2005)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: ARA-4/97; ARA-4/97-B1; Aranda (1989); Baltic Sea System Study; BASYS; Bornholm Basin, Baltic Sea; Carbon, organic, total; Chlorins a; Chlorophyll a per unit sediment mass; Chlorophyll b per unit sediment mass; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Event label; Gemini Niemistoe Corer; GNC; High Performance Liquid Chromatography (HPLC); Pheophorbide per unit sediment mass; Pheophytin a per unit sediment mass; Pheophytin b per unit sediment mass; Pyrochlorophyll a per unit sediment mass; Pyropheophytin a per unit sediment mass; Steryl chlorins a per unit sediment mass; Volumetric wet titration, Gaudette et al, 1974
    Type: Dataset
    Format: text/tab-separated-values, 132 data points
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  • 55
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    Organic carbon content of sediment core PS1173-6 (2005)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: ANT-II/3; AWI_Paleo; Carbon, organic, total; DEPTH, sediment/rock; Element analyser CHN, LECO; Giant box corer; GKG; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS04; PS04/260; PS1173-6; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 7 data points
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  • 56
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    Organic carbon content of sediment core PS1167-5 (2005)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: ANT-II/3; AWI_Paleo; Carbon, organic, total; DEPTH, sediment/rock; Element analyser CHN, LECO; Giant box corer; GKG; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS04; PS04/254; PS1167-5; South Orkney
    Type: Dataset
    Format: text/tab-separated-values, 7 data points
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  • 57
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    Organic carbon content of sediment core PS1178-4 (2005)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: ANT-II/3; AWI_Paleo; Carbon, organic, total; DEPTH, sediment/rock; Element analyser CHN, LECO; Giant box corer; GKG; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS04; PS04/265; PS1178-4; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 7 data points
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  • 58
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    Paleomagnetic measurements on sediment core PS2515-3 (2005)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: ANT-XI/2; AWI_Paleo; DEPTH, sediment/rock; Event label; KL; NRM, Declination after demagnetization; NRM, Inclination after demagnetization; NRM, Intensity after demagnetization; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Piston corer (BGR type); Polarstern; PS2515-3; PS28; PS28/378; Scotia Sea, southwest Atlantic; Single sample demagnetization
    Type: Dataset
    Format: text/tab-separated-values, 1440 data points
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  • 59
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    Bulk sediment parameter measured on surface sediment samples of Sites PS1230-1 to PS15/060 (2005)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: ARK-II/4; ARK-III/3; ARK-IV/3; ARK-VI/2; AWI_Paleo; Calcium carbonate; Calculated; Carbon, organic, total; Carbon/Nitrogen ratio; DEPTH, sediment/rock; Element analyser CHN; Elevation of event; Event label; Fram Strait; GeoB; Geosciences, University of Bremen; Giant box corer; GIK21289-1 PS07/578; GIK21290-3 PS07/579; GIK21291-3 PS07/581; GIK21292-3 PS07/582; GIK21293-3 PS07/583; GIK21294-3 PS07/584; GIK21295-3 PS07/586; GIK21296-3 PS07/587; GIK21297-3 PS07/588; GIK21298-3 PS07/590; GIK21300-3 PS07/592; GIK21301-2 PS07/593; GIK21302-2 PS07/594; GIK21303-2 PS07/595; GIK21304-2 PS07/596; GIK21305-1 PS07/597; GIK21306-2 PS07/598; GIK21307-2 PS07/599; GIK21308-3 PS07/601; GIK21309-3 PS07/602; GIK21310-4 PS07/603; GIK21311-3 PS07/605; GIK21312-3 PS07/606; GIK21313-3 PS07/607; GIK21314-3 PS07/608; GIK21315-3 PS07/610; GIK21316-5 PS07/612; GIK21318-4 PS07/615; GIK21319-2 PS07/617; GIK21535-5 PS11/430-5; GIK23230-1 PS05/416; GIK23231-2 PS05/417; GIK23232-1 PS05/418; GIK23233-1 PS05/420; GIK23235-1 PS05/422; GKG; Grain size, sieving; Grain size, sieving/settling tube; Kaolinite/Illite ratio; LATITUDE; LONGITUDE; Mass spectrometer Finnigan Delta-E; MULT; Multiple investigations; Opal, auto analysis (Müller & Schneider, 1993); Opal, biogenic silica; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS05; PS07; PS11; PS1230-1; PS1231-2; PS1232-1; PS1233-1; PS1235-1; PS1289-1; PS1290-3; PS1291-3; PS1292-3; PS1293-3; PS1294-3; PS1295-3; PS1296-3; PS1297-3; PS1298-3; PS1300-3; PS1301-2; PS1302-2; PS1303-2; PS1304-2; PS1305-1; PS1306-2; PS1307-2; PS1308-3; PS1309-3; PS1310-4; PS1311-3; PS1312-3; PS1313-3; PS1314-3; PS1315-3; PS1316-5; PS1318-4; PS1319-2; PS15; PS15/054; PS15/060; PS1535-5; Quaternary Environment of the Eurasian North; QUEEN; Sand; Silicon Cycling in the World Ocean; Silt; SINOPS; Size fraction 〈 0.002 mm, clay; Size fraction 〉 2 mm, gravel; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 315 data points
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  • 60
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    Content and accumulation of organic material in sediment core PS1294-4 (2005)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Accumulation rate, mass; Accumulation rate, total organic carbon; Age model; ARK-III/3; AWI_Paleo; Calculated; Calculated average/mean values; Calculated from mass/volume; Carbon, organic, total; Carbon/Nitrogen ratio; Color code HLS-system; DEPTH, sediment/rock; Element analyser CHN; Estimated; Foraminifera, planktic; Fram Strait; GIK21294-4 PS07/584; Grain size, sieving; Gravity corer (Kiel type); Mass spectrometer Finnigan Delta-E; Munsell Color System (1994); Nitrogen, total; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS07; PS1294-4; Quaternary Environment of the Eurasian North; QUEEN; Size fraction 〉 0.063 mm, sand; SL; Water content, wet mass; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 1673 data points
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  • 61
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    Content and accumulation of organic material in sediment core PS1290-4 (2005)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Accumulation rate, mass; Accumulation rate, total organic carbon; ARK-III/3; AWI_Paleo; Calculated; Calculated average/mean values; Calculated from mass/volume; Carbon, organic, total; Color code HLS-system; DEPTH, sediment/rock; Fram Strait; GIK21290-4 PS07/579; Gravity corer (Kiel type); Mass spectrometer Finnigan Delta-E; Munsell Color System (1994); Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS07; PS1290-4; Quaternary Environment of the Eurasian North; QUEEN; SL; Water content, wet mass
    Type: Dataset
    Format: text/tab-separated-values, 636 data points
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  • 62
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    Content and accumulation of organic material in sediment core PS1291-4 (2005)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Accumulation rate, mass; Accumulation rate, total organic carbon; ARK-III/3; AWI_Paleo; Calculated; Calculated average/mean values; Calculated from mass/volume; Carbon, organic, total; Color code HLS-system; DEPTH, sediment/rock; Fram Strait; GIK21291-4 PS07/581; Gravity corer (Kiel type); Mass spectrometer Finnigan Delta-E; Munsell Color System (1994); Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS07; PS1291-4; Quaternary Environment of the Eurasian North; QUEEN; SL; Water content, wet mass
    Type: Dataset
    Format: text/tab-separated-values, 588 data points
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  • 63
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    Content and accumulation of organic material in sediment core PS1297-4 (2005)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Accumulation rate, mass; Accumulation rate, total organic carbon; Age model; ARK-III/3; AWI_Paleo; Calculated; Calculated average/mean values; Calculated from mass/volume; Carbon, organic, total; Carbon/Nitrogen ratio; Color code HLS-system; DEPTH, sediment/rock; Element analyser CHN; Estimated; Foraminifera, planktic; Fram Strait; GIK21297-4 PS07/588; Grain size, sieving; Gravity corer (Kiel type); Mass spectrometer Finnigan Delta-E; Munsell Color System (1994); Nitrogen, total; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS07; PS1297-4; Quaternary Environment of the Eurasian North; QUEEN; Size fraction 〉 0.063 mm, sand; SL; Water content, wet mass; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 1495 data points
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  • 64
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    Content and accumulation of organic material in sediment core PS1310-5 (2005)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Accumulation rate, mass; Accumulation rate, total organic carbon; Age model; ARK-III/3; AWI_Paleo; Calculated; Calculated average/mean values; Calculated from mass/volume; Carbon, organic, total; Carbon/Nitrogen ratio; Color code HLS-system; DEPTH, sediment/rock; Element analyser CHN; Fram Strait; GIK21310-5 PS07/603; KL; Mass spectrometer Finnigan Delta-E; Munsell Color System (1994); Nitrogen, total; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Piston corer (BGR type); Polarstern; PS07; PS1310-5; Quaternary Environment of the Eurasian North; QUEEN; Water content, wet mass; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 2049 data points
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  • 65
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    Content and accumulation of organic material in sediment core PS1295-5 (2005)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Accumulation rate, mass; Accumulation rate, total organic carbon; Age model; ARK-III/3; AWI_Paleo; Calculated; Calculated average/mean values; Calculated from mass/volume; Carbon, organic, total; Carbon/Nitrogen ratio; Color code HLS-system; DEPTH, sediment/rock; Element analyser CHN; Estimated; Foraminifera, planktic; Fram Strait; GIK21295-5 PS07/586; Grain size, sieving; Gravity corer (Kiel type); Mass spectrometer Finnigan Delta-E; Munsell Color System (1994); Nitrogen, total; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS07; PS1295-5; Quaternary Environment of the Eurasian North; QUEEN; Size fraction 〉 0.063 mm, sand; SL; Water content, wet mass; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 1521 data points
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  • 66
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    Content and accumulation of organic material in sediment core PS1293-4 (2005)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Accumulation rate, mass; Accumulation rate, total organic carbon; ARK-III/3; AWI_Paleo; Calculated; Calculated average/mean values; Calculated from mass/volume; Carbon, organic, total; Carbon/Nitrogen ratio; Color code HLS-system; DEPTH, sediment/rock; Element analyser CHN; Estimated; Foraminifera, planktic; Fram Strait; GIK21293-4 PS07/583; Grain size, sieving; Gravity corer (Kiel type); Mass spectrometer Finnigan Delta-E; Munsell Color System (1994); Nitrogen, total; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS07; PS1293-4; Quaternary Environment of the Eurasian North; QUEEN; Size fraction 〉 0.063 mm, sand; SL; Water content, wet mass; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 1200 data points
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  • 67
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    TOC, CaCO3, C/N ratio, δ¹⁸O (N. pachyderma), age, age model of Site PS1290-4 (2005)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Age, dated; Age model; ARK-III/3; AWI_Paleo; Calcium carbonate; Calculated; Carbon, organic, total; Carbon/Nitrogen ratio; DEPTH, sediment/rock; Element analyser CHN; Fram Strait; GIK21290-4 PS07/579; Gravity corer (Kiel type); Mass spectrometer Finnigan MAT 251; Neogloboquadrina pachyderma sinistral, δ18O; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS07; PS1290-4; see reference(s); SL
    Type: Dataset
    Format: text/tab-separated-values, 474 data points
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  • 68
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    Stable isotopes and sedimentology of core GeoB1032 (2009)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Age model; Age model, SPECMAP chronology, Imbrie et al. (1984); Angola Basin; Calcium carbonate; Calculated; Calculated from mass/volume; Carbon, organic, total; Cibicidoides wuellerstorfi, δ13C; Cibicidoides wuellerstorfi, δ18O; Density, dry bulk; Depth, composite; DEPTH, sediment/rock; Element analyser CHN; Element analyser CHN, LECO; Event label; GeoB; GeoB1032-2; GeoB1032-3; Geosciences, University of Bremen; Giant box corer; GKG; Grain size, sieving/settling tube; Gravity corer (Kiel type); Intercore correlation; M6/6; Mass spectrometer Finnigan MAT 251; Meteor (1986); Sand; Sedimentation rate; SFB261; SL; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Walvis Ridge; Water content, wet mass
    Type: Dataset
    Format: text/tab-separated-values, 902 data points
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  • 69
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    Stable isotopes and sedimentology of core GeoB1041 (2009)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Age model; Age model, SPECMAP chronology, Imbrie et al. (1984); Angola Basin; Calculated; Calculated from mass/volume; Cibicidoides wuellerstorfi, δ13C; Cibicidoides wuellerstorfi, δ18O; Depth, composite; DEPTH, sediment/rock; Event label; GeoB; GeoB1041-1; GeoB1041-3; Geosciences, University of Bremen; Giant box corer; GKG; Grain size, sieving/settling tube; Gravity corer (Kiel type); Intercore correlation; M6/6; Mass spectrometer Finnigan MAT 251; Meteor (1986); Sand; Sedimentation rate; SFB261; SL; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Walvis Ridge; Water content, wet mass
    Type: Dataset
    Format: text/tab-separated-values, 1439 data points
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  • 70
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    Stable isotopes and sedimentology of core GeoB1034 (2009)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Age model; Age model, SPECMAP chronology, Imbrie et al. (1984); Angola Basin; Calcium carbonate; Calculated; Calculated from mass/volume; Carbon, organic, total; Cibicidoides wuellerstorfi, δ13C; Cibicidoides wuellerstorfi, δ18O; Density, dry bulk; Depth, composite; DEPTH, sediment/rock; Element analyser CHN; Element analyser CHN, LECO; Event label; GeoB; GeoB1034-1; GeoB1034-3; Geosciences, University of Bremen; Giant box corer; GKG; Grain size, sieving/settling tube; Gravity corer (Kiel type); Intercore correlation; M6/6; Mass spectrometer Finnigan MAT 251; Meteor (1986); Sand; Sedimentation rate; SFB261; SL; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Walvis Ridge; Water content, wet mass
    Type: Dataset
    Format: text/tab-separated-values, 1058 data points
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  • 71
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    Stable isotopes and sedimentology of coreGeoB1214 (2009)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Age model; Age model, SPECMAP chronology, Imbrie et al. (1984); Calcium carbonate; Calculated; Calculated from mass/volume; Cape Basin; Carbon, organic, total; Cibicidoides wuellerstorfi, δ13C; Cibicidoides wuellerstorfi, δ18O; Density, dry bulk; Depth, composite; DEPTH, sediment/rock; Element analyser CHN; Element analyser CHN, LECO; Event label; GeoB; GeoB1214-1; GeoB1214-2; Geosciences, University of Bremen; Giant box corer; GKG; Grain size, sieving/settling tube; Gravity corer (Kiel type); Intercore correlation; M12/1; Mass spectrometer Finnigan MAT 251; Meteor (1986); Sand; Sedimentation rate; SFB261; SL; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Water content, wet mass
    Type: Dataset
    Format: text/tab-separated-values, 886 data points
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  • 72
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    Stable isotopes and sedimentology of coreGeoB1211 (2009)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Keywords: Age model; Age model, SPECMAP chronology, Imbrie et al. (1984); Calcium carbonate; Calculated; Calculated from mass/volume; Cape Basin; Carbon, organic, total; Cibicidoides wuellerstorfi, δ13C; Cibicidoides wuellerstorfi, δ18O; Density, dry bulk; Depth, composite; DEPTH, sediment/rock; Element analyser CHN; Element analyser CHN, LECO; Event label; GeoB; GeoB1211-1; GeoB1211-3; Geosciences, University of Bremen; Giant box corer; GKG; Grain size, sieving/settling tube; Gravity corer (Kiel type); Intercore correlation; M12/1; Mass spectrometer Finnigan MAT 251; Meteor (1986); Sand; Sedimentation rate; SFB261; SL; South Atlantic in Late Quaternary: Reconstruction of Budget and Currents; Water content, wet mass
    Type: Dataset
    Format: text/tab-separated-values, 1440 data points
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  • 73
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    Susceptibility measured on 13 sediment cores from METEOR cruise M12/1 (2008)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Während der Meteor-Fahrt M12/1 wurden am gesamten gewonnenen Kernmaterial - Schwerelotkerne und Großkastengreifer - folgende sedimentphysikalischen Arbeiten durchgeführt: - Messung der Kompressionswellengeschwindigkeiten - Messung der magnetischen Suszeptibilität - Beprobungen für paläo- und gesteinsmagnetische Analysen Messung der magnetischen Suszeptibilität Wie in den vergangeneu Jahren wurden bereits an Bord die magnetischen Suszeptibilitäten der ganzen Kerne bestimmt. Es wurden sämtliche Schwerelotkerne sowie alle Stechrohre der Großkastengreifer mit einer Bartington Suszeptibilitätsmeßbrücke, Typ MS2.C, in Abständen von einem Zentimeter vermessen. Da nach den Erfahrungen früherer Fahrten im Arbeitsgebiet im allgemeinen sehr niedrige Meßwerte (0 bis 30*10-6 SI-Einheiten) zu erwarten waren, wurde dieses Jahr von Beginn an mit einer höheren Empfindlichkeit von 0,1*10-6 SI-Einheiten gemessen (früher 1,0*10-6 SI-Einheiten). Bei dieser Genauigkeit steigt allerdings die Meßzeit um einen Faktor 10 und der zeitliche Gerätegang ist nicht mehr zu vernachlässigen. Aus diesem Grunde wurde generell nach jeweils 10 Meßwerten eine Messung mit leerer Sonde durchgeführt und der dabei ermittelte Gang linear interpoliert zur Recluktion der Kernmeßpunkte verwendet.
    Keywords: Cape Basin; GeoB; GeoB1203-3; GeoB1204-4; GeoB1207-3; GeoB1208-2; GeoB1209-2; GeoB1210-2; GeoB1211-3; GeoB1212-1; GeoB1213-3; GeoB1214-1; GeoB1216-1; GeoB1217-2; GeoB1219-1; Geosciences, University of Bremen; Gravity corer (Kiel type); M12/1; Meteor (1986); SL; Walvis Ridge
    Type: Dataset
    Format: application/zip, 13 datasets
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  • 74
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    Physical properties measured on 45 sediment cores from METEOR cruise M41/1 (2008)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: The complete sediment series recovered with the gravity corer during METEOR cruise M 41/1 were subjected to laboratory geophysical studies. Shipboard measurements on the segmented cores routinely comprised three basic physical parameters: - compressional (p-) wave velocity vp, - electric resistivity Rs (as a measure of density and porosity), - magnetic volume susceptibility K. These properties are closely related to lithology and grain-size of the sediments and provide high-resolution core logs (spacing 1 cm for p-wave velocity, 3 cm for electric resistivity and magnetic volume susceptibility) available prior to all other detailed investigations. In addition, oriented samples for subsequent shore based rock and paleomagnetic studies were taken at typically 10 cm intervals.
    Keywords: Eastern Niger fan; GeoB; GeoB4901-8; GeoB4902-3; GeoB4904-4; GeoB4905-4; GeoB4906-3; GeoB4907-3; GeoB4908-2; GeoB4909-5; GeoB4910-2; GeoB4911-3; GeoB4912-2; GeoB4913-5; GeoB4913-6; GeoB4915-4; GeoB4917-8; GeoB4918-5; Geosciences, University of Bremen; Gravity corer (Kiel type); M41/1; Meteor (1986); northern Congo fan; off Angola; off Cameroon; off Gabun; off northern Gabun; off south Gabun; SL
    Type: Dataset
    Format: application/zip, 45 datasets
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  • 75
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    Stable isotopes in opal in the Southern Ocean (2008)
    PANGAEA
    In:  Supplement to: Jacot des Combes, Hélène; Esper, Oliver; De La Rocha, Christina L; Abelmann, Andrea; Gersonde, Rainer; Yam, Ruth; Shemesh, Aldo (2008): Diatom d13C, d15N, and C/N since the Last Glacial Maximum in the Southern Ocean: Potential impact of species composition. Paleoceanography, 23(4), PA4209, https://doi.org/10.1029/2008PA001589
    Details
    Publication Date: 2024-06-26
    Description: Measurements of delta 13C, delta 15N, and C/N on diatom-bound organic matter were made over the Holocene and Last Glacial Maximum (LGM) from 3 piston cores in the Southern Ocean, one from each of the three sectors. The site in the Scotia Sea differed considerably from the other two sites by having markedly lower delta 13C, more variable delta 15N and C/N ratios, and a sedimentary diatom assemblage that was never dominated by Fragilariopsis kerguelensis. Although environmental parameters certainly have a strong impact on the isotope ratios, delta 13C is also correlated to the proportion of F. kerguelensis in the 3 cores investigate here (r**2 = 0.8). Extreme values of delta 13C, delta 15N, and C/N at the Last Glacial Maximum were also related to the abundance of winter stages of Eucampia antarctica. These results suggest that diatom specific isotope records should be interpreted in conjunction with information on the species composition of the samples.
    Keywords: ANT-VIII/3; ANT-XI/4; ANT-XVIII/5a; AWI_Paleo; Conrad Rise; Gravity corer (Kiel type); KL; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Piston corer (BGR type); Polarstern; PS16; PS16/372; PS1786-1; PS2606-6; PS30; PS30/144; PS58; PS58/271-1; SL; Southeast Pacific; South Sandwich Trough
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 76
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    Organic carbon and nitrogen concentrations on vertical profiles in waters of the North Atlantic in June-July 1996 (2008)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Not filtered water samples were taken in 10 ml ampoules (sealed immediately after being acidified with phosphoric acid to pH〈2, sampling), or 40 ml screw-lid vials, and measured onboard at sampling or next days, or frozen (-20°C) until being acidified and measured in home labs. Carbon measurement was by high-temperature catalytic oxydation in a 10 cm column packed with 5% Pt on aluminum oxide beads at 900°C in a stream of oxygen, and CO2 detection by infrared extinction after the removal of moisture and SO2 by appropriate traps (cold trap, Mg-percarbonate, Na-pyrophosphate, tin, bronze or Sulfix). The apparatus was the dual channel Dimatek 2000 equipped with a Binos 200 detector. Nitrogen was measured by chemoluminescence detection of NO2 in the combustion gases after leaving the Binos detector in one of the two channels of the setup. Most measurements of samples containing high nitrate were discarded, when data were inconsistent. The nature of nitrate interference is not clear.
    Keywords: CTD/Rosette; CTD-RO; M36/2; M36/2-CTD-178_002; M36/2-CTD-179_009; M36/2-CTD-180_011; M36/2-CTD-181_013; M36/2-CTD-183_016; M36/2-CTD-184_018; M36/2-CTD-186_020; M36/2-CTD-188_028; M36/2-CTD-189_030; M36/2-CTD-190_032; M36/2-CTD-193_038; M36/2-CTD-194_040; Meteor (1986)
    Type: Dataset
    Format: application/zip, 12 datasets
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  • 77
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    Organic carbon and nitrogen concentrations on vertical profiles in waters of the Baltic Sea in February-March 1995 (2008)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Not filtered water samples were taken in 10 ml ampoules (sealed immediately after being acidified with phosphoric acid to pH〈2, sampling), or 40 ml screw-lid vials, and measured onboard at sampling or next days, or frozen (-20°C) until being acidified and measured in home labs. Carbon measurement was by high-temperature catalytic oxydation in a 10 cm column packed with 5% Pt on aluminum oxide beads at 900°C in a stream of oxygen, and CO2 detection by infrared extinction after the removal of moisture and SO2 by appropriate traps (cold trap, Mg-percarbonate, Na-pyrophosphate, tin, bronze or Sulfix). The apparatus was the dual channel Dimatek 2000 equipped with a Binos 200 detector. Nitrogen was measured by chemoluminescence detection of NO2 in the combustion gases after leaving the Binos detector in one of the two channels of the setup. Most measurements of samples containing high nitrate were discarded, when data were inconsistent. The nature of nitrate interference is not clear.
    Keywords: AL79A; AL79A_BY38; AL79A_F1; AL79A_F10; AL79A_F11; AL79A_F14; AL79A_F19; AL79A_F2; AL79A_F20; AL79A_F22; AL79A_F23; AL79A_F3; AL79A_F4; AL79A_F5; AL79A_F7; AL79A_F8; AL79A_F9; AL79A_S21; Alkor (1990); Baltic Sea; Bottle, Niskin 10-L; NIS_10L
    Type: Dataset
    Format: application/zip, 17 datasets
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  • 78
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    High-resolution sediment record from a submarine meandering canyon system in the eastern Atlantic (2008)
    PANGAEA
    In:  Supplement to: Zühlsdorff, Christine; Hanebuth, Till J J; Henrich, Rüdiger (2008): Persistent quasi-periodic turbidite activity off Saharan Africa and its comparability to orbital and climate cyclicities. Geo-Marine Letters, 28(2), 87-95, https://doi.org/10.1007/s00367-007-0092-0
    Details
    Publication Date: 2024-06-26
    Description: Based on a high-resolution sediment record from a submarine meandering canyon system offshore the present-day hyperarid Saharan Africa, two phases of turbidity-current activity can be distinguished during the past 13,000 years. Frequent, siliciclastic turbidity currents can be related to deglacial sea-level history, whereas rhythmically recurring fine-grained and carbonate-rich turbidity currents with recurrence times of roughly 900 years are inferred for the Holocene. Various trigger mechanisms can be considered to initiate turbidity currents, but only a few can explain a periodic turbidite activity. A comparison of Holocene turbidite recurrence times and basic cycles of 900 and 1,800 years found in various Holocene paleoclimate studies suggests that a previously unrecognized climate-related coupling may be active.
    Keywords: Center for Marine Environmental Sciences; GeoB8509-2; Gravity corer (Kiel type); M58/1; MARUM; Meteor (1986); SL
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    Format: application/zip, 4 datasets
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  • 79
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    Relative abundance and opal input of radiolarians measured on sediment core PS1768-8 and PS2498-1 (2009)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: We present a new proxy, the oxygen isotope measurements (d18O) of radiolarian opal from sediment cores in the Subantarctic Zone (SAZ) and Permanent Open Ocean Zone (POOZ) of the Atlantic Southern Ocean. The SAZ core records of radiolarian and foraminiferal d18O are well correlated. In the POOZ core, only radiolarian 18O shifts to distinctly lower values during the glacial (when this core was in the Sea Ice Zone (SIZ)), while relevant foraminiferal and diatomaceous d18O records exhibit no such shift. This suggests a seasonal salinity change derived from the melting of snow accumulated on sea ice. We propose that a northward relocation of the Southern Ocean zonal system and enhanced water-vapor transport from lower latitudes forced the development of a stratified sea-surface in the northern SIZ during late glacial spring time. This raises unexpected aspects for numerical modeling of past atmospheric coupling and moisture transport, as well as on glacial Southern Ocean stratification and its implication for ocean/atmosphere gas exchange, water mass generation and productivity.
    Keywords: ANT-VIII/3; ANT-XI/2; AWI_Paleo; Gravity corer (Kiel type); Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS16; PS16/311; PS1768-8; PS2498-1; PS28; PS28/304; Shona Ridge; SL; South Atlantic
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 80
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    Concentrations and accumulation rates of chemical elements and sediment components in sediments of central equatorial Pacific, DSDP data (1979)
    PANGAEA
    In:  Supplement to: Leinen, Margaret W; Stakes, Debra S (1979): Metal accumulation rates in the central equatorial Pacific during Cenozoic time. Geological Society of America Bulletin, 90(4), 357-375, https://doi.org/10.1130/0016-7606(1979)90%3C357:MARITC%3E2.0.CO;2
    Details
    Publication Date: 2024-06-26
    Description: Accumulation rates of Mg, Al, Si, Mn, Fe, Ni, Cu, Zn, opal, and calcium carbonate have been calculated from their concentrations in samples from equatorial Deep Sea Drilling Project sites. Maps of element accumulation rates and of Q-mode factors derived from raw data indicate that the flux of trace metals to equatorial Pacific sediments has varied markedly through time and space in response to changes in the relative and absolute influence of several depositional influences: biogenic, detrital, authigenic, and hydrothermal sedimentation. Biologically derived material dominates the sediment of the equatorial Pacific. The distributions of Cu and Zn are most influenced by surface-water biological activity, but Ni, Al, Fe, and Mn are also incorporated into biological material. All of these elements have equatorial accumulation maxima similar to those of opal and calcium carbonate at times during the past 50 m.y. Detritus distributed by trade winds and equatorial surface circulation contributes Al, non-biogenic Si, Fe, and Mg to the region. Detrital sediment is most important in areas with a small supply of biogenic debris and low bulk-accumulation rates. Al accumulation generally increases toward the north and east, indicating its continental source and distribution by the northeast trade winds. Maxima in biological productivity during middle Eocene and latest Miocene to early Pliocene time and concomitant well-developed surface circulation contributed toward temporal maxima in the accumulation rates of Cu, Zn, Ni, and Al in sediments of those ages. Authigenic material is also important only where bulk-sediment accumulation rates are low. Ni, Cu, Zn, and sometimes Mn are associated with this sediment. Fe is almost entirely of hydrothermal origin. Mn is primarily hydrothermal, but some is probably scavenged from sea water by amorphous iron hydroxide floes along with other elements concentrated in hydrothermal sediments, Ni, Cu, and Zn. During the past 50 m.y. all of these elements accumulated over the East Pacific Rise at rates nearly an order of magnitude higher than those at non-rise-crest sites. In addition, factor analysis indicates that some of this material is carried substantial distances to the west of the rise crest. Accumulation rates of Fe in basal metalliferous sediments indicate that the hydrothermal activity that supplied amorphous Fe oxides to the East Pacific Rise areas was most intense during middle Eocene and late Miocene to early Pliocene time.
    Keywords: 16-159; 16-160; 16-161; 16-162; 16-163; 5-42; 8-69; 8-70; 8-71; 8-72; 8-73; 8-74; 8-75; 9-77; 9-78; 9-79; 9-80; 9-81; 9-82; 9-83; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg16; Leg5; Leg8; Leg9; North Pacific; North Pacific/BASIN; North Pacific/CONT RISE; North Pacific/HILL; North Pacific/PLAIN; North Pacific/VALLEY; South Pacific; South Pacific/BASIN; South Pacific/CONT RISE; South Pacific/VALLEY
    Type: Dataset
    Format: application/zip, 41 datasets
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  • 81
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    Late Cenozoic stable isotope record of benthic and planktonic foraminifera from the Pacific Ocean (1979)
    PANGAEA
    In:  Supplement to: Keigwin, Lloyd D (1979): Late Cenozoic stable isotope stratigraphy and paleoceanography of DSDP sites from the east equatorial and central north Pacific Ocean. Earth and Planetary Science Letters, 45(2), 361-382, https://doi.org/10.1016/0012-821X(79)90137-7
    Details
    Publication Date: 2024-06-26
    Description: Stable isotopic analyses of Middle Miocene to Quaternary foraminiferal calcite from east equatorial and central north Pacific DSDP cores have provided much new informatlon on the paleoceanography of the Pacific Neogene The history of delta18O change in planktonic foraminifera reflects the changing Isotopic composition and temperature of seawater at the time of test formation. Changes in the isotopic composition of benthonic foraminifera largely reflect changes m the volume of continental ice. Isotopic data from these cores indicates the following sequence of events related to continental glaciation (1) A permanent Antarctic ice sheet developed late in the Middle Miocene (about 13 to 11.5 m.y. ago) (2) The Late Miocene (about 11.5 to 5 m.y. ago) is marked by significant variation in delta18O of about 0.5‰ throughout, indicating instability of Antarctic ice cap size or bottom-water temperatures (3) The early Pliocene (5 to about 3 m.y. ago) was a time of relative stability in ice volume and bottom-water temperature (4) Growth of permanent Northern Hemisphere ice sheets is referred to have begun about 3 m.y. ago (5) The late Pliocene (3 to about 1.8 m.y. ago) is marked by one major glaciation or bottom-water cooling dated between about 2.1 to 2.3 m.y. (6) There is some evidence that the frequency of glacial-interglacial cycles increased at about 0.9 m.y. There is significant variation in delta13C at these sites but no geochemical interpretation is offered in this paper. The most outstanding feature of delta13C results is a permanent shift of about -0.8‰ found at about 6.5 m.y. in east equatorial and central north Pacific benthonic foraminifera. This benthonic carbon shift may form a useful marker in deep-sea cores recovering Late Miocene carbonates.
    Keywords: 16-157; 16-158; 32-310; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg16; Leg32; North Pacific/CONT RISE; North Pacific/RIDGE; South Pacific/RIDGE
    Type: Dataset
    Format: application/zip, 5 datasets
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  • 82
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    Clay mineralogy and shear strength of subglacial and glaciomarine sediments in the southern Bellingshausen Sea (2009)
    PANGAEA
    In:  Supplement to: Hillenbrand, Claus-Dieter; Ehrmann, Werner; Larter, Robert D; Benetti, Sara; Dowdeswell, Julian A; Ó Cofaigh, Colm; Graham, Alastair G C; Grobe, Hannes (2009): Clay mineral provenance of sediments in the southern Bellingshausen Sea reveals drainage changes of the West Antarctic Ice Sheet during the Late Quaternary. Marine Geology, 265(1-2), 1-18, https://doi.org/10.1016/j.margeo.2009.06.009
    Details
    Publication Date: 2024-06-26
    Description: The Belgica Trough and the adjacent Belgica Trough Mouth Fan in the southern Bellingshausen Sea (Pacific sector of the Southern Ocean) mark the location of a major outlet for the West Antarctic Ice Sheet during the Late Quaternary. The drainage basin of an ice stream that advanced through Belgica Trough across the shelf during the last glacial period comprised an area exceeding 200,000 km**2 in the West Antarctic hinterland. Previous studies, mainly based on marine-geophysical data from the continental shelf and slope, focused on the bathymetry and seafloor bedforms, and the reconstruction of associated depositional processes and ice- drainage patterns. In contrast, there was only sparse information from seabed sediments recovered by coring. In this paper, we present lithological and clay mineralogical data of 21 sediment cores collected from the shelf and slope of the southern Bellingshausen Sea. Most cores recovered three lithological units, which can be attributed to facies types deposited under glacial, transitional and seasonally open-marine conditions. The clay mineral assemblages document coinciding changes in provenance. The relationship between the clay mineral assemblages in the subglacial and proglacial sediments on the shelf and the glacial diamictons on the slope confirms that a grounded ice stream advanced through Belgica Trough to the shelf break during the past, thereby depositing detritus eroded in the West Antarctic hinterland as soft till on the shelf and as glaciogenic debris flows on the slope. The thinness of the transitional and seasonally open-marine sediments in the cores suggests that this ice advance occurred during the last glacial period. Clay mineralogical, acoustic sub-bottom and seismic data furthermore demonstrate that the palaeo-ice stream probably reworked old sedimentary strata, including older tills, on the shelf and incorporated this debris into its till bed. The geographical heterogeneity of the clay mineral assemblages in the sub- and proglacial diamictons and gravelly deposits indicates that they were eroded from underlying sedimentary strata of different ages. These strata may have been deposited during either different phases of the last glacial period or different glacial and interglacial periods. Additionally, the clay mineralogical heterogeneity of the soft tills recovered on the shelf suggests that the drainage area of the palaeo-ice stream flowing through Belgica Trough changed through time.
    Keywords: ANT-XI/3; AWI_Paleo; BC; BC351 CORE_NO 351; BC356 CORE_NO 356; BC361 CORE_NO 361; BC363 CORE_NO 363; BC364 CORE_NO 364; BC369 CORE_NO 369; BC373 CORE_NO 373; BC379 CORE_NO 379; Bellingshausen Sea; Bellingshausen Sea, bank west of channel on TMF; Bellingshausen Sea, central axis of trough, middle shelf; Bellingshausen Sea, central axis of trough, outer shelf; Bellingshausen Sea, deep part of trough in Eltanin Bay; Bellingshausen Sea, eastern bank of mini trough, outer shelf; Bellingshausen Sea, part of trough exiting Carroll Inlet; MSGL/drumlins trend 335¡; Bellingshausen Sea, ridge-groove province: flattish groove; Bellingshausen Sea, ridge-groove province: ridge; Bellingshausen Sea, shallow part of trough in Eltanin Bay; Bellingshausen Sea, slope on TMF; Bellingshausen Sea, small escarpment at shelf break; Bellingshausen Sea, steep slope east of TMF; Bellingshausen Sea, till sheet on N side of Ronne Entrance Trough; Bellingshausen Sea, till sheet on shelf N of Smyley Island; Bellingshausen Sea, toe of eastern bank of mini trough, outer shelf; Bellingshausen Sea, upper slope on Trough Mouth Fan (TMF); Bellingshausen Sea, western flank of trough, middle shelf; Box corer; GC; GC352 CORE_NO 352; GC357 CORE_NO 357; GC358 CORE_NO 358; GC359 CORE_NO 359; GC360 CORE_NO 360; GC362 CORE_NO 362; GC365 CORE_NO 365; GC366 CORE_NO 366; GC368 CORE_NO 368; GC370 CORE_NO 370; GC371 CORE_NO 371; GC372 CORE_NO 372; GC374 CORE_NO 374; GC378 CORE_NO 378; GC380 CORE_NO 380; GC381 CORE_NO 381; Giant box corer; GKG; Gravity corer; Gravity corer (Kiel type); James Clark Ross; JR104; JR104-BC351; JR104-BC356; JR104-BC361; JR104-BC363; JR104-BC364; JR104-BC369; JR104-BC373; JR104-BC379; JR104-GC352; JR104-GC357; JR104-GC358; JR104-GC359; JR104-GC360; JR104-GC362; JR104-GC365; JR104-GC366; JR104-GC368; JR104-GC370; JR104-GC371; JR104-GC372; JR104-GC374; JR104-GC378; JR104-GC380; JR104-GC381; JR20040123; MUC; MultiCorer; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; PS2526-1; PS2527-1; PS2528-1; PS2529-1; PS2531-1; PS2532-2; PS2533-1; PS2533-2; PS2537-1; PS2538-1; PS2538-2; PS2539-2; PS2540-1; PS2540-3; PS2541-2; PS2542-1; PS2542-2; PS2543-1; PS2543-3; PS29; PS29/018; PS29/021; PS29/022; PS29/024; PS29/033; PS29/039; PS29/040; PS29/045; PS29/046; PS29/047; PS29/048; PS29/049; PS29/050; PS29/051; SL; SPP1158
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    Format: application/zip, 67 datasets
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  • 83
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    Benthic foraminifera, stable isotope ratios and carbon concentrations of sediment cores from Propeller Mound and Porcupine Srabight (2007)
    PANGAEA
    In:  Supplement to: Rüggeberg, Andres; Dullo, Wolf-Christian; Dorschel, Boris; Hebbeln, Dierk (2007): Environmental changes and growth history of a cold-water carbonate mound (Propeller Mound, Porcupine Seabight). International Journal of Earth Sciences, 96(1), 57-72, https://doi.org/10.1007/s00531-005-0504-1
    Details
    Publication Date: 2024-06-26
    Description: On- and off-mound sediment cores from Propeller Mound (Hovland Mound province, Porcupine Seabight) were analysed to understand better the evolution of a carbonate mound. The evaluation of benthic foraminiferal assemblages from the off-mound position helps to determine the changes of the environmental controls on Propeller Mound in glacial and interglacial times. Two different assemblages describe the Holocene and Marine Isotope Stage (MIS) 2 and late MIS 3 (~31 kyr BP). The different assemblages are related to changes in oceanographic conditions, surface productivity and the waxing and waning of the British Irish Ice Sheet (BIIS) during the last glacial stages. The interglacial assemblage is related to a higher supply of organic material and stronger current intensities in water depth of recent coral growth. During the last glaciation the benthic faunas showed high abundances of cassidulinid species, implying cold bottom waters and a reduced availability of organic matter. High sedimentation rates and the domination of Elphidium excavatum point to shelf erosion related to sea-level lowering (~50 m) and the progradation of the BIIS onto the shelf. A different assemblage described for the on-mound core is dominated by Discanomalina coronata, Gavelinopsis translucens, Planulina ariminensis, Cibicides lobatulus and to a lower degree by Hyrrokkin sarcophaga. These species are only found or show significantly higher relative abundances in on-mound samples and their maximum contribution in the lower part of the record indicates a higher coral growth density on Propeller Mound in an earlier period. They are less abundant during the Holocene, however. This dataset portrays the boundary conditions of the habitable range for the cold-water coral Lophelia pertusa, which dominates the deep-water reefal ecosystem on the upper flanks of Propeller Mound. The growth of this ecosystem occurs during interglacial and interstadial periods, whereas a retreat of corals is documented in the absence of glacial sediments on-mound. Glacial conditions with cold intermediate waters, a weak current regime and high sedimentation rates provide an unfavourable environmental setting for Lophelia corals to grow. A Late Pleistocene decrease is observed in the mound growth for Propeller Mound, which might face its complete burial in the future, as it already happened to the buried mounds of the Magellan Mound province further north.
    Keywords: Center for Marine Environmental Sciences; ECOMOUND; Environmental controls on mound formation along the european margin; GeoB6725-1; GeoB6730-1; Gravity corer (Kiel type); MARUM; Porcupine Seabight; POS265; POS485-1; POS490-1; Poseidon; SL
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 84
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    Mg/Ca ratios of Globigerinoides ruber of sediment core GeoB4905-4 (2005)
    PANGAEA
    In:  Supplement to: Weldeab, Syee; Schneider, Ralph R; Kölling, Martin; Wefer, Gerold (2005): Holocene African droughts relate to eastern equatorial Atlantic cooling. Geology, 33(12), 981-984, https://doi.org/10.1130/G21874.1
    Details
    Publication Date: 2024-06-26
    Description: Here we present evidence that the Holocene African monsoon system (AMS) varied in response to the eastern equatorial Atlantic sea-surface temperature (SST). Several short-term episodes of decreased moisture availability as a result of low eastern equatorial Atlantic SST are suggested by planktonic foraminiferal Mg/Ca ratios. These episodes promoted a weakening of the AMS and thus determined the timing and intensity of arid periods. Local sea-surface salinities also reveal regional patterns of precipitation in equatorial western Africa. The high eastern equatorial Atlantic SSTs occur in concert with seasonally increased insolation at low latitudes, suggesting a strong response of African monsoonal precipitation to oceanic conditions at low latitudes.
    Keywords: Center for Marine Environmental Sciences; GeoB; GeoB4905-4; Geosciences, University of Bremen; Gravity corer (Kiel type); M41/1; MARUM; Meteor (1986); off Cameroon; SL
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 85
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    Lipids and nitrogen isotopes of deep-water corals (2005)
    PANGAEA
    In:  Supplement to: Kiriakoulakis, Kostas; Fisher, Elizabeth; Wolff, George A; Freiwald, André; Grehan, Anthony J; Roberts, J Murray (2005): Lipids and nitrogen isotopes of two deep-water corals from the North-East Atlantic: initial results and implications for their nutrition. In: Freiwald, A, Roberts, JM (eds.), Cold-Water Corals and Ecosystems, Springer Berlin Heidelberg, Berlin, Heidelberg, 715-729, https://doi.org/10.1007/3-540-27673-4_37
    Details
    Publication Date: 2024-06-26
    Description: The lipid and organic nitrogen isotopic (delta15N) compositions of two common deep-water corals (Lophelia pertusa and Madrepora oculata) collected from selected locations of the NE Atlantic are compared to the composition of suspended particulate organic matter, in order to determine their principle food source. Initial results suggest that they may feed primarily on zooplankton. This is based on the increased abundances of mono-unsaturated fatty acids and alcohols and the different ratios of the polyunsaturated fatty acids, 22:6/20:5 of the corals when compared to those of the suspended particulate organic matter. There is enrichment in L. pertusa of mono-unsaturated fatty acids and of delta15N relative to M. oculata. It is unclear whether this reflects different feeding strategies or assimilation/storage efficiencies of zooplankton tissue or different metabolism in the two coral species.
    Keywords: ACES; Atlantic Coral Ecosystem Study; BC; Belgica Mounds; Beryl_Alpha; Box corer; Cork Harbour; D248; D248_13823#12; D248_13823#8; D248_13825#1; D248_13828#1; D248_13831#1; D248_13832#2; D248_13841#1; D248_13874#2; D248_13881#3; Darwin Mound; Darwin Mounds; Discovery (1962); Dredge_4; Dredge, triangle; ECOMOUND; Environmental controls on mound formation along the european margin; GeoB6710-1; GeoB6713-1; GeoB6732-1; GeoB6742-1; GeoB8029-1; GeoB8036-1; GeoB8042-1; GeoB8044-1; GeoB8048-1; GeoB8068-1; GeoB8076-1; GeoB8078-1; GeoB8081-1; GeoB8103-1; GeoB8106-1; GeoB8107-1; Limfjorden; Logachev Mounds; M2000_BX01#32; M2000_BX02#50; M2000_BX11#3; M2000_BX13#34; M2000_BX21#51; North Sea; Norwegian fjord; Norwegian shelf; Osterfjord; Pelagia Mounds; Porcupine Seabight; POS265; POS292; POS470-1; POS473-1; POS492-1; POS502-1; POS552-1; POS559-1; POS565-1; POS567-1; POS571-1; POS591-1; POS599-1; POS601-1; POS604-1; POS626-1; POS629-1; POS630-1; Poseidon; Remote operated vehicle; ROV; S98-467_; SAPS; SAPS1; SAPS2; SAPS4; Scheldt Delta Estuary; Scraper trawl; Stand-alone pumps; STRAWL; TAD; Television-Grab; TRAWL; Trawl net; TVG; Wyville Thomson Ridge
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 86
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    Biogenic particle and biomarker flux from a mooring time-series at AWI HAUSGARTEN (2009)
    PANGAEA
    In:  Supplement to: Bauerfeind, Eduard; Nöthig, Eva-Maria; Beszczynska, Agnieszka; Fahl, Kirsten; Kaleschke, Lars; Kreker, Kathrin; Klages, Michael; Soltwedel, Thomas; Lorenzen, Christiane; Wegner, Jan (2009): Particle sedimentation patterns in the eastern Fram Strait during 2000-2005: Results from the Arctic long-term observatory HAUSGARTEN. Deep Sea Research Part I: Oceanographic Research Papers, 56(9), 1471-1487, https://doi.org/10.1016/j.dsr.2009.04.011
    Details
    Publication Date: 2024-06-26
    Description: Since 2000 long-term measurements of vertical particle flux have been performed with moored sediment traps at the long-term observatory HAUSGARTEN in the eastern Fram Strait (79°N/4°E). The study area, which is seasonally covered with ice, is located in the confluence zone of the northward flowing warm saline Atlantic water with cold, low salinity water masses of Arctic origin. Current projections suggest that this area is particularly vulnerable to global warming. Total matter fluxes and components thereof (carbonate, particulate organic carbon and nitrogen, biogenic silica, biomarkers) revealed a bimodal seasonal pattern showing elevated sedimentation rates during May/June and August/September. Annual total matter flux (dry weight, DW) at ~ 300 m depth varied between 13 and 32 g/m**2/a during 2000 and 2005. Of this total flux 6-13 % was due to CaCO3, 4-21 % to refractory particulate organic carbon (POC), and 3-8 % to biogenic particulate silica (bPSi). The annual flux of all biogenic components together was almost constant during the period studied (8.5-8.8 g/m**2/a), although this varied from 27 to 67 % of the total annual flux. The fraction was lowest in a year characterized by the longest duration of ice coverage (91 and 70 days for the calendar year and summer season, May-September, respectively). Biomarker analyses revealed that organic matter originating from marine sources was present in excess of terrigenious material in the sedimented matter throughout most of the study period. Fluxes of recognizable phyto- and protozooplankton cells amounted up to 60x106 m**2/d. Diatoms and coccolithophorids were the most abundant organisms. Diatoms, mainly pennate species, dominated during the first years of the investigation. A shift in the composition occurred during the last year when numbers of diatoms declined considerably, leading to a dominance of coccolithoporids. This was also reflected in a decrease in the sedimentation of bPSi. The sedimentation of biogenic matter, however, did not differ from the amount observed during the previous years. Among the larger organisms, pteropods at times contributed significantly to both the total matter and CaCO3, fluxes.
    Keywords: ARK-XVI/2; ARK-XVII/1; ARK-XVIII/1; ARK-XX/1; AWI_Paleo; FEVI1; FEVI2; FEVI3; FEVI4; FEVI7; Hausgarten; HERMES; Hotspot Ecosystem Research on the Margins of European Seas; Long-term Investigation at AWI-Hausgarten off Svalbard; Mooring (long time); MOORY; North Greenland Sea; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS57; PS57/273-1, HGIV; PS59; PS59/101-1, HGIV; PS62; PS62/179-2, HGIV; PS66; PS66/129-1, HGIV
    Type: Dataset
    Format: application/zip, 10 datasets
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  • 87
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    Uranium in marine basalts (1977)
    PANGAEA
    In:  Supplement to: MacDougall, J Douglas (1977): Uranium in marine basalts: Concentration, distribution and implications. Earth and Planetary Science Letters, 35(1), 65-70, https://doi.org/10.1016/0012-821X(77)90029-2
    Details
    Publication Date: 2024-06-26
    Description: The uranium content of glass from chilled margins of oceanic tholeiitic basalt flows is generally 〈0.1 ppm, even for old samples with highly altered crystalline interiors. Such low values represent the original whole rock concentrations, although subsequent to eruption low-temperature weathering has added uranium, and other elements, to the crystalline portions of these basalts. Consideration of the K/U ratios of altered samples suggests that basalt weathering may provide the major oceanic sink for these two elements.
    Keywords: 16-163; 18-177A; 2-10; 22-211; 22-213; 22-215; 23-220; 24-231; 24-236; 24-238; 25-240; 34-319; 34-320; 5-32; 5-36; 5-37; 5-39; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Indian Ocean//BASIN; Indian Ocean//FRACTURE ZONE; Indian Ocean/Arabian Sea/HILL; Indian Ocean/Gulf of Aden/BASIN; Leg16; Leg18; Leg2; Leg22; Leg23; Leg24; Leg25; Leg34; Leg5; North Atlantic/CONT RISE; North Pacific/CONT RISE; North Pacific/HILL; North Pacific/PLAIN; North Pacific/RIDGE; South Pacific/BASIN
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 88
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    Unknown
    Sea surface temperature reconstruction of sediment core GeoB6518-1 (2005)
    PANGAEA
    In:  Supplement to: Schefuß, Enno; Schouten, Stefan; Schneider, Ralph R (2005): Climatic controls on central African hydrology during the last 20,000 years. Nature, 437, 1003-1006, https://doi.org/10.1038/nature03945
    Details
    Publication Date: 2024-06-26
    Description: Past hydrological changes in Africa have been linked to various climatic processes, depending on region and timescale. Long-term precipitation changes in the regions of northern and southern Africa influenced by the monsoons are thought to have been governed by precessional variations in summer insolation (Kutzbach and Liu, 1997, doi:10.1126/science.278.5337.440; Partridge et al., 1997, doi:10.1016/S0277-3791(97)00005-X). Conversely, short-term precipitation changes in the northern African tropics have been linked to North Atlantic sea surface temperature anomalies, affecting the northward extension of the Intertropical Convergence Zone and its associated rainbelt (Hastenrath, 1990, doi:10.1002/joc.3370100504, Street-Perrott and Perrott, 1990, doi:10.1038/343607a0). Our knowledge of large-scale hydrological changes in equatorial Africa and their forcing factors is, however, limited (Gasse, 2000, doi:10.1016/S0277-3791(99)00061-X). Here we analyse the isotopic composition of terrigenous plant lipids, extracted from a marine sediment core close to the Congo River mouth, in order to reconstruct past central African rainfall variations and compare this record to sea surface temperature changes in the South Atlantic Ocean. We find that central African precipitation during the past 20,000 years was mainly controlled by the difference in sea surface temperatures between the tropics and subtropics of the South Atlantic Ocean, whereas we find no evidence that changes in the position of the Intertropical Convergence Zone had a significant influence on the overall moisture availability in central Africa. We conclude that changes in ocean circulation, and hence sea surface temperature patterns, were important in modulating atmospheric moisture transport onto the central African continent.
    Keywords: Center for Marine Environmental Sciences; Congo Fan; GeoB6518-1; Gravity corer (Kiel type); M47/3; MARUM; Meteor (1986); SL
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    Format: application/zip, 2 datasets
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  • 89
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    Pteropod preservation on the Pakistan shelf and continental slope (2005)
    PANGAEA
    In:  Supplement to: Klöcker, Ralph; Henrich, Rüdiger (2005): Recent and Late Quaternary pteropod preservation on the Pakistan shelf and continental slope. Marine Geology, 231(1-4), 103-112, https://doi.org/10.1016/j.margeo.2006.05.014
    Details
    Publication Date: 2024-06-26
    Description: Fifteen surface sediment samples from the Pakistan shelf and upper continental slope and a Late Quaternary high-sedimentation rate core (573 m water depth, Pakistan continental margin) have been analysed to improve the understanding of the factors influencing pteropod preservation. The aragonite compensation depth (ACD) is located at 250–400 m water depth, which corroborates previous observations of a very shallow ACD in the northern Arabian Sea. With the exception of the Hab transect off Karachi, the ACD coincides with the upper boundary of the OMZ located at 250 m water depth. The shell preservation index of the pteropod Limacina inflata (LDX) was applied on six surface sediment samples showing good to very good preservation (LDX: 2.2 to 1.3). The 30 000 yr long record of sediment core SO90 137KA is characterized by alternations between bioturbated and laminated sediments. Bioturbated sediments occurring in the Early Holocene, Younger Dryas and time-equivalents of Heinrich events contain well to perfectly preserved tests of L. inflata (LDX: 2.1–0.2), whereas only traces of pteropods are found in laminated intervals. The close linkage of pteropod preservation in the surface sediments and in core 137KA to well-oxygenated conditions can be explained by repetitive intermediate water formation in the Arabian Sea down to at least 600 m water depth in times of enhanced NE monsoons during stadials and H-equivalents. Low amounts of pteropods in laminated sediments (interstadials, Late Holocene) and in the present-day oxygen minimum zone (OMZ) indicate a weak NE monsoon, stable OMZ and shallow ACD.
    Keywords: Arabian Sea; BC; BCR; Box corer; Box corer (Reineck); Center for Marine Environmental Sciences; KAL; Kasten corer; MAKRAN 2; MARUM; PAKOMIN; SO130; SO130_238KG; SO130_255KG; SO130_260KG; SO130_264KG; SO90; SO90_113KG; SO90_120KG; SO90_124KG; SO90_129KG; SO90_135KG; SO90_137KA; SO90_180KG; SO90_18KG; SO90_35KG; SO90_42KG; SO90_44KG; SO90_66KG; Sonne
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 90
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    Living benthic foraminifera of the western and southern Arabian Sea (2006)
    PANGAEA
    In:  Supplement to: Heinz, Petra; Hemleben, Christoph (2006): Foraminiferal response to the Northeast Monsoon in the western and southern Arabian Sea. Marine Micropaleontology, 58(2), 103-113, https://doi.org/10.1016/j.marmicro.2005.10.001
    Details
    Publication Date: 2024-06-26
    Description: Sediments from the western and southern part of the Arabian Sea were collected periodically in the spring intermonsoon between March and May 1997 and additionally at the end of the Northeast Monsoon in February 1998. Assemblages of Rose Bengal stained, living deep-sea benthic foraminifera, their densities, vertical distribution pattern, and diversity were analysed after the Northeast Monsoon and short-time changes were recorded. In the western Arabian Sea, foraminiferal numbers increased steadily between March and the beginning of May, especially in the smaller size classes (30-63 µm, 63-125 µm). At the same time, the deepening of the foraminiferal living horizon, variable diversity and rapid variations between dominant foraminiferal communities were observed. We interpret these observations as the time-dependent response of benthic foraminifera to enhanced organic carbon fluxes during and after the Northeast Monsoon. In the southern Arabian Sea, constant low foraminiferal abundances during time, no distinctive change in the vertical distribution, reduced diversity, and more stable foraminiferal communities were noticed, which indicates no or little influence of the Northeast Monsoon to benthic foraminifera in this region.
    Keywords: 19#4; 2#2; 23/25; 24/03; 32; 4#2; 7/30; 7#4; Arabian Sea; BIGSET; BIGSET-1; BIGSET-2/JGOFS-IN-4; Biogeochemical Fluxes of Matter and Energy in the Deep Sea; JGOFS-IN-1; JGOFS-IN-2; MUC; MultiCorer; SO117; SO117_MC464; SO117_MC468; SO117_MC469; SO118; SO118_MC-02; SO118_MC-04; SO119; SO119_MC501; SO129; SO129_MC-03; SO129_MC-09; SO129_MC-14; Sonne; Southern Arabian Sediment Trap; Western Arabian Sediment Trap; Western Arabian Sediment Trap-Kuppe; Western Arabian Sediment Trap Plain; Western Arabian Sediment Trap Top
    Type: Dataset
    Format: application/zip, 52 datasets
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  • 91
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    Barium in sediments off northwest Africa (2006)
    PANGAEA
    In:  Supplement to: Plewa, Kerstin; Meggers, Helge; Kasten, Sabine (2006): Barium in sediments off NW Africa: A tracer for paleoproductivity or meltwater events? Paleoceanography, 21(2), PA2015, https://doi.org/10.1029/2005PA001136
    Details
    Publication Date: 2024-06-26
    Description: High-resolution down-core analyses of the solid phase content of total barium (Batot) and total organic carbon (TOC) back to 25 kyr B.P. were performed on a gravity core from the upper continental slope off Cape Yubi (Morocco). The observed discrepancy between the two potential paleoproductivity proxies, Batot and TOC, initiated supplementary examinations of the pore water, the geochemistry of the clay fraction, X-ray diffraction analyses, and the application of a sequential Ba extraction method of selected samples. Additionally, we analyzed down-core samples of the planktonic foraminifera Turborotalita quinqueloba and Globorotalia inflata for their Ba/Ca ratios. These analyses, which were performed for the first time on these species, were used to reconstruct past oceanic Ba concentrations. We suggest that in the study area, which is characterized by high accumulation rates, the preserved TOC content is a valuable proxy for past primary productivity, whereas the solid phase Batot contents appear to be affected by other mechanisms and factors. Peaks of total barium content in the clay fraction and of Ba/Ca ratios in the planktonic foraminifera shells found during the Younger Dryas and the Heinrich 1 event are likely to result from increased meltwater influx into the northern North Atlantic. We suggest that Ba-enriched meltwater was transmitted by the eastern boundary current system from higher latitudes to the region of the Canary Islands. Total barium contents of the clay fraction (Batot,clay) and Ba/Ca in planktonic foraminifera shells seem to be reliable proxies for this discharge of meltwater.
    Keywords: 273; Center for Marine Environmental Sciences; GeoB; GeoB5546-2; GeoB8613-6; Geosciences, University of Bremen; Gravity corer (Kiel type); KL; M42/4b; M58/2; MARUM; Meteor (1986); off Northwest Africa; Piston corer (BGR type); SL
    Type: Dataset
    Format: application/zip, 7 datasets
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  • 92
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    Profile of sediment echo sounding with links to ParaSound data files and swath sonar multibeam bathymetry during METEOR cruise M70/2b (2009)
    PANGAEA
    In:  Supplement to: Dupré, S; Buffet, G; Mascle, Jean; Foucher, Jean Paul; Gauger, Steffen; Boetius, Antje; Marfia, C; AsterX AUV Team; Quest ROV Team; BIONIL Scientific Party (2009): High-resolution mapping of large gas emitting mud volcanoes on the Egyptian continental margin (Nile Deep Sea Fan) by AUV surveys. Marine Geophysical Research, 29(4), 275-290, https://doi.org/10.1007/s11001-009-9063-3
    Details
    Publication Date: 2024-06-26
    Description: Two highly active mud volcanoes located in 990-1,265 m water depths were mapped on the northern Egyptian continental slope during the BIONIL expedition of R/V Meteor in October 2006. High-resolution swath bathymetry and backscatter imagery were acquired with an autonomous underwater vehicle (AUV)-mounted multibeam echosounder, operating at a frequency of 200 kHz. Data allowed for the construction of ~1 m pixel bathymetry and backscatter maps. The newly produced maps provide details of the seabed morphology and texture, and insights into the formation of the two mud volcanoes. They also contain key indicators on the distribution of seepage and its tectonic control. The acquisition of high-resolution seafloor bathymetry and acoustic imagery maps with an AUV-mounted multibeam echosounder fills the gap in spatial scale between conventional multibeam data collected from a surface vessel and in situ video observations made from a manned submersible or a remotely operating vehicle.
    Keywords: BIONIL; CT; M70/2a; M70/2a-track; M70/2b; M70/2b-track; MEDIFLUX; Mediterranean Sea; Meteor (1986); Processes at the Passive Continental Margins; Underway cruise track measurements
    Type: Dataset
    Format: application/zip, 5 datasets
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  • 93
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    Geochemical and physical sediment properties of sediment cores from the Portuguese shelf (2009)
    PANGAEA
    In:  Supplement to: Alt-Epping, Ulrich (2008): Late Quaternary sedimentation processes and sediment accumulation changes off Portugal. PhD Thesis, Elektronische Dissertationen an der Staats- und Universitätsbibliothek Bremen, Germany, urn:nbn:de:gbv:46-diss000111503
    Details
    Publication Date: 2024-06-26
    Description: Marine sediments from the Portuguese shelf are influenced by environmental changes in the surrounding continental and marine environment. These are largely controlled by the North Atlantic Oscillation, but additional impacts may arise from episodic tsunamis. In order to investigate these influences, a high resolution multi-proxy study has been carried out on a 5.4 m long gravity core and five box cores from the Tagus prodelta on the western Portuguese margin, incorporating geochemical (Corg/Ntotal ratios, d13Corg, d15N, d18O, Corg and CaCO3 content) and physical sediment properties (magnetic susceptibility, grain-size). Subsurface data of the five box cores indicate no major effect of early postdepositional alteration. Surface data show a higher fraction of terrigenous organic material close to the river mouth and in the southern prodelta. Gravity core GeoB 8903 covers the last 3.2 kyrs with a temporal resolution of at least 0.1 cm/yr. Very high sedimentation rates between 69 and 140 cm core depth indicate a possible disturbance of the record by the AD1755 tsunami, although no evidence for a disturbance is observed in the data. Sea surface temperature and salinity on the prodelta, the local budget of marine NO3- as well as the provenance of organic matter remained virtually constant during the past 3.2 kyrs. A positive correlation between magnetic susceptibility (MS) and North Atlantic Oscillation (NAO) is evident for the past 250 years, coinciding with a negative correlation between mean grain-size and NAO. This is assigned to a constant riverine supply of fine material with high MS, which is diluted by the riverine input of a coarser, low-MS component during NAO negative, high-precipitation phases. End-member modelling of the lithic grain-size spectrum supports this, revealing a third, coarse lithic component. The high abundance of this coarse end-member prior to 2 kyr BP is interpreted as the result of stronger bottom currents, concentrating the coarse sediment fraction by winnowing. As continental climate was more arid prior to 2 kyr BP (Subboreal), the coarse end-member may also consist of dust from local sources. A decrease in grain-size and CaCO3 content after 2 kyr BP is interpreted as a result of decreasing wind strength. The onset of a fining trend and a further decrease in CaCO3 around AD900 occurs simultaneous to climatic variations, reconstructed from eastern North Atlantic records. A strong increase in MS between AD1400 and AD1500 indicates higher lithic terrigenous input, caused by deforestation in the hinterland.
    Keywords: 819; Andromeda; BC; Box corer; BOXT01; BOXT14; BOXT21; BOXT23; BOXT25; Center for Marine Environmental Sciences; GeoB8903-1; Gravity corer (Kiel type); MARUM; Ocean Margin Exchange Project; OMEX; PLUTUR6; PLUTUR6_BOXT01; PLUTUR6_BOXT14; PLUTUR6_BOXT21; PLUTUR6_BOXT23; PLUTUR6_BOXT25; POS304; Poseidon; Shelf off Tagos & Sado rivers; SL
    Type: Dataset
    Format: application/zip, 13 datasets
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  • 94
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    Pollen analysis of sediment cores from the mouth of the river Congo to Walvis Bay and Lüderitz (2007)
    PANGAEA
    In:  Supplement to: Dupont, Lydie M; Behling, Hermann; Jahns, Susanne; Marret, Fabienne; Kim, Jung-Hyun (2007): Variability in glacial and Holocene marine pollen records offshore from west southern Africa. Vegetation History and Archaeobotany, 16, 87-100, https://doi.org/10.1007/s00334-006-0080-8
    Details
    Publication Date: 2024-06-26
    Description: The distribution of pollen in marine sediments is used to record vegetation changes over the past 30,000 years on the adjacent continent. A transect of marine pollen sequences from the mouth of the river Congo (~5°S) to Walvis Bay and Lüderitz (~25°S) shows vegetation changes in Congo, Angola and Namibia from the last glacial period into the Holocene. The comparison of pollen records from different latitudes provides information about the latitudinal shift of open forest and savannahs (Poaceae pollen), the extension of lowland forest (rain forest pollen) and Afromontane forest (Podocarpus pollen), and the position of the desert fringe (pollen of Caryophyllaceae, Chenopodiaceae and Amaranthaceae). High Cyperaceae pollen percentages in sediments from the last glacial period off the mouth of the river Congo suggest the presence of open swamps rather than savannah vegetation in the Congo Basin. Pollen from Restionaceae in combination with Stoebe-type pollen (probably from Elytropappus) indicates a possible northwards extension of winter rain vegetation during the last glacial period. The record of Rhizophora (mangrove) pollen is linked to erosion of the continental shelf and sea-level rise. Pollen influx is highest off river mouths (10-2000 grains year**-1 cm**-2), close to the coast (300-6000 grains year**-1 cm**-2), but is an order of magnitude lower at sites situated far from the continent (〈10 grains year**-1 cm**-2).
    Keywords: 175-1079A; 175-1084A; Benguela Current, South Atlantic Ocean; Center for Marine Environmental Sciences; Congo Fan; DRILL; Drilling/drill rig; GeoB6518-1; Gravity corer (Kiel type); Joides Resolution; Leg175; M47/3; MARUM; Meteor (1986); Ocean Drilling Program; ODP; SL
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 95
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    Geochemical composition and crystallization conditions of melts from the Mid Atlantic Ridge near Ascension Island (7-11°S) (2009)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Phase equilibria simulations were performed on naturally quenched basaltic glasses to determine crystallization conditions prior to eruption of magmas at the Mid-Atlantic Ridge (MAR) east of Ascension Island (7°11°S).The results indicate that midocean ridge basalt (MORB) magmas beneath different segments of the MAR have crystallized over a wide range of pressures (100-900MPa). However, each segment seems to have a specific crystallization history. Nearly isobaric crystallization conditions (100-300MPa) were obtained for the geochemically enriched MORB magmas of the central segments, whereas normal (N)-MORB magmas of the bounding segments are characterized by polybaric crystallization conditions (200-900MPa). In addition, our results demonstrate close to anhydrous crystallization conditions of N-MORBs, whereas geochemically enriched MORBs were successfully modeled in the presence of 0.4-1wt% H2O in the parental melts.These estimates are in agreement with direct (Fourier transform IR) measurements of H2O abundances in basaltic glasses and melt inclusions for selected samples. Water contents determined in the parental melts are in the range 0.04-0.09 and 0.30-0.55 wt% H2O for depleted and enriched MORBs, respectively. Our results are in general agreement (within ±200MPa) with previous approaches used to evaluate pressure estimates in MORB. However, the determination of pre-eruptive conditions of MORBs, including temperature and water content in addition to pressure, requires the improvement of magma crystallization models to simulate liquid lines of descent in the presence of small amounts of water. KEY WORDS: MORB; Mid-Atlantic Ridge; depth of crystallization; water abundances; phase equilibria calculations; cotectic crystallization; pressure estimates; polybaric fractionation
    Keywords: DERIDGE; Dredge; DRG; From Mantle to Ocean: Energy-, Material- and Life-cycles at Spreading Axes; M41/2; M41/2_132; M41/2_133; M41/2_136; M41/2_137; M41/2_138; M41/2_139; M41/2_140; M41/2_141; M41/2_142; M41/2_143; M41/2_144; M41/2_145; M41/2_146; M41/2_147; M41/2_148; M41/2_149; M41/2_151; M41/2_152; M41/2_153; M41/2_154; M41/2_155; M41/2_156; M41/2_157; M41/2_158; M41/2_159; M41/2_160; M41/2_161; M41/2_162; M41/2_163; M41/2_164; M41/2_166; M41/2_167; M41/2_169; M41/2_170; M41/2_171; M41/2_172; M41/2_173; M41/2_174; M41/2_188; M41/2_189; M41/2_190; M41/2_191; M41/2_194; M41/2_195; M41/2_196; M41/2_197; M41/2_198; M41/2_199; M41/2_200; M41/2_201; M41/2_202; M41/2_203; Meteor (1986); Mid-Atlantic Ridge at 4-11°S
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 96
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    Age model and pollen analysis from site GIK16867 in the northern Angola Basin (2009)
    PANGAEA
    In:  Supplement to: Dupont, Lydie M; Marret, Fabienne; Winn, Kyaw (1998): Land-sea correlation by means of terrestrial and marine palynomorphs from the equatorial East Atlantic: phasing of SE trade winds and the oceanic productivity. Palaeogeography, Palaeoclimatology, Palaeoecology, 142(1-2), 51-84, https://doi.org/10.1016/S0031-0182(97)00146-6
    Details
    Publication Date: 2024-06-26
    Description: Sporomorphs and dinoflagellate cysts from site GIK16867 in the northern Angola Basin record the vegetation history of the West African forest during the last 700 ka in relation to changes in salinity and productivity of the eastern Gulf of Guinea. During most cool and cold periods, the Afromontane forest, rather than the open grass-rich dry forest, expanded to lower altitudes partly replacing the lowland rain forest of the borderlands east of the Gulf of Guinea. Except in Stage 3, when oceanic productivity was high during a period of decreased atmospheric circulation, high oceanic productivity is correlated to strong winds. The response of marine productivity in the course of a climatic cycle, however, is earlier than that of wind vigour and makes wind-stress-induced oceanic upwelling in the area less likely. Monsoon variation is well illustrated by the pollen record of increased lowland rain forest that is paired to the dinoflagellate cyst record of decreased salinity forced by increased precipitation and run-off.
    Keywords: Giant box corer; GIK/IfG; GIK16867-1; GIK16867-2; GIK16867-3; GKG; Gravity corer (Kiel type); Institute for Geosciences, Christian Albrechts University, Kiel; KOL; M6/5; Meteor (1986); off Gabun; Piston corer (Kiel type); SL
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 97
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    Organic-walled dinoflagellate cysts and environmental analysis of surface sediments from the Northwest African upwelling area (2009)
    PANGAEA
    In:  Supplement to: Holzwarth, Ulrike; Esper, Oliver; Zonneveld, Karin A F (2010): Organic-walled dinoflagellate cysts as indicators of oceanographic conditions and terrigenous input in the NW African upwelling region. Review of Palaeobotany and Palynology, 159(1-2), 35-55, https://doi.org/10.1016/j.revpalbo.2009.10.005
    Details
    Publication Date: 2024-06-26
    Description: In order to examine the spatial distribution of organic-walled dinoflagellate cysts (dinocysts) in recent sediments related to environmental conditions in the water column, thirty-two surface sediment samples from the NW African upwelling region (20-32°N) were investigated. Relative abundances of the dinocyst species show distinct regional differences allowing the separation of four hydrographic regimes. (1) In the area off Cape Ghir, which is characterized by most seasonal upwelling and river discharge, Lingulodinium machaerophorum strongly dominates the associations which are additionally characterized by cysts of Gymnodinium nolleri, cysts of Polykrikos kofoidii and cysts of Polykrikos schwartzii. (2) Off Cape Yubi, a region with increasing perennial upwelling, L. machaerophorum, Brigantedinium spp., species of the genus Impagidinium and cysts of Protoperidinium stellatum occur in highest relative abundances. (3) In coastal samples between Cape Ghir and Cape Yubi, Gymnodinium catenatum, species of the genus Impagidinium, Nematosphaeropsis labyrinthus, Operculodinium centrocarpum, cysts of P. stellatum and Selenopemphix nephroides determine the species composition. (4) Off Cape Blanc, where upwelling prevails perennially, and at offshore sites, heterotrophic dinocyst species show highest relative abundances. A Redundancy Analysis reveals fluvial mud, sea surface temperature and the depth of the mixed layer in boreal spring (spring) as the most important parameters relating to the dinocyst species association. Dinocyst accumulation rates were calculated for a subset of samples using well-constrained sedimentation rates. Highest accumulation rates with up to almost 80.000 cysts cm**-2 ky**-1 were found off Cape Ghir and Cape Yubi reflecting their eutrophic upwelling filaments. A Redundancy Analysis gives evidence that primary productivity and the input of fluvial mud are mostly related to the dinocyst association. By means of accumulation rate data, quantitative cyst production of individual species can be considered independently from the rest of the association, allowing autecological interpretations. We show that a combined interpretation of relative abundances and accumulation rates of dinocysts can lead to a better understanding of the productivity conditions off NW Africa.
    Keywords: 220; 221; 222; 227; 230; 231; Agadir Canyon; Center for Marine Environmental Sciences; CTD/Rosette; CTD-RO; GeoB4024-1; GeoB4025-2; GeoB4026-1; GeoB4213-1; GeoB4216-2; GeoB4225-3; GeoB4226-1; GeoB4230-1; GeoB4231-2; GeoB4233-2; GeoB4236-2; GeoB5530-3; GeoB5533-1; GeoB5536-3; GeoB5539-2; GeoB5540-3; GeoB5548-3; GeoB5549-2; GeoB5553-2; GeoB6005-1; GeoB6006-2; GeoB6007-1; GeoB6008-2; GeoB6009-1; GeoB6010-1; GeoB6011-2; GeoB7413-2; GeoB7414-1; GeoB7415-1; GeoB7420-1; GeoB7423-2; GeoB7424-1; Giant box corer; GKG; M37/1; M42/4b; M45/5a; MARUM; Meteor (1986); MUC; MultiCorer; POS272; Poseidon; VH96/1-3; Victor Hensen
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 98
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    Nd/Ca ratios in plankton-towed and core top foraminifera (2009)
    PANGAEA
    In:  Supplement to: Martínez-Botí, Miquel Àngel; Vance, Derek; Mortyn, P Graham (2009): Nd/Ca ratios in plankton-towed and core top foraminifera: Confirmation of the water column acquisition of Nd. Geochemistry, Geophysics, Geosystems, 10(8), Q08018, https://doi.org/10.1029/2009GC002701
    Details
    Publication Date: 2024-06-26
    Description: Planktic foraminifera have been used as recorders of the neodymium (Nd) isotopic composition of seawater, although there is still controversy over the precise provenance of the Nd signal. We present an extensive, multispecific plankton tow Nd/Ca data set from several geographic locations (SE Atlantic, NE Atlantic, Norwegian Sea, and western Mediterranean), together with core top samples from the Mediterranean region. The range of Nd/Ca ratios in plankton-towed foraminifera, cleaned only of organic material, from all regions (0.01-0.7 µmol/mol), is similar to previously published analyses of sedimentary foraminifera cleaned using both oxidative and reductive steps, with distribution coefficients (Kd) ranging between 4 and 302. For the Mediterranean, where core top and plankton tow data are both available, the range for plankton tows (0.05-0.7 µmol/mol) is essentially identical to that for the core tops (0.1-0.5 µmol/mol). Readsorption of Nd during cleaning is ruled out by the fact that the plankton tow samples underwent only an oxidative cleaning process. We find a relationship between manganese (Mn) and Nd in plankton tow samples that is mirrored by a similar correlation in core top samples. This relationship suggests that Fe-Mn coatings are of negligible importance to the Nd budgets of foraminifera as the Nd/Mn ratio it implies is over an order of magnitude greater than that seen in other Fe-Mn oxide phases. Rather, since both plankton tows and core tops present a similar behavior, the Nd/Mn relationship must originate in the upper water column. The data are consistent with the acquisition of Nd and Mn from the water column by binding to organic material and the fact that intratest organic material is shielded from both aggressive cleaning and diagenetic processes. Collectively, the results help to explain two abiding puzzles about Nd in sedimentary planktic foraminifera: their high REE contents and the fact that they record a surface water Nd isotopic signal, regardless of the cleaning procedure used.
    Keywords: Alboran Sea; ARK-XXI/1a; CT; Mediterranean Sea, Western Basin; MUC; MultiCorer; Norwegian-Greenland Sea; Polarstern; POS334; POS334_74-6; POS334_75-7; POS334_78-7; POS334_79-7; POS334_80-7; POS334_81-6; POS334-track; Poseidon; PS68; PS68/1a-track; Thomas G. Thompson; Tirreno Sea; TT057; TT057-track; Underway cruise track measurements; Western Mediterranean Sea
    Type: Dataset
    Format: application/zip, 8 datasets
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  • 99
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    Manganese analysis from equatorial Pacific sediments (1975)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: Analysis of manganese in sediments of the equatorial Pacific.
    Keywords: BC; Box corer; Dredge, bucket; DRG_BU; FFGR; Free-fall grab; Mn-74-01-001-FFG-001; Mn-74-01-001-FFG-002; Mn-74-01-001-FFG-003; Mn-74-01-002-FFG-004; Mn-74-01-002-FFG-006; Mn-74-01-003-FFG-007; Mn-74-01-003-FFG-009; Mn-74-01-005-B2; Mn-74-01-006-FFG-016; Mn-74-01-006-FFG-017; Mn-74-01-006-FFG-018; Mn-74-01-006-FFG-019; Mn-74-01-006-FFG-020; Mn-74-01-006-FFG-021; Mn-74-01-006-FFG-022; Mn-74-01-006-FFG-023; Mn-74-01-006-FFG-025; Mn-74-01-006-FFG-026; Mn-74-01-007-FFG-028; Mn-74-01-007-FFG-029; Mn-74-01-008-FFG-032; Mn-74-01-009-FFG-036; Mn-74-01-010-FFG-037; Mn-74-01-010-FFG-038; Mn-74-01-010-FFG-039; Mn-74-01-010-FFG-042; Mn-74-01 IODE; Mn-74-02-13A-FFG-004; Mn-74-02-13B-D-001; Mn-74-02-13B-FFG-005; Mn-74-02-13B-FFG-007; Mn-74-02-13B-FFG-008; Mn-74-02-13C-D-002; Mn-74-02-13C-D-004; Mn-74-02-13C-FFG-009; Mn-74-02-13C-FFG-011; Mn-74-02-13C-FFG-012; Mn-74-02-15-FFG-021; Mn-74-02-15-FFG-025; Mn-74-02-16-FFG-030; Mn-74-02-16-FFG-037; Mn-74-02 IDOE DOMES; Moana Wave; MW7401; MW7401-01G01; MW7401-01G02; MW7401-01G03; MW7401-02G04; MW7401-02G06; MW7401-03G07; MW7401-03G09; MW7401-05B02; MW7401-06G16; MW7401-06G17; MW7401-06G18; MW7401-06G19; MW7401-06G20; MW7401-06G21; MW7401-06G22; MW7401-06G23; MW7401-06G25; MW7401-06G26; MW7401-07G28; MW7401-07G29; MW7401-08G32; MW7401-09G36; MW7401-10G37; MW7401-10G38; MW7401-10G39; MW7401-10G42; MW7402; MW7402-13D01; MW7402-13D02; MW7402-13D04; MW7402-13G04; MW7402-13G05; MW7402-13G07; MW7402-13G08; MW7402-13G09; MW7402-13G11; MW7402-13G12; MW7402-15G21; MW7402-15G25; MW7402-16G30; MW7402-16G37; MW7402D-SBT1; MW7402D-SBT2; MW7402D-SBT4; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Pacific Ocean; TRAWL; Trawl net
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 100
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    Meiofauna and nematode abundances from cold seep related habitats along the Norwegian coast (2009)
    PANGAEA
    In:  Supplement to: Van Gaever, Saskia; Olu, Karine; Derycke, Sofie; Vanreusel, Ann (2009): Metazoan meiofaunal communities at cold seeps along the Norwegian margin: Influence of habitat heterogeneity and evidence for connection with shallow-water habitats. Deep Sea Research Part I: Oceanographic Research Papers, 56, 772-785, https://doi.org/10.1016/j.dsr.2008.12.015
    Details
    Publication Date: 2024-06-26
    Description: Cold-seep environments and their associated symbiont-bearing megafaunal communities create islands of primary production for macro- and meiofauna in the otherwise monotonous and nutrient-poor deep-sea environment. To examine the spatial variation and distribution patterns of metazoan meiobenthos in different seepage-related habitats, samples were collected in two regions off Norway: several pockmarks associated with the Storegga Slide including the Nyegga pockmark area (730 m; 64°N), and the active, methane-venting Håkon Mosby Mud Volcano (HMMV) west of the Barents Sea (1280 m; 72°N). Based on sediment geochemistry and associated epifauna, three different habitat types were distinguished across the two regions: (1) reduced sediment with suboxic conditions, sometimes covered by bacterial mats, (2) sediment colonised by chemosynthetic, siboglinid tubeworms, and (3) sediment outside the influence of seepage and without a large chemosynthetic fauna. Meiofaunal communities varied strongly in terms of generic diversity and dominance among the different habitat types. Control sites and Siboglinidae polychaete fields both supported high nematode genus richness similar to normal deep-sea sediments, whereas the reduced sediments yielded a genus-poor nematode community dominated by one or two successful species. Meiofaunal densities in the different habitats were negatively correlated with macrobenthic densities. An extremely dense (〉11,000 ind. 10 cm**2), mono-specific nematode population appeared to be restricted to the bacterial mats at HMMV. It consisted of a new cryptic species of the Halomonhystera disjuncta complex, which has been described from intertidal habitats in the North Sea. The reduced seep sediments at Nyegga did not yield H. disjuncta but were dominated by Terschellingia longicaudata, another cosmopolitan nematode species known to be abundant in organic-rich, oxygen-poor, shallow-water environments. These observations point to a past or recent connection between margins and shallow-water habitats.
    Keywords: ARK-XIX/3b; Håkon Mosby Mud Volcano; HERMES; HERMIONE; Hotspot Ecosystem Research and Mans Impact On European Seas; Hotspot Ecosystem Research on the Margins of European Seas; MUC; MultiCorer; Nyegga; Polarstern; Pourquoi Pas ? (2005); PS64; PS64/317_PUC-1; PS64/317_PUC-2; PS64/317_PUC-4; PS64/326_PUC-3; PS64/326_PUC-4; PS64/326_PUC-5; PS64/326_PUC-6; PS64/347_PUC-10; PS64/347_PUC-12; PS64/377_PUC-22; PS64/377_PUC-23; PS64/377_PUC-28; PUC; Push corer; Storegga North East; VICKING; VKGD272/PC-1; VKGD272/PC-14; VKGD272/PC-18; VKGD272/PC-8; VKGD275/PC-5; VKGD275/PC-6; VKGD277/PC-2; VKGD277/PC-5; VKGMTB2; VKGMTB3
    Type: Dataset
    Format: application/zip, 6 datasets
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