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  • 1
    Series available for loan
    Series available for loan
    Organischer Kohlenstoff in spätquartären Sedimenten des Arktischen Ozeans : terrigener Eintrag und marine Produktivität (1995)
    Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung
    Associated volumes
    Details Availability
    Call number: ZSP-168-177
    In: Berichte zur Polarforschung
    Type of Medium: Series available for loan
    Pages: II, 178 S. : graph. Darst., Kt.
    ISSN: 0176-5027
    Series Statement: Berichte zur Polarforschung 177
    URL: http://hdl.handle.net/10013/epic.10178
    Language: German
    Note: Zugl.: Bremen, Univ., Diss., 1995
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 2
    Electronic Resource
    Electronic Resource
    A marine microbial consortium apparently mediating anaerobic oxidation of methane (2000)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 407 (2000), S. 623-626 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A large fraction of globally produced methane is converted to CO2 by anaerobic oxidation in marine sediments. Strong geochemical evidence for net methane consumption in anoxic sediments is based on methane profiles, radiotracer experiments and stable carbon isotope data. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35036572
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    Paper (German National Licenses)
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  • 3
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    Age determination and n-Alkane concentration of Arctic Ocean sediment cores (2001)
    PANGAEA
    In:  Supplement to: Schubert, Carsten J; Stein, Ruediger; Calvert, Stephen E (2001): Tracking nutrient and productivity variations over the Last Deglaciation in the Arctic Ocean. Paleoceanography, 16(2), 199-211, https://doi.org/10.1029/2000PA000503
    Details
    Publication Date: 2023-09-02
    Description: We have reconstructed the surface water environment of the Arctic Ocean over the last ~ 50,000 years using measurements of the organic nitrogen and carbon isotope ratios, carbonate and total organic carbon concentrations (TOC), and terrestrial biomarkers (lignin and long-chain n-alkanes) in four multicores. Variations in nitrogen isotope ratios that are concordant with TOC and carbonate concentrations (representing foraminifera and excluding ice-rafted-debris) reflect differences in relative nutrient utilization of phytoplankton in the surface waters. However, d15N variations also appear to be dependent on the stratification of the water column and therefore potentially track the exchange of nutrients between deep and surface waters. Low Last Glacial Maximum (LGM) d15N values and higher Holocene values are opposite to those recorded in the Southern Ocean. The Arctic Ocean with higher nutrient utilization today compared to the LGM therefore acts as a counterpart to the Southern Ocean, although the global impact on carbon dioxide variations compared to the Southern Ocean is probably low.
    Keywords: AWI_Paleo; Paleoenvironmental Reconstructions from Marine Sediments @ AWI
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 4
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    Delta 13C hydrocarbon, geochemistry of pore water sediment and physical oceanography (CTD) off the Vesteralen coast, northern Norway (2017)
    PANGAEA
    In:  Supplement to: Sauer, Simone; Knies, Jochen; Lepland, Aivo; Chand, S; Eichinger, Florian; Schubert, Carsten J (2015): Hydrocarbon sources of cold seeps off the Vesteralen coast, northern Norway. Chemical Geology, 417, 371-382, https://doi.org/10.1016/j.chemgeo.2015.10.025
    Details
    Publication Date: 2023-09-02
    Description: We investigated active methane seeps in a water depth of 200 m in the Hola area off the coast of Vesteralen, northern Norway, to assess (1) hydrocarbon sources, (2) migration pathways and (3) the influence of hydrocarbon seepage on sediment pore water and water column chemistry. The seepage area is characterised by the presence of gas flares in the water column as revealed by hydro acoustic surveys and elevated methane concentrations of up to 42 nM ca. 5 m above the seafloor. Pore water analyses of three gravity cores from the seepage area show varying depths of the sulphate-methane-transition zone (SMTZ) between 80 cm and 〉 250 cm indicating spatially heterogeneous methane ascent. The isotopic composition of methane (d13C from - 40per mil to - 63per mil and d2H from - 191per mil to - 225per mil) and d13C depth profiles of methane and dissolved inorganic carbon show that the hydrocarbons are predominantly of thermogenic origin, consistent with d13C values of C2 to C4 hydrocarbons. Isotope data also indicate considerable biodegradation of propane. Seismic profiles from the study area reveal major faults and steeply dipping unconformities between the basement and overlying Mesozoic sedimentary rocks. We propose that these act as migration pathways for the hydrocarbons from late Jurassic to early Cretaceous source rocks.
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 5
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    Concentration and distribution of GDGTs in SPM from Lake Tanganyika (2012)
    PANGAEA
    In:  Supplement to: Schouten, Stefan; Rijpstra, W Irene C; Durisch-Kaiser, Edith; Schubert, Carsten J; Sinninghe Damsté, Jaap S (2012): Distribution of glycerol dialkyl glycerol tetraether lipids in the water column of Lake Tanganyika. Organic Geochemistry, 53, 34-37, https://doi.org/10.1016/j.orggeochem.2012.01.009
    Details
    Publication Date: 2023-09-02
    Description: We studied the distribution of glycerol dialkyl glycerol tetraethers (GDGTs) in suspended particulate matter from the water column of Lake Tanganyika (East Africa), where sediment studies had shown the applicability of the TEX86 proxy for reconstructing surface lake water temperature. GDGTs, in particular crenarchaeol, showed maximum abundance within the suboxic zone (100-180 m), suggesting that this is the preferred niche of ammonia-oxidizing Thaumarchaeota. Despite evidence for anaerobic methane oxidation in deep anoxic water (300-1200 m) no unambiguous evidence for an imprint of methanotrophic archaea on GDGT distribution was found. Comparison of TEX86 and BIT indices with those of surface sediments suggests that the sedimentary GDGTs are derived predominantly from the oxic zone and suboxic zone of the lake.
    Keywords: Acyclic glycerol dialkyl glycerol tetraether; Branched and isoprenoid tetraether index; Branched glycerol dialkyl glycerol tetraether; Calculated, TEX86; Crenarchaeol; DEPTH, water; Glycerol dialkyl glycerol tetraether; Lake_Tanganyika_WS; NIOZ_UU; NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University; Oxygen; Temperature, water; Temperature, water, interpolated; Tetraether index of 86 carbon atoms; Water sample; WS
    Type: Dataset
    Format: text/tab-separated-values, 54 data points
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  • 6
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    Organic geochemistry of sediment core PS2165-5 (1996)
    PANGAEA
    Details
    Publication Date: 2023-09-02
    Keywords: ARK-VIII/3; AWI_Paleo; Carbon, total; DEPTH, sediment/rock; Element analyser CHN; Element analysis CHN, carbonate free sediment; Gakkel Ridge, Arctic Ocean; Hydrogen index, mass HC, per unit mass total organic carbon; MUC; MultiCorer; Nitrogen, total; Oxygen index, mass CO2, per unit mass total organic carbon; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS19/159; PS19 ARCTIC91; PS2165-5; Pyrolysis temperature maximum; Quaternary Environment of the Eurasian North; QUEEN; Rock eval pyrolysis (Behar et al., 2001)
    Type: Dataset
    Format: text/tab-separated-values, 150 data points
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  • 7
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    Organic geochemistry of sediment core PS2175-4 (1996)
    PANGAEA
    Details
    Publication Date: 2023-09-02
    Keywords: Amundsen Basin; ARK-VIII/3; AWI_Paleo; Carbon, total; DEPTH, sediment/rock; Element analyser CHN; Element analysis CHN, carbonate free sediment; Hydrogen index, mass HC, per unit mass total organic carbon; MUC; MultiCorer; Nitrogen, total; Oxygen index, mass CO2, per unit mass total organic carbon; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS19/172; PS19 ARCTIC91; PS2175-4; Pyrolysis temperature maximum; Quaternary Environment of the Eurasian North; QUEEN; Rock eval pyrolysis (Behar et al., 2001)
    Type: Dataset
    Format: text/tab-separated-values, 128 data points
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  • 8
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    Organic geochemistry of sediment core PS2163-1 (1996)
    PANGAEA
    Details
    Publication Date: 2023-09-02
    Keywords: ARK-VIII/3; AWI_Paleo; Carbon, total; DEPTH, sediment/rock; Element analyser CHN; Element analysis CHN, carbonate free sediment; Gakkel Ridge, Arctic Ocean; Hydrogen index, mass HC, per unit mass total organic carbon; MUC; MultiCorer; Nitrogen, total; Oxygen index, mass CO2, per unit mass total organic carbon; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS19/157; PS19 ARCTIC91; PS2163-1; Pyrolysis temperature maximum; Quaternary Environment of the Eurasian North; QUEEN; Rock eval pyrolysis (Behar et al., 2001)
    Type: Dataset
    Format: text/tab-separated-values, 168 data points
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  • 9
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    Organic geochemistry of sediment core PS2171-2 (1996)
    PANGAEA
    Details
    Publication Date: 2023-09-02
    Keywords: Amundsen Basin; ARK-VIII/3; AWI_Paleo; Calcium carbonate; Carbon, organic, total; Carbon, total; DEPTH, sediment/rock; Element analyser CHN; Element analysis CHN, carbonate free sediment; Hydrogen index, mass HC, per unit mass total organic carbon; MUC; MultiCorer; Nitrogen, total; Oxygen index, mass CO2, per unit mass total organic carbon; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS19/166; PS19 ARCTIC91; PS2171-2; Pyrolysis temperature maximum; Quaternary Environment of the Eurasian North; QUEEN; Rock eval pyrolysis (Behar et al., 2001)
    Type: Dataset
    Format: text/tab-separated-values, 379 data points
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  • 10
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    Organic geochemistry of sediment core PS2159-3 (1996)
    PANGAEA
    Details
    Publication Date: 2023-09-02
    Keywords: ARK-VIII/3; AWI_Paleo; Carbon, total; DEPTH, sediment/rock; Element analyser CHN; Element analysis CHN, carbonate free sediment; Hydrogen index, mass HC, per unit mass total organic carbon; MUC; MultiCorer; Nansen Basin; Nitrogen, total; Oxygen index, mass CO2, per unit mass total organic carbon; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS19/152; PS19 ARCTIC91; PS2159-3; Pyrolysis temperature maximum; Quaternary Environment of the Eurasian North; QUEEN; Rock eval pyrolysis (Behar et al., 2001)
    Type: Dataset
    Format: text/tab-separated-values, 177 data points
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