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  • Books  (2)
  • Data  (14)
  • PANGAEA  (14)
  • Bremerhaven : Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung  (1)
  • MIT Press  (1)
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  • 1
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    American economic policy in the 1990s (2002)
    Cambridge, Mass : MIT Press
    Details
    Keywords: United States, Economic conditions, 1981-2001. ; United States, Economic policy, 1993-2001.
    Notes: U.S. monetary policy during the 1990s / N. Gregory Mankiw -- Fiscal policy and Social Security policy during the 1990s / Douglas W. Elmendorf, Jeffrey B. Liebman, David W. Wilcox -- Tax policy from 1990 to 2001 / Eugene Steuerle -- Between meltdown and moral hazard : the international monetary and financial policies of the Clinton administration / J. Bradford DeLong, Barry Eichengreen -- International trade policy in the 1990s / Robert Z. Lawrence -- The "new economy" and information technology policy / Pamela Samuelson, Hal R. Varian -- Antitrust policy in the Clinton administration / Robert E. Litan, Carl Shapiro -- Energy policy during the 1990s / Paul L. Joskow -- National environmental policy during the Clinton years / Robert W. Hahn, Robert N. Stavins -- Putting students and workers first? : education and labor policy in the 1990s / Alan B. Krueger, Cecelia E. Rouse -- The Clinton legacy for America's poor / Rebecca M. Blank, David T. Ellwood -- Health policy in the Clinton era : once bitten, twice shy / David Cutler, Jonathan Gruber -- Medicare / Joseph P. Newhouse -- The process of economic policy-making during the Clinton administration / Jonathan M. Orszag, Peter R. Orszag, Laura D. Tyson
    Pages: xii, 1119 p.
    ISBN: 0-585-44277-0
    URL: http://www.netLibrary.com/urlapi.asp?action=summary&v=1&bookid=70951
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    E-Book (German National Licenses)
  • 2
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    Biogenic halocarbons from the Peruvian upwelling region during METEOR cruise M91 (2016)
    PANGAEA
    In:  Supplement to: Hepach, Helmke; Quack, Birgit; Tegtmeier, Susann; Engel, Anja; Bracher, Astrid; Fuhlbrügge, Steffen; Galgani, Luisa; Atlas, Elliot L; Lampel, Johannes; Frieß, Udo; Krüger, Kirstin (2016): Biogenic halocarbons from the Peruvian upwelling region as tropospheric halogen source. Atmospheric Chemistry and Physics, 16(18), 12219-12237, https://doi.org/10.5194/acp-16-12219-2016
    Details
    Publication Date: 2024-02-01
    Description: Halocarbons, halogenated short-chained hydrocarbons, are produced naturally in the oceans by biological and chemical processes. They are emitted from surface seawater into the atmosphere, where they take part in numerous chemical processes such as ozone destruction and the oxidation of mercury and dimethyl sulfide. Here we present oceanic and atmospheric halocarbon data for the Peruvian upwelling obtained during the M91 cruise onboard the research vessel Meteor in December 2012. Surface waters during the cruise were characterized by moderate concentrations of bromoform (CHBr3) and dibromomethane (CH2Br2) correlating with diatom biomass derived from marker pigment concentrations, which suggests this phytoplankton group as likely source. Concentrations measured for the iodinated compounds methyl iodide (CH3I) of up to 35.4 pmol L-1, chloroiodomethane (CH2ClI) of up to 58.1 pmol L-1 and diiodomethane (CH2I2) of up to 32.4 pmol L-1 in water samples were much higher than previously reported for the tropical Atlantic upwelling systems. Iodocarbons also correlated with the diatom biomass and even more significantly with dissolved organic matter (DOM) components measured in the surface water. Our results suggest a biological source of these compounds as significant driving factor for the observed large iodocarbon concentrations. Elevated atmospheric mixing ratios of CH3I (up to 3.2 ppt), CH2ClI (up to 2.5 ppt) and CH2I2 (3.3 ppt) above the upwelling were correlated with seawater concentrations and high sea-to-air fluxes. The enhanced iodocarbon production in the Peruvian upwelling contributed significantly to tropospheric iodine levels.
    Keywords: SOPRAN; Surface Ocean Processes in the Anthropocene
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 3
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    Biological and chemical water properties measured in water bottle samples during the cruise POS432 in Madeira basin in May 2012 (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-26
    Description: During the cruise POS432 on board the German R/V Poseidon, we collected water with a CTD SBE 11plus equipped with 14 Hydrobios free flow bottles of 10 L each in 15 stations (resulting in almost 100 samples) in the Madeira basin region, Northeast Atlantic. We aimed to study the physical and biogeochemical conditions of the water column along the 22°W meridian, north and south of the Azores Front, in May 2012. We measured concentrations of chlorophyll a, phaeopigments, suspended particulate material (SPM), and nutrients such as nitrate, nitrite, phosphate, and silicate.
    Keywords: Azores Front; biogeochemistry; Chlorophyll a; CTD, Sea-Bird, SBE 911plus; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; ELEVATION; Event label; fluorometer (ethanol extraction; GF/F-filtered) (Grasshoff et al., 1999); gravimetrically (GF/F-filtered) (Grasshoff et al., 1999); Longitude of event; Nitrate; Nitrite; Northeast Atlantic; Phaeopigments; Phosphate; POS432; POS432_118-2; POS432_119-1; POS432_120-1; POS432_121-1; POS432_124-1; POS432_125-1; POS432_126-3; POS432_128-1; POS432_129-1; POS432_131-1; POS432_132-1; POS432_133-1; POS432_136-1; POS432_137-1; POS432_138-1; Poseidon; Salinity; Silicate; Suspended particulate matter; Temperature, water; Water volume, filtered; wet chemical treatment; Continuous flow analysis (Grasshoff et al., 1999)
    Type: Dataset
    Format: text/tab-separated-values, 1020 data points
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  • 4
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    Delivery of halogenated very short-lived substances from the west Indian Ocean to the stratosphere during Asian summer monsoon (2017)
    PANGAEA
    In:  Supplement to: Fiehn, Alina; Quack, Birgit; Hepach, Helmke; Fuhlbrügge, Steffen; Tegtmeier, Susann; Toohey, Matthew; Atlas, Elliot L; Krüger, Kirstin (2017): Delivery of halogenated very short-lived substances from the west Indian Ocean to the stratosphere during the Asian summer monsoon. Atmospheric Chemistry and Physics, 17(11), 6723-6741, https://doi.org/10.5194/acp-17-6723-2017
    Details
    Publication Date: 2023-01-13
    Description: During two cruises wiht RV Sonne, SO234-2 from 8 to 19 July 2014 (Durban, South Africa to Port Louis, Mauritius) and SO235 from 23 July to 7 August 2014 (Port Louis, Mauritius to Malé, Maldives), within the SPACES (Science Partnerships for the Assessment of Complex Earth System Processes) and OASIS (Organic very short-lived Substances and their air sea exchange from the Indian Ocean to the Stratosphere) research projects, surface water samples were sampled from a continuous running pump in the hydrographic shaft of RV Sonne at a depth of 5 m. Deep water samples were taken from a Niskin-bottle rosette sampler. The samples were then analyzed for halogenated compounds using a purge and trap system onboard, which was attached to a gas chromatograph with an electron capture detector for surface water samples and a GC/MS Agilent 5975 for the deep water samples. An analytical reproducibility of 10% was determined from measuring duplicate water samples, detection limit was 0.2 pmol /L. Calibration was performed with several dilutions of a mixed-compound standard prepared in methanol.
    Type: Dataset
    Format: application/zip, 97 datasets
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  • 5
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    Depth distribution and biomass of sublittoral seaweeds at the island of Helgoland in 2005 (2023)
    PANGAEA
    Details
    Publication Date: 2023-12-27
    Description: In 2005, the species composition and spatial distribution of the seaweed community were investigated in the frame of diving surveys along a sublittoral transect in the North of Helgoland that had been investigated ~40 years earlier by Lüning (1970). The cover of dominant brown seaweeds, Fucus serratus, Sargassum muticum, Laminaria digitata, L. hyperborea and Saccharina latissima, was semi-quantitatively assessed to define vegetation zones. Within each zone, all macroalgal species were estimated quantitatively in 3 to 6 random 1 m² quadrats. Additionally, a replicated biomass survey was performed at 6 depths (0.5, 2, 4, 6, 8 and 10 m below mean low water spring tide). The survey investigated the occurrence, cover and relative frequency of the algae community and information about fresh mass and dry mass were obtained. For kelps also stipe length, blade area, blade fresh mass, age and fresh mass of epiphytes was recorded.
    Keywords: algae community; Biomass; cover; distribution; fresh mass; Helgoland; kelp; leaf area index (LAI); Macroalgae; occurence; relative frequency
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 6
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    Halocarbons measured on water bottle samples during METEOR cruise M91 (2015)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2024-06-25
    Keywords: Bottle number; Bromoiodomethane; Chloroiodomethane; CTD/Rosette; CTD-033; CTD-035; CTD-036; CTD-038; CTD-039; CTD-041; CTD-043; CTD-046; CTD-048; CTD-049; CTD-051; CTD-052; CTD-055; CTD-058; CTD-059; CTD-060; CTD-061; CTD-064; CTD-065; CTD-074; CTD-075; CTD-080; CTD-083; CTD-087; CTD-088; CTD-089; CTD-090; CTD-092; CTD-093; CTD-094; CTD-095; CTD-096; CTD-097; CTD-RO; DATE/TIME; DEPTH, water; Dibromochloromethane; Dibromomethane; Diiodomethane; Event label; Iodomethane; Latitude of event; Longitude of event; M91; M91_1736-1; M91_1737-1; M91_1737-3; M91_1739-1; M91_1739-3; M91_1741-1; M91_1743-1; M91_1746-1; M91_1748-1; M91_1749-1; M91_1751-1; M91_1751-3; M91_1752-8; M91_1754-1; M91_1755-2; M91_1755-4; M91_1756-1; M91_1759-1; M91_1760-1; M91_1766-1; M91_1766-3; M91_1769-1; M91_1771-1; M91_1774-1; M91_1774-3; M91_1775-1; M91_1775-3; M91_1776-3; M91_1777-1; M91_1777-12; M91_1777-4; M91_1777-7; M91_1778-1; Meteor (1986); Optional event label; Sample code/label; SOPRAN; South Pacific Ocean; Surface Ocean Processes in the Anthropocene; Tetrachloromethane; Tribromomethane; Trichloroethane; Trichloromethane
    Type: Dataset
    Format: text/tab-separated-values, 1919 data points
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  • 7
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    NanoSIMS data showing how pathogens influence resource partitioning (13C and 15N) in coral (Stylophora pistillata) and their symbiotic dinoflagellates (2018)
    PANGAEA
    In:  Supplement to: Gibbin, Emma M; Gavish, Assaf; Krueger, Thomas; Kramarsky-Winter, Esti; Shapiro, Orr; Guiet, Romain; Jensen, Louise; Vardi, Assaf; Meibom, Anders (2018): Vibrio coralliilyticus infection triggers a behavioural response and perturbs nutritional exchange and tissue integrity in a symbiotic coral. The ISME Journal, https://doi.org/10.1038/s41396-018-0327-2
    Details
    Publication Date: 2023-12-23
    Description: We conducted two isotope experiments (described in Gibbin et al. 2018) to determine how the presence of pathogens influences resource partitioning in the coral holobiont. Specifically, we quantified: 1) 13C-assimilation in Symbiodinium and the amount of 13C-labelled photosynthates that are assimilated by the host; 2) the metabolic turnover of 13C in Symbiodinium and in their host and 3) the incorporation of bacterial-derived N within the tissues of the coral holobiont. NanoSIMS images (either 40×40 or 50×50 µm in size) were obtained by rasterizing a 16 keV Cs+ primary ion beam, focused to a spot-size of 150 nm, across the sample surface. Settings (dwell time = 5 ms; number of pixels = 256×256, layers = 5) were kept constant between images. Data was extracted from drift-corrected images using L'IMAGE (Dr. Larry Nittler, Carnegie Institution of Washington). Regions of interest (ROIs) were drawn around individual symbiont cells and the host gastrodermis (excluding symbionts), using the contour lines on the 12C14N- image. These ROIs were then used to quantify the average enrichment of 13C and 15N in each partner. Our measured values are expressed as Atom Percent Excess (APE, in %).
    Type: Dataset
    Format: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, 47.6 kBytes
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  • 8
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    Pigment measured on water bottle samples during METEOR cruise M91 (2016)
    PANGAEA
    Details
    Publication Date: 2024-06-25
    Keywords: 19-Butanoyloxyfucoxanthin; 19-Hexanoyloxyfucoxanthin; Alloxanthin; alpha-Carotene, beta,epsilon-Carotene; Antheraxanthin; Astaxanthin; beta-Carotene, beta,beta-Carotene; Chlorophyll a; Chlorophyll b; Chlorophyll c1+c2; Chlorophyll c3; CT; CTD/Rosette; CTD-002; CTD-003; CTD-010; CTD-013; CTD-017; CTD-019; CTD-021; CTD-024; CTD-026; CTD-028; CTD-030; CTD-034; CTD-035; CTD-036; CTD-039; CTD-041; CTD-043; CTD-044; CTD-045; CTD-046; CTD-047; CTD-048; CTD-049; CTD-050; CTD-052; CTD-055; CTD-058; CTD-060; CTD-061; CTD-064; CTD-065; CTD-067; CTD-068; CTD-071; CTD-073; CTD-075; CTD-080; CTD-082; CTD-083; CTD-088; CTD-090; CTD-094; CTD-095; CTD-096; CTD-097; CTD-RO; DATE/TIME; DEPTH, water; Diadinoxanthin; Diatoxanthin; Dinoxanthin; Divinyl chlorophyll a; Divinyl chlorophyll b; Event label; Fucoxanthin; Gear; High Performance Liquid Chromatography (HPLC); LATITUDE; LONGITUDE; Lutein; M91; M91_1713-1; M91_1713-3; M91_1719-1; M91_1721-3; M91_1724-3; M91_1725-3; M91_1727-1; M91_1729-1; M91_1731-1; M91_1733-1; M91_1733-13; M91_1736-3; M91_1737-1; M91_1737-3; M91_1739-3; M91_1741-1; M91_1743-1; M91_1744-1; M91_1745-1; M91_1746-1; M91_1747-1; M91_1748-1; M91_1749-1; M91_1750-1; M91_1751-3; M91_1752-8; M91_1754-1; M91_1755-4; M91_1756-1; M91_1759-1; M91_1760-1; M91_1762-2; M91_1763-1; M91_1764-8; M91_1765-1; M91_1766-3; M91_1769-1; M91_1770-4; M91_1771-1; M91_1774-3; M91_1775-3; M91_1777-12; M91_1777-4; M91_1777-7; M91_1778-1; M91-track; Meteor (1986); Mg-2,4-divinyl pheoporphyrin a5 monomethyl ester; Neoxanthin; Peridinin; Phaeophorbide a; Pheophytin a; Pheophytin b; Pyropheophorbide a; Pyropheophytin a; Sample code/label; South Pacific Ocean; Underway cruise track measurements; Violaxanthin; Zeaxanthin
    Type: Dataset
    Format: text/tab-separated-values, 7378 data points
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  • 9
    Series available for loan
    Series available for loan
    Polar systems under pressure : 27th International Polar Conference, Rostock, 25-29 March 2018, German Society for Polar Research (2018)
    Bremerhaven : Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
    Associated volumes
    Details Availability
    Call number: ZSP-168-716
    In: Berichte zur Polar- und Meeresforschung, 716
    Type of Medium: Series available for loan
    Pages: 211 Seiten , Illustrationen
    ISSN: 1866-3192
    Series Statement: Berichte zur Polar- und Meeresforschung 716
    URL: http://doi.org/10.2312/BzPM_0716_2018
    Language: English
    Note: Contents Characterization of soil organic matter of Arctic and Antarctic by 13- C NMR and electron spin resonance spectroscopy / Evgeny Abakumov Development of phosphorus forms in soil chronosequence of the Nordenskioldbreen glacier (Svalbard) / Adel Allaberdina, Václav Tejnecký Vertical snow structures from in-situ and remote sensing measurements / Stefanie Arndt, Nicolas Stoll, Stephan Paul, Christian Haas Phenology of Calanus glacialis – comparison between Arctic and Atlantic domains and its implications for reproductive success of little auks / Kaja Balazy, Emilia Trudnowska, Katarzyna Blachowiak-Samolyk Response of southern tundra ecosystem components on aerial pollution from gas pre-treatment centers in West Siberia / Pavel A. Barsukov Soil-ecological excursions to permafrost-affected areas in West Siberia for European scientists and students / Pavel A. Barsukov, S. Platonova, S. Gizhitskaya, E. Smolentseva, N. Lashchinskiy, A. Babenko, I. Lyubechanskiy, O. Saprykin, O.Rusalimova Christian Siewert Freezing and hungry? Hydrocarbon degrading microbial communities in Barents Sea sediments around Svalbard / Bartholomäus Sven, Nontje Straaten, Daniela Zoch, Martin Krüger Biological soil crust algae in the polar regions – biodiversity, genetic diversity and ecosystem resilience under global change scenarios / Burkhard Becker, Burkhard Büdel and Ulf Karsten UDASH - Unified Database for Arctic and Subarctic Hydrography / Axel Behrendt, Hiroshi Sumata, Benjamin Rabe, Torsten Kanzow and Ursula Schauer Compound-specific radiocarbon constraints on Antarctic sediment chronologies / Sonja Berg, Sandra Jivcov, Janet Rethemeyer Environmental conditions in terrestrial East Antarctica during the last glacial - new evidence from mumiyo deposits / Sonja Berg, Martin Melles, Wolf-Dieter Hermichen, Janet Rethemeyer, Gerhard Kuhn Collection-based diatom research: collection imaging to biogeography and microevolution in the Southern Ocean / Bánk Beszteri, Stefan Pinkernell, Michael Kloster, Ute Postel, Gerhard Kauer, Uwe John, Klaus Valentin, Gernot Glöckner In vivo observations of OWA induced pH changes in the brain of polar cod Boreogadus saida / Christian Bock, Felizitas C. Wermter, Bastian Maus, Hans-O. Pörtner, Wolfgang Dreher A journey into the Triassic polar forests of Antarctica / Benjamin Bomfleur Long-term time-series of Arctic BrO derived from UV-VIS satellite remote sensing / lias Bougoudis, Anne-Marlene Blechschmidt, Andreas Richter, Sora Seo, John P. Burrows The effect of climate change on the carbon balance in microalgae / Deborah Bozzato, Torsten Jakob, Christian Wilhelm Species composition and abundance of the shallow water fish community of Kongsfjorden, Svalbard / Markus Brand, Philipp Fischer Decadal changes in a breeding population of southern giant petrels on King George Island, Antarctic, in response to human activities / Christina Braun, Jan Esefeld, Hans-Ulrich Peter Geodetic GNSS measurements to investigate the recent crustal deformation at the Antarctic Peninsula and in the Amundsen Sea Embayment, West Antarctica / Peter Busch, Mirko Scheinert, Christoph Knöfel, Lutz Eberlein, Martin Horwath, Ludwig Schröder, Andreas Groh Parameterization of snow BRDF measurements in Antarctica / T. Carlsen, G. Birnbaum, A. Ehrlich, M. Schäfer, and M. Wendisch Airborne and in situ ground-based measurements of surface albedo, bidirectional reflectivity, and snow properties on the Antarctic plateau / T. Carlsen, M. Belke Brea, G. Birnbaum, A. Ehrlich, J. Freitag, G. Heygster, L. Istomina, S. Kipfstuhl, A. Orsi, M. Schäfer, and M. Wendisch Retreats of ice sheet and ice shelf driven by warm water incursions in the Ross Sea since the Last Glacial Maximum / Zhihua Chen, Mengshan Ju, Shulan Ge, Zheng Tang, Yuanhui Huang, Renjie Zhao, Ralf Tiedemann, Lester Lembke-Jene Influence of breeze circulation on local wind climatology in Svalbard fjords / Małgorzata Cisek, Przemysław Makuch, Tomasz Petelski, Jacek Piskozub Life strategies on photobiology and metabolite profile of genetic indentical photobionts of two different lichen species / Nadine Determeyer-Wiedmann, Sieglinde Ott Land-Ocean Interactions in the late glacial Bering Sea / B. Diekmann, R. Wang, H. Kühn, R. Gersonde, R. Tiedemann, G. Kuhn Does environmental change affect polar microbial communities? / Daniel R. Dietrich Rapid glacial isostatic uplift in Patagonia: Interplay of enhanced ice mass loss and slab window tectonics / R. Dietrich, A. Richter, E. Ivins, H. Lange, L. Mendoza, L. Schröder, J.L. Hormaechea, G. Casassa, E. Marderwald, M. Fritsche, R. Perdomo, M. Horwath Phylogenomics of the longitarsal Colossendeidae: the evolution of a diverse Antarctic sea spider radiation / Lars Dietz, Jana S. Dömel, Christoph Mayer, Florian Leese Revealing the evolutionary history of Southern Ocean sea spiders using genome-wide SNP data / Jana S. Dömel, Till-Hendrik Macher, Lars Dietz, Christoph Mayer, Roland R. Melzer and Florian Leese Geothermal heat flux derived from airborne magnetic grids and measured temperature gradients in the Amundsen Sea sector of West Antarctica / Ricarda Dziadek, Karsten Gohl, Fausto Ferraccioli, Norbert Kaul, Cornelia Spiegel Sea spray aerosol fluxes in the area of the Spitsbergen Shelf and the Greenland Sea / K. Dziembor, T. Petelski, P. Markuszewski, T. Zieliński, P. Makuch, I. Wróbel More than two decades of geodetic GNSS measurements in Antarctica, Greenland and Patagonia – a technology review / Lutz Eberlein, Mirko Scheinert, Peter Busch, Christoph Knöfel, Andreas Richter Analysing the flow velocity of major outlet glaciers in North Greenland using Landsat data / Benjamin Ebermann, Ralf Rosenau, Mirko Scheinert, Martin Horwath Partitioning growing season net ecosystem exchange of CO2 into photosynthesis, autotrophic and heterotrophic respiration in the Siberian tundra / Tim Eckhardt, Christian Knoblauch, Lars Kutzbach, Gillian Simpson, Eva-Maria Pfeiffer Meteorological collaboration in the Arctic / Johanna Ekman Meteorological aspects of S.A. Andrée’s attempt to reach the North Pole by balloon in 1897 / Dieter Etling Geodetic mass balance on South Georgia glaciers / David Farias-Barahona, Christian Sommer, Thorsten Seehaus, Philipp Malz, Gino Casassa, Matthias H. Braun Frozen-Ground Cartoons: An international collaboration between artists and permafrost scientists / Michael Fritz, Frédéric Bouchard, Bethany Deshpande, Julie Malenfant-Lepage, Alexandre Nieuwendam, Michel Paquette, Ashley Rudy, Matthias Siewert, Audrey Veillette, Stefanie Weege, Jon Harbor, Otto Habeck, Ylva Sjöberg The Akademii Nauk ice core and solar activity / Diedrich Fritzsche, Luisa von Albedyll, Silke Merchel, Thomas Opel, Georg Rugel, Andreas Scharf Walther Bruns, Gründer der „Aeroarctic“ – ein vergessener Pionier der Deutschen Polarforschung / Diedrich Fritzsche Warming and reduction of precipitations affect the microbiome of recently deglaciated soils in the Swiss Alps / Aline Frossard, Johanna Donhauser, Pascal Niklaus, Thomas Rime, Beat Frey The ice-free topography of Svalbard / Johannes J. Fürst, Francisco Navarro, Fabien Gillet-Chaulet, Geir Moholdt, Xavier Fettweis, Charlotte Lang, Thorsten Seehaus, Matthias H. Braun, Douglas I. Benn, Toby J. Benham, Julian A. Dowdeswell, Mariusz Grabiec, Jack Kohler, Katrin Lindbäck, Rickard Pettersson, Heidi Sevestre Scientific Drilling in Antarctica? Coming to a new drilling proposal / Christoph Gaedicke, Gerhard Kuhn, Olaf Eisen, Andreas Läufer, Emma Smith, Nikola Koglin, Boris Biskaborn, Dieter Franke, Ralf Tiedemann German permanent research facilities in Antarctica - a 40 years record / Hartwig Gernandt Pre-glacial and glacial shelf evolution from seismic and seabed drill records of the Amundsen Sea, West Antarctica / Karsten Gohl, Gabriele Uenzelmann-Neben, Robert Larter, Johann Klages, Claus-Dieter Hillenbrand, Torsten Bickert, Steve Bohaty, Ulrich Salzmann, Thomas Frederichs, Catalina Gebhardt, Katharina Hochmuth and Expedition PS104 Science Party The Turnove
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 10
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    Population trends of seabirds in Stinker Point, Elephant Island, South Shetlands - link to shapefiles (2018)
    PANGAEA
    In:  Supplement to: Petry, Maria Virginia; Valls, Fernanda C L; Petersen, Elisa; Finger, Julia V G; Krüger, Lucas (2018): Population trends of seabirds at Stinker Point, Elephant Island, Maritime Antarctica. Antarctic Science, 30(4), 220-226, https://doi.org/10.1017/S0954102018000135
    Details
    Publication Date: 2023-01-13
    Description: This dataset contains in a zipfile the shapefiles for the seabird breeding colonies at Stinker Point (Elephant Island, Maritime Antarctic Peninsula), the elevation of Stinker Point and the Elephant Island contour. All shapefiles are projected in WGS 1984 World Mercator projected coordinate system.
    Keywords: BIO; Biology; Elephant_Is; Elephant Island
    Type: Dataset
    Format: application/zip, 278.7 kBytes
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  • 11
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    Seawater carbonate chemistry and photosynthesis, respiration and calcification of common reef-building coral in the Northern Red Sea (2017)
    PANGAEA
    In:  Supplement to: Krueger, Thomas; Horwitz, Noa; Bodin, Julia; Giovani, Maria-Evangelia; Escrig, Stéphane; Meibom, Anders; Fine, Maoz (2017): Common reef-building coral in the Northern Red Sea resistant to elevated temperature and acidification. Royal Society Open Science, 4(5), 170038, https://doi.org/10.1098/rsos.170038
    Details
    Publication Date: 2024-03-20
    Description: Coral reefs are currently experiencing substantial ecological impoverishment as a result of anthropogenic stressors, and the majority of reefs are facing immediate risk. Increasing ocean surface temperatures induce frequent coral mass bleaching events-the breakdown of the nutritional photo-symbiosis with intracellular algae (genus: Symbiodinium). Here, we report that Stylophora pistillata from a highly diverse reef in the Gulf of Aqaba showed no signs of bleaching despite spending 1.5 months at 1-2°C above their long-term summer maximum (amounting to 11 degree heating weeks) and a seawater pH of 7.8. Instead, their symbiotic dinoflagellates exhibited improved photochemistry, higher pigmentation and a doubling in net oxygen production, leading to a 51% increase in primary productivity. Nanoscale secondary ion mass spectrometry imaging revealed subtle cellular-level shifts in carbon and nitrogen metabolism under elevated temperatures, but overall host and symbiont biomass proxies were not significantly affected. Now living well below their thermal threshold in the Gulf of Aqaba, these corals have been evolutionarily selected for heat tolerance during their migration through the warm Southern Red Sea after the last ice age. This may allow them to withstand future warming for a longer period of time, provided that successful environmental conservation measures are enacted across national boundaries in the region.
    Keywords: Alkalinity, total; Animalia; Aragonite saturation state; Benthic animals; Benthos; Bicarbonate ion; Biomass/Abundance/Elemental composition; Calcification/Dissolution; Calcification rate of calcium carbonate; Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbohydrates; Carbohydrates, per cell; Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Catalase activity, unit per protein mass; Chlorophyll a per cell; Chlorophyll c2/chlorophyll a ratio; Chlorophyll c2 per cell; Chlorophyll total, areal concentration; Chlorophyll total, per cell; Cnidaria; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); Experiment duration; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gross photosynthesis/respiration ratio; Gross photosynthesis rate, oxygen; Growth/Morphology; Initial slope of rapid light curve; Laboratory experiment; Light saturation point; Maximal electron transport rate, relative; Maximum photochemical quantum yield of photosystem II; Net photosynthesis rate, oxygen; Net photosynthesis rate, oxygen, per chlorophyll a; OA-ICC; Ocean Acidification International Coordination Centre; Other metabolic rates; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; Primary production/Photosynthesis; Protein per cell; Protein per surface area; Red Sea; Registration number of species; Replicate; Respiration; Respiration rate, oxygen; Salinity; Single species; Species; Stylophora pistillata; Superoxide dismutase activity, unit per protein mass; Surface area; Symbiont cell density; Temperate; Temperature; Temperature, water; Treatment; Type; Uniform resource locator/link to reference
    Type: Dataset
    Format: text/tab-separated-values, 1800 data points
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  • 12
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    Sedimentology of core GeoTu_SL110 from the eastern Mediterranean Sea (2016)
    PANGAEA
    In:  Supplement to: Ehrmann, Werner; Schmiedl, Gerhard; Seidel, Martin; Krüger, Stefan; Schulz, Hartmut (2016): A distal 140 ka sediment record of Nile discharge and East African monsoon variability. Climate of the Past, 12(3), 713-727, https://doi.org/10.5194/cp-12-713-2016
    Details
    Publication Date: 2024-02-02
    Description: Clay mineral assemblages in a sediment core from the distal Nile discharge plume off Israel have been used to reconstruct the late Quaternary Nile sediment discharge into the Eastern Mediterranean Sea (EMS). The record spans the last ca. 140 ka. Smectite abundances indicate the influence of the Blue Nile and Atbara that have their headwaters in the volcanic rocks of the Ethiopian highlands. Kaolinite abundances indicate the influence of wadis, which contribute periodically to the suspension load of the Nile. Due to the geographical position, the climate and the sedimentary framework of the EMS is controlled by two climate systems. The long-term climate regime was governed by the African monsoon that caused major humid periods with enhanced sediment discharge at 132 to 〈126 ka (AHP5), 116 to 99 ka (AHP4), and 89 to 77 ka (AHP3). They lasted much longer than the formation of the related sapropel layers S5 (〉2 ka), S4 (3.5 ka) and S3 (5 ka). During the last glacial period (MIS 4-2) the long-term changes of the monsoonal system were superimposed by millennial-scale changes of an intensified mid-latitude glacial system. This climate regime caused short but pronounced drought periods in the Nile catchment, which are linked to Heinrich Events and alternate with more humid interstadials. The clay mineral record further implies that feedback mechanisms between vegetation cover and sediment discharge of the Nile are detectable but of minor importance for the sedimentary record in the southeastern Mediterranean Sea during the investigated African Humid Periods.
    Keywords: AGE; Carbon, organic, total; Chlorite; Clay/Silt ratio; Color, L*, lightness; DEPTH, sediment/rock; GeoTu_SL110; Globigerinoides ruber pink, δ18O; Gravity corer (Kiel type); Illite; Kaolinite; Kaolinite/(Illite+Chlorite) ratio; M51/3; M51/3_SL110; Meteor (1986); Palygorskite; Sand; Silt/clay ratio; SL; Smectite; Smectite/(Illite+Chlorite) ratio
    Type: Dataset
    Format: text/tab-separated-values, 7312 data points
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  • 13
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    Systemic swings in end-Permian climate from Siberian Traps carbon and sulfur outgassing - link to CESM model output (2018)
    PANGAEA
    In:  Supplement to: Black, Benjamin A; Neely, Ryan R; Lamarque, Jean-François; Elkins-Tanton, Linda; Kiehl, Jeffrey T; Shields, Christine A; Mills, Michael; Bardeen, Charles (2018): Systemic swings in end-Permian climate from Siberian Traps carbon and sulfur outgassing. Nature Geoscience, 11(12), 949-954, https://doi.org/10.1038/s41561-018-0261-y
    Details
    Publication Date: 2023-09-09
    Description: Siberian Traps flood basalt magmatism coincided with the end-Permian mass extinction approximately 252 million years ago. Proposed links between magmatism and ecological catastrophe include global warming, global cooling, ozone depletion, and changes in ocean chemistry. However, the critical combinations of environmental changes responsible for global mass extinction are undetermined. In particular, the combined and competing climate effects of sulfur and carbon outgassing remain to be quantified. Here we present model outputs from global climate model simulations of flood basalt outgassing that account for sulfur chemistry and aerosol microphysics with coupled atmosphere and ocean circulation. We consider the effects of sulfur and carbon in isolation and in tandem. We find that coupling with the ocean strongly influences the climate response to flood basalt-scale outgassing. We suggest that sulfur and carbon emissions from the Siberian Traps combined to generate systemic swings in temperature, ocean circulation, and hydrology within a longer-term trend towards a greenhouse world in the early Triassic. Read README.PDF first for a description of the remaining files.
    Type: Dataset
    Format: application/zip, 838.3 MBytes
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  • 14
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    Underway measurements of halocarbons (air) during POSEIDON cruise POS399 in June 2010 (2013)
    PANGAEA
    In:  Supplement to: Fuhlbruegge, Steffen; Krüger, Kirstin; Quack, Birgit; Atlas, Elliot L; Hepach, Helmke; Ziska, Franziska (2013): Impact of the marine atmospheric boundary layer conditions on VSLS abundances in the eastern tropical and subtropical North Atlantic Ocean. Atmospheric Chemistry and Physics, 13(13), 6345-6357, https://doi.org/10.5194/acp-13-6345-2013
    Details
    Publication Date: 2024-07-01
    Description: During the DRIVE (Diurnal and Regional Variability of Halogen Emissions) ship campaign we investigated the variability of the halogenated very short-lived substances (VSLS) bromoform (CHBr3), dibromomethane (CH2Br2) and methyl iodide (CH3I) in the marine atmospheric boundary layer in the eastern tropical and subtropical North Atlantic Ocean during May/June 2010. The highest VSLS mixing ratios were found near the Mauritanian coast and close to Lisbon (Portugal). With backward trajectories we identified predominantly air masses from the open North Atlantic with some coastal influence in the Mauritanian upwelling area, due to the prevailing NW winds. The maximum VSLS mixing ratios above the Mauritanian upwelling were 8.92 ppt for bromoform, 3.14 ppt for dibromomethane and 3.29 ppt for methyl iodide, with an observed maximum range of the daily mean up to 50% for bromoform, 26% for dibromomethane and 56% for methyl iodide. The influence of various meteorological parameters - such as wind, surface air pressure, surface air and surface water temperature, humidity and marine atmospheric boundary layer (MABL) height - on VSLS concentrations and fluxes was investigated. The strongest relationship was found between the MABL height and bromoform, dibromomethane and methyl iodide abundances. Lowest MABL heights above the Mauritanian upwelling area coincide with highest VSLS mixing ratios and vice versa above the open ocean. Significant high anti-correlations confirm this relationship for the whole cruise. We conclude that especially above oceanic upwelling systems, in addition to sea-air fluxes, MABL height variations can influence atmospheric VSLS mixing ratios, occasionally leading to elevated atmospheric abundances. This may add to the postulated missing VSLS sources in the Mauritanian upwelling region (Quack et al., 2007).
    Keywords: 1,1,1,2-Tetrafluoroethane; 1,1,2-Trichloro-1,2,2-trifluoroethane; 1,1-Dichloro-1-fluoroethane; 1,1-Difluoroethane; 1,2-Dibromotetrafluoroethane; 1,2-Dichloroethane; 1,2-Dichlorotetrafluoroethane; 1-Chlor-1,2,2,2-tetrafluorethan; 1-Chloro-1,1-difluoroethane; 23-10; ALTITUDE; Benzene; Bromochlorodifluoromethane; Bromoform; Bromomethane; Carbonyl sulfide; Chlorodibromomethane; Chlorodifluoromethane; Chloroform; Chloromethane; CT; DATE/TIME; Dibromomethane; Dichlorodifluoromethane; Dichloromethane; Dimethyl sulfate; Eastern Tropical North Atlantic; Ethyl nitrate; Event label; Isobutane; Isopentane; Isoprene; Isopropyl nitrate; LATITUDE; LONGITUDE; Methyl acetate; Methyl Chloroform; Methyl iodide; Methyl nitrate; n-Butane; n-Hexane; n-Pentane; n-Propyl nitrate; POS399/2; POS399/2-track; POS399/3; POS399/3-track; Poseidon; Propane; sec-Butyl nitrate; SOPRAN; Surface Ocean Processes in the Anthropocene; Tetrachlormethan; Tetrachloroethylene; Toluene; Trichlorfluormethan; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 7351 data points
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  • 15
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    Underway water measurements of halocarbons during METEOR cruise M91 (2015)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publication Date: 2024-06-25
    Keywords: Bromoiodomethane; Chloroiodomethane; CT; DATE/TIME; DEPTH, water; Dibromochloromethane; Dibromomethane; Diiodomethane; Iodomethane; LATITUDE; LONGITUDE; M91; M91-track; Meteor (1986); SOPRAN; South Pacific Ocean; Surface Ocean Processes in the Anthropocene; Tetrachloromethane; Tribromomethane; Trichloroethane; Trichloromethane; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 658 data points
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  • 16
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    Underway water measurements of halocarbons during POSEIDON cruise POS399 in June 2010 (2014)
    PANGAEA
    In:  Supplement to: Hepach, Helmke; Quack, Birgit; Ziska, Franziska; Fuhlbruegge, Steffen; Atlas, Elliot L; Krüger, Kirstin; Peeken, Ilka; Wallace, Douglas WR (2014): Drivers of diel and regional variations of halocarbon emissions from the tropical North East Atlantic. Atmospheric Chemistry and Physics, 14(3), 1255-1275, https://doi.org/10.5194/acp-14-1255-2014
    Details
    Publication Date: 2024-07-01
    Description: Methyl iodide (CH3I), bromoform (CHBr3) and dibromomethane (CH2Br2), which are produced naturally in the oceans, take part in ozone chemistry both in the troposphere and the stratosphere. The significance of oceanic upwelling regions for emissions of these trace gases in the global context is still uncertain although they have been identified as important source regions. To better quantify the role of upwelling areas in current and future climate, this paper analyzes major factors that influenced halocarbon emissions from the tropical North East Atlantic including the Mauritanian upwelling during the DRIVE expedition. Diel and regional variability of oceanic and atmospheric CH3I, CHBr3 and CH2Br2 was determined along with biological and meteorological parameters at six 24 h-stations. Low oceanic concentrations of CH3I from 0.1-5.4 pmol/L were equally distributed throughout the investigation area. CHBr3 of 1.0-42.4 pmol/L and CH2Br2 of 1.0-9.4 pmol/L were measured with maximum concentrations close to the Mauritanian coast. Atmospheric mixing rations of CH3I of up to 3.3, CHBr3 to 8.9 and CH2Br2 to 3.1 ppt above the upwelling and 1.8, 12.8, respectively 2.2 ppt at a Cape Verdean coast were detected during the campaign. While diel variability in CH3I emissions could be mainly ascribed to oceanic non-biological production, no main driver was identified for its emissions in the entire study region. In contrast, oceanic bromocarbons resulted from biogenic sources which were identified as regional drivers of their sea-to-air fluxes. The diel impact of wind speed on bromocarbon emissions increased with decreasing distance to the coast. The height of the marine atmospheric boundary layer (MABL) was determined as an additional factor influencing halocarbon emissions. Oceanic and atmospheric halocarbons correlated well in the study region and in combination with high oceanic CH3I, CHBr3 and CH2Br2 concentrations, local hot spots of atmospheric halocarbons could solely be explained by marine sources. This conclusion is in contrast with previous studies that hypothesized the occurrence of elevated atmospheric halocarbons over the eastern tropical Atlantic mainly originating from the West-African continent.
    Keywords: 1,1,1-Trichloroethane; 23-10; Bromoiodomethane; Cape Verde; CTD/Rosette; CTD10; CTD17; CTD19; CTD22; CTD5; CTD-RO; CVOO; DATE/TIME; Dibromochloromethane; Dibromomethane; Dichloromethane; Diiodomethane; Event label; Gas chromatography - Mass spectrometry (GC-MS); Iodomethane; LATITUDE; LONGITUDE; OBSE; Observation; POS399/2; POS399/2_308-11; POS399/2_311-19; POS399/2_316-31; POS399/2_317-36; POS399/2_319-43; Poseidon; Sample ID; SOPRAN; Surface Ocean Processes in the Anthropocene; TENATSO; Tetrachloromethane; Tribromomethane; Trichloromethane
    Type: Dataset
    Format: text/tab-separated-values, 1540 data points
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