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  • 2010-2014  (567,335)
  • 1980-1984  (12)
  • 2011  (567,335)
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  • 1
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    Amino acids from ODP Holes 117-722B and 177-724C (2011)
    PANGAEA
    In:  Supplement to: Möbius, Jürgen; Gaye, Birgit; Lahajnar, Niko; Bahlmann, Enno; Emeis, Kay-Christian (2011): Influence of diagenesis on sedimentary d15N in the Arabian Sea over the last 130 kyr. Marine Geology, 284(1-4), 127-138, https://doi.org/10.1016/j.margeo.2011.03.013
    Details
    Publication Date: 2024-06-29
    Description: Sedimentary d15N records are valuable archives of ocean history but they are often modified during early diagenesis. Here we quantify the effect of early diagenetic enrichment on sedimentary N-isotope composition in order to obtain the pristine signal of reactive N assimilated in the euphotic zone. This is possible by using paired data of d15N and amino acid composition of sediment samples, which can be applied to estimate the degree of organic matter degradation. We determined d15N and amino acid composition in coeval sediments from Ocean Drilling Program (ODP) Hole 772 B in the central Arabian Sea and from Hole 724 C situated on the Oman Margin in the western Arabian Sea coastal upwelling area. The records span the last 130 kyr and include two glacial-interglacial cycles. These new data are used in conjunction with data available for surface sediments that cover a wide range of organic matter degradation states, and with other cores from the northern and eastern Arabian Sea to explore spatial variations in the isotopic signal. In order to reconstruct pristine N values we apply the relationship between organic matter degradation and 15N enrichment in surface sediments to correct the core records for early diagenetic enrichment. Reconstructed d15N values suggest a significant role of N2-fixation during glacial stages. An evaluation of two preservation indices based on amino acid composition (Reactivity Index, RI; Jennerjahn and Ittekkot, 1997; and the Degradation Index, DI; Dauwe et al., 1999) in both recent sediments and core samples suggests that the RI is more suitable than the DI in correcting Arabian Sea d15N records for early diagenetic enrichment.
    Keywords: Archive of Ocean Data; ARCOD; BGR; Bundesanstalt für Geowissenschaften und Rohstoffe, Hannover; Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 2
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    Lead, sulphate, and aluminium concentrations and lead crustal enrichment factors in Mt. Logan ice core during pre-anthropogenic to modern periods (2011)
    PANGAEA
    In:  Supplement to: Osterberg, Erich; Mayewski, Paul; Kreutz, Karl; Fisher, D; Handley, Michael; Sneed, S; Zdanowicz, Christian; Zheng, J; Demuth, M; Waskiewicz, M; Bourgeois, Jocelyne (2008): Ice core record of rising lead pollution in the North Pacific atmosphere. Geophysical Research Letters, 35(5), L05810, https://doi.org/10.1029/2007GL032680
    Details
    Publication Date: 2024-06-29
    Description: A high-resolution, 8000 year-long ice core record from the Mt. Logan summit plateau (5300 m asl) reveals the initiation of trans-Pacific lead (Pb) pollution by ca. 1730, and a 〉10-fold increase in Pb concentration (1981-1998 mean = 68.9 ng/l) above natural background (5.6 ng/l) attributed to rising anthropogenic Pb emissions from Asia. The largest rise in North Pacific Pb pollution from 1970-1998 (end of record) is contemporaneous with a decrease in Eurasian and North American Pb pollution as documented in ice core records from Greenland, Devon Island, and the European Alps. The distinct Pb pollution history in the North Pacific is interpreted to result from the later industrialization and less stringent abatement measures in Asia compared to North America and Eurasia. The Mt. Logan record shows evidence for both a rising Pb emissions signal from Asia and a trans-Pacific transport efficiency signal related to the strength of the Aleutian Low.
    Keywords: Ice_core_diverse; ICEDRILL; Ice drill; International Polar Year (2007-2008); IPY; Mt_Logan_PRCol; Sampling/drilling ice; Yukon, Canada, North America
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 3
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    Stable isotope analysis of Porites coral core from the Andaman Islands (2011)
    PANGAEA
    In:  Supplement to: Rixen, Tim; Ramachandran, Purvaja; Lehnhoff, Laura; Dasbach, Dorothee; Gaye, Birgit; Urban, Brigitte; Ramachandran, Ramesh; Ittekkot, Venugopalan (2011): Impact of monsoon-driven surface ocean processes on a coral off Port Blair on the Andaman Islands and their link to North Atlantic climate variations. Global and Planetary Change, 75(1-2), 1-13, https://doi.org/10.1016/j.gloplacha.2010.09.005
    Details
    Publication Date: 2024-06-29
    Description: North Atlantic climate variations are reflected in sedimentary records from the northern Indian Ocean in which two basins, the Arabian Sea and the Bay of Bengal, are strongly affected by the monsoon. Contrary to the Bay of Bengal the Arabian Sea plays an important role in the global marine nitrogen cycle. In its mid-water oxygen minimum zone (OMZ) bioavailable fixed nitrogen is reduced to nitrogen gas (NO3- - 〉 N2), whereas oxygen concentrations are slightly above the threshold of nitrate reduction in the OMZ of the Bay of Bengal. A coral colony (Porites lutea) growing south of Port Blair on the Andaman Islands in the Bay of Bengal was studied for its response to changes in the monsoon system and its link to temperature changes in the North Atlantic Ocean, between 1975 and 2006. Its linear extension rates, d13C and d18O values measured within the coral skeleton reveal a strong seasonality, which seems to be caused by the monsoon-driven reversal of the surface ocean circulation. The sampling site appears to be influenced by low salinity Bay of Bengal Water during the NE monsoon (boreal winter) and by the high salinity Arabian Sea Water during the SW monsoon in summer. The high salinity Arabian Sea Water circulates along with the Summer Monsoon Current (S-MC) from the Arabia Sea into the Bay of Bengal. Decreasing d18O and reconstructed salinity values correlate to the increasing SSTs in the North Atlantic Ocean indicating a reduced influence of the S-MC at the sampling site in the course of northern hemispheric warming. During such periods oxygen-depletion became stronger in the OMZ of the Arabian Sea as indicated by the sedimentary records. A reduced propagation of oxygen-depleted high salinity Arabian Sea Water into the Bay of Bengal could be a mechanism maintaining oxygen concentration above the threshold of nitrate reduction in the OMZ of the Bay of Bengal in times of global warming.
    Keywords: Age; AGE; Andaman_Islands; Burma Sea, Andaman Sea; Date; DISTANCE; DIVER; Mass spectrometer, Finnigan, MAT 253; Porites lutea, δ13C; Porites lutea, δ18O; Sampling by diver
    Type: Dataset
    Format: text/tab-separated-values, 1488 data points
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  • 4
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    Photographs of Potter Cove, King George Island, looking northeast towards glacier in 2011 (2011)
    PANGAEA
    In:  Instituto Antártico Argentino, Buenos Aires, Argentina
    Details
    Publication Date: 2024-06-29
    Keywords: Carlini_Base_C2; Carlini/Jubany Station; DATE/TIME; IMCOAST/IMCONet; Impact of climate induced glacier melt on marine coastal systems, Antarctica; Jubany; Jubany_Station_C2; Potter Cove, King George Island, Antarctic Peninsula; Research station; RS; Uniform resource locator/link to image; Uniform resource locator/link to thumbnail; Webcam
    Type: Dataset
    Format: text/tab-separated-values, 1938 data points
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  • 5
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    (Table 1) Age and bottom water oxygen from NAST, EAST, SO90-111KL as well as ODP Holes 117-722B and 177-724C (2011)
    PANGAEA
    Details
    Publication Date: 2024-06-29
    Keywords: 117-722B; 117-724C; AGE; Age, maximum/old; Age, minimum/young; Arabian Sea; BGR; Bundesanstalt für Geowissenschaften und Rohstoffe, Hannover; DRILL; Drilling/drill rig; EAST_GC; Elevation of event; Event label; GC; Gravity corer; Indian Ocean; interpolated; Joides Resolution; KL; Latitude of event; Leg117; Longitude of event; NAST_GC; Ocean Drilling Program; ODP; Oxygen; PAKOMIN; Piston corer (BGR type); SO90; SO90_111KL; Sonne
    Type: Dataset
    Format: text/tab-separated-values, 15 data points
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  • 6
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    (Appendix 1) Molar percentages of individual amino acids from ODP Hole 117-724C (2011)
    PANGAEA
    Details
    Publication Date: 2024-06-29
    Keywords: 117-724C; AGE; Alanine; Amino acid, total hydrolysable; Arabian Sea; Arginine; Aspartic acid; beta-Alanine; Cysteic acid; Degradation index of amino acids (Dauwe et al., 1999); DRILL; Drilling/drill rig; Factor 1; Factor 2; gamma-Aminobutyric acid; Glutamic acid; Glycine; Histidine; Isoleucine; Joides Resolution; Leg117; Leucine; Lysine; Methionine; Ocean Drilling Program; ODP; Ornithine; Phenylalanine; Reactivity index of amino acids (Jennerjahn & Ittekkot, 1997); Serine; Taurine; Threonine; Tryptophan; Tyrosine; Valine
    Type: Dataset
    Format: text/tab-separated-values, 1562 data points
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  • 7
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    (Appendix 2) Molar percentages of individual amino acids from ODP Hole 117-722B (2011)
    PANGAEA
    Details
    Publication Date: 2024-06-29
    Keywords: 117-722B; AGE; Alanine; Amino acid, total hydrolysable; Arabian Sea; Arginine; Aspartic acid; beta-Alanine; Cysteic acid; Degradation index of amino acids (Dauwe et al., 1999); DRILL; Drilling/drill rig; Factor 1; Factor 2; gamma-Aminobutyric acid; Glutamic acid; Glycine; Histidine; Isoleucine; Joides Resolution; Leg117; Leucine; Lysine; Methionine; Ocean Drilling Program; ODP; Ornithine; Phenylalanine; Reactivity index of amino acids (Jennerjahn & Ittekkot, 1997); Serine; Taurine; Threonine; Tryptophan; Tyrosine; Valine
    Type: Dataset
    Format: text/tab-separated-values, 1326 data points
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  • 8
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    (Table 1) Mean lead, sulphate and aluminium concentrations, lead crustal enrichment factor and lead flux in Mt. Logan ice core (2011)
    PANGAEA
    Details
    Publication Date: 2024-06-29
    Keywords: Age; AGE; Aluminium; Enrichment factor; Ice_core_diverse; ICEDRILL; Ice drill; Lead; Lead, flux; Mt_Logan_PRCol; Sampling/drilling ice; Sulfate; Yukon, Canada, North America
    Type: Dataset
    Format: text/tab-separated-values, 28 data points
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  • 9
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    (Supplement table 1) Crustal enrichment factors of lead in Mt. Logan ice core during pre-anthropogenic to modern periods (2011)
    PANGAEA
    Details
    Publication Date: 2024-06-29
    Keywords: Age; AGE; Enrichment factor; Ice_core_diverse; ICEDRILL; Ice drill; Mt_Logan_PRCol; Sampling/drilling ice; Yukon, Canada, North America
    Type: Dataset
    Format: text/tab-separated-values, 40 data points
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  • 10
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    Compilation of 220 sediment core δ¹³C data from the glacial Atlantic Ocean (2011)
    PANGAEA
    In:  Supplement to: Hesse, Tilman; Butzin, Martin; Bickert, Torsten; Lohmann, Gerrit (2011): A model-data comparison of d13C in the glacial Atlantic Ocean. Paleoceanography, 26, PA3220, https://doi.org/10.1029/2010PA002085
    Details
    Publication Date: 2024-06-28
    Description: We compare a compilation of 220 sediment core d13C data from the glacial Atlantic Ocean with three-dimensional ocean circulation simulations including a marine carbon cycle model. The carbon cycle model employs circulation fields which were derived from previous climate simulations. All sediment data have been thoroughly quality controlled, focusing on epibenthic foraminiferal species (such as Cibicidoides wuellerstorfi or Planulina ariminensis) to improve the comparability of model and sediment core carbon isotopes. The model captures the general d13C pattern indicated by present-day water column data and Late Holocene sediment cores but underestimates intermediate and deep water values in the South Atlantic. The best agreement with glacial reconstructions is obtained for a model scenario with an altered freshwater balance in the Southern Ocean that mimics enhanced northward sea ice export and melting away from the zone of sea ice production. This results in a shoaled and weakened North Atlantic Deep Water flow and intensified Antarctic Bottom Water export, hence confirming previous reconstructions from paleoproxy records. Moreover, the modeled abyssal ocean is very cold and very saline, which is in line with other proxy data evidence.
    Keywords: 0010PG; 0016PG; 0021PG; 0026PG; 0029PG; 0032PG; 0033GGC; 0036PG; 0038PG; 0044PG; 0050PG; 0055PG; 0058PG; 0066PG; 0071PG; 0075PG; 0082PG; 0091PG; 0100GGC; 06MT15_2; 06MT41_3; 108-658; 108-659; 162-980; 162-982; 175-1084; 175-1085A; 175-1087A; 177-1088; 293; 313; 68-502_Site; 81-552; 90b; Agadir Canyon; Age, comment; Agulhas Basin; AII60-13APC; ALB-226; also published as VM28-122; Amazon Fan; Angola Basin; ANT-IV/1c; ANT-IX/4; ANT-VIII/3; Arctic Ocean; Argentine Basin; ARK-II/5; ARK-VIII/3; Atlantic Ocean; BCR; Benguela Current, South Atlantic Ocean; Biscaya; BOFS11882#4; BOFS11891#4; BOFS11896#1; BOFS11K; BOFS14K; BOFS26/6K; BOFS26#6; BOFS28/3K; BOFS28#3; BOFS29/1K; BOFS29#1; BOFS30/3K; BOFS30#3; BOFS31/1K; BOFS31#1; BOFS5K; Box corer (Reineck); Brazil Basin; CALYPSO; Calypso Corer; Canarias Sea; Cape Basin; Caribbean Sea; Caribbean Sea/RIDGE; CD53; Ceara Rise; CH73-139; CH73-139C; CH7X; CH8X; Charles Darwin; CHN115-70PC; CHN115-88PC; CHN115-89PC; CHN115-90PC; CHN115-91PC; CHN115-92PC; CHN82-24; CHN82-4115; Cibicidoides wuellerstorfi, δ13C; Cibicidoides wuellerstorfi, δ13C, standard deviation; Comment; COMPCORE; Composite Core; D184; Discovery (1962); DRILL; Drilling/drill rig; East Atlantic; East Brazil Basin; Eastern Rio Grande Rise; eastern Romanche Fracture Zone; Elevation of event; EN06601; EN066-10PG; EN066-16PG; EN066-21PG; EN066-26PG; EN066-29PG; EN066-32PG; EN066-36PG; EN066-38PG; EN066-44PG; EN120; EN120-1GGC; Endeavor; Equatorial Atlantic; Event label; EW9302; EW9302-14JPC; FGGE-Equator 79 - First GARP Global Experiment; GC; GeoB1028-5; GeoB1031-4; GeoB1032-2; GeoB1034-1; GeoB1035-3; GeoB1041-1; GeoB1101-4; GeoB1105-3; GeoB1112-3; GeoB1113-4; GeoB1115-3; GeoB1117-2; GeoB1118-2; GeoB1211-1; GeoB1214-1; GeoB1220-1; GeoB1306-1; GeoB1312-2; GeoB1417-1; GeoB1419-2; GeoB1501-4; GeoB1503-1; GeoB1505-1; GeoB1508-4; GeoB1515-1; GeoB1520-1; GeoB1523-1; GeoB1710-2; GeoB1711; GeoB1711-4; GeoB1721-6; GeoB1722-1; GeoB1903-3; GeoB1905-3; GeoB2004-2; GeoB2016-1; GeoB2019-1; GeoB2109-1; GeoB2204-1; GeoB2215-10; GeoB2819-1; GeoB3104-1; GeoB3603-2; GeoB3722-2; GeoB3801-6; GeoB3808-6; GeoB3813-3; GeoB4216-1; GeoB4240-2; GeoB4403-2; GeoB5115-2; GeoB5121-2; GeoB7920-2; GeoB9508-5; GeoB9528-3; GEOTROPEX 83, NOAMP I; Giant box corer; GIK11944-2; GIK12309-2; GIK12310-3; GIK12328-5; GIK12329-6; GIK12337-4; GIK12345-5; GIK12347-1; GIK12379-3; GIK12392-1; GIK13239-1; GIK13289-3; GIK13519-1; GIK13521-1; GIK15612-2; GIK15627-3; GIK15637-1; GIK15666-1; GIK15669-1; GIK15670-5; GIK15672-1; GIK16004-1; GIK16006-1; GIK16017-2; GIK16030-1; GIK16402-1; GIK16408-5; GIK16415-1; GIK16453-2; GIK16455-1; GIK16457-1; GIK16458-2; GIK16459-1; GIK16771-2; GIK16772-1; GIK16772-2; GIK16773-1; GIK17045-3; GIK17048-3; GIK17049-6; GIK17050-1; GIK17051-3; GIK17055-1; GIK23243-1 PS05/431; GIK23258-2; GIK23258-3; GIK23414-9; GIK23415-9; GIK23416-4; GIK23417-1; GIK23418-8; GIK23419-6; GIK23519-4; GIK23519-5; GKG; Glomar Challenger; Gravity corer; Gravity corer (Kiel type); Greenland Sea; Guinea Basin; HARMATTAN; HRM-CH71-07; Hunter Channel; IMAGES I; IMAGES V; IOW226920-3; Jean Charcot; Joides Resolution; JOPSII-6; JPC; Jumbo Piston Core; KAL; Kasten corer; KN11002; Knorr; KNR110-50; KNR110-55; KNR110-58; KNR110-66; KNR110-71; KNR110-75; KNR110-82; KNR110-91; KNR140; KNR140-01JPC; KNR140-02JPC; KNR140-12JPC; KNR140-2-12JPC; KNR140-2-22JPC; KNR140-2-28GGC; KNR140-2-29GGC; KNR140-22JPC; KNR140-2-30GGC; KNR140-2-51GGC; KNR140-28GGC; KNR140-29GGC; KNR140-30GGC; KNR140-37JPC; KNR140-39GGC; KNR140-43GGC; KNR140-51GGC; KNR140-64GGC; KNR140-66GGC; KNR140-67JPC; KNR64-5; KOL; KW-31; Latitude of event; Leg108; Leg162; Leg175; Leg177; Leg68; Leg81; Le Suroît; Longitude of event; LYII-13A; M11/1; M12/1; M12392-1; M15/2; M16/1; M16/2; M17/2; M20/2; M23; M23_099; M23/1; M23/2; M23/3; M23414; M25; M29/2; M34/1; M34/2; M34/3; M35/1; M35003-1; M37/1; M38/2; M39; M41/3; M48/2; M48/2_386; M51; M53; M53_169; M53_170; M53_172; M53/1; M57; M6/5; M6/6; M60; M65; M65/1; M7/2; M9/4; Marion Dufresne (1995); Maurice Ewing; MD101; MD114; MD952039; MD95-2039; MD952040; MD95-2040; MD99-2334; Meteor (1964); Meteor (1986); Meteor Rise; MG-237; Mid Atlantic Ridge; MSN; MUC; MultiCorer; Multiple opening/closing net; NA87-22; Namibia Continental Margin; Namibia continental slope; NE-Brazilian continental margin; Nordost-Atlantik-Expedition 1971; North Atlantic; North Atlantic/PLATEAU; Northeast Atlantic; Northern Cape Basin; Norwegian Sea; OC205-02; OC205-02_0033GGC; OC205-02_0100GGC; Oceanus; Oceanus205-02; off West Africa; PALEOCINAT II; PC; Piston corer; Piston corer (Kiel type); PLA; Plankton net; Polarstern; Porto Seamount; POS210/2; Poseidon; Precision; Providence Channel; PS05; PS08; PS1243-1; PS16; PS16/278; PS1754-3; PS18; PS18/238; PS19/245; PS19 ARCTIC91; PS2082-1; PS2212-3; RC13; RC13-229; RC15; RC15-93; RC15-94; RC16; RC16-119; RC16-84; Reference of data; REYKJANES-RÜCKEN; Rio Grande Rise; Robert Conrad; Sample amount; Sierra Leone Basin/Guinea Basin; SL; SO82; SO82_5-2; SO84; Sonne; South African margin; South Atlantic Ocean; Southern Cape Basin; Southwest Walvis Ridge; SPC; Sphincter corer; ST. HELENA HOTSPOT; SU92; SU92-21; SUBTROPEX 82; T86-15P; TN057-20; TN057-21; TN057-6; Uniform resource locator/link to file; V12; V12-70; V16; V16-51; V19; V19-236; V19-258; V19-259; V22; V22-108; V23; V23-100; V23-81; V24; V24-253; V25; V25-59; V26; V26-176; V27; V27-60; V27-86; V28; V28-122; V28-127; V28-14; V28-73; V29; V29-135; V29-193; V29-198; V29-202; V30; V30-40; V30-49; VA-10/3; Valdivia (1961); Vema; Vema Channel; Victor Hensen; Walvis Bay/Namibia; Walvis Ridge; Walvis Ridge, Southeast Atlantic Ocean; Yermak Plateau
    Type: Dataset
    Format: text/tab-separated-values, 1646 data points
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