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  • ANT-XXIX/4; AWI_Paleo; Center for Marine Environmental Sciences; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Elevation of event; Event label; Latitude of event; Longitude of event; MARUM; Methane; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS81; PS81/281-1; PS81/284-3; PS81/286-1; South Atlantic Ocean  (1)
  • ANT-XXIX/4; Carbon, inorganic, dissolved; Date/Time of event; DEPTH, sediment/rock; Elevation of event; Event label; GC; Gravity corer; Latitude of event; Longitude of event; Methane; Polarstern; PS81; PS81/258-1; PS81/280-1; PS81/281-2; PS81/284-1; South Atlantic Ocean; Sulfate; δ13C, dissolved inorganic carbon; δ13C, methane  (1)
  • AWI_Paleo; Center for Marine Environmental Sciences; MARUM; Paleoenvironmental Reconstructions from Marine Sediments @ AWI  (1)
  • Altimeter; ANT-XXIX/4; Attenuation, optical beam transmission; Calculated; Computed; Conductivity; CTD, Sea-Bird SBE 911plus; CTD/Rosette; CTD-RO; Date/Time of event; Density, sigma-theta (0); DEPTH, water; Elevation of event; Event label; Fluorescence, chlorophyll; Fluorometer, WET Labs ECO AFL/FL; Height above sea floor/altitude; Latitude of event; Longitude of event; Oxygen; Oxygen sensor, SBE 43; Polarstern; Pressure, water; PS81; PS81/281-1; PS81/282-1; PS81/284-3; PS81/286-1; Salinity; Sample ID; South Atlantic Ocean; Temperature, water; Temperature, water, potential; Transmissometer, WET Labs, C-Star  (1)
  • Author(s); AWI_PhyOce; Campaign; Date/time end; Date/time start; Method comment; Number of observations; Ocean and sea region; Persistent Identifier; Physical Oceanography @ AWI; Principal investigator; Quality code; Uniform resource locator/link to image; Uniform resource locator/link to reference  (1)
  • C1/C2 hydrocarbon ratio; C1 hydrocarbons; C2 hydrocarbons; C3 hydrocarbons; C4 hydrocarbons; Carbon dioxide; Center for Marine Environmental Sciences; Comment; Event label; Gas chromatography; GC; GeoB16716-2; GeoB16722-2; GeoB16725-1; GeoB16736-1; GeoB16746-1; GeoB16764-1; GeoB16771-1; GeoB16772-1; GeoB16788-1; GeoB16788-2; Gravity corer; iso-C4 hydrocarbons; MARUM; MEMO; Number; SO222; Sonne; Δδ13C, methane; δ13C, methane  (1)
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  • 1
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    Unbekannt
    Active methane seepage in the Southern Ocean, off the sub-Antarctic island of South Georgia (2014)
    PANGAEA
    In:  Supplement to: Römer, Miriam; Torres, Marta E; Kasten, Sabine; Kuhn, Gerhard; Graham, Alastair G C; Mau, Susan; Little, Crispin T S; Linse, Katrin; Pape, Thomas; Geprägs, Patrizia; Fischer, David; Wintersteller, Paul; Marcon, Yann; Rethemeyer, Janet; Bohrmann, Gerhard; Shipboard scientific party ANT-XXIX/4 (2014): First evidence of widespread active methane seepage in the Southern Ocean, off the sub-Antarctic island of South Georgia. Earth and Planetary Science Letters, 403, 166-177, https://doi.org/10.1016/j.epsl.2014.06.036
    Details
    Publikationsdatum: 2023-03-16
    Beschreibung: An extensive submarine cold-seep area was discovered on the northern shelf of South Georgia during R/V Polarstern cruise ANT-XXIX/4 in spring 2013. Hydroacoustic surveys documented the presence of 133 gas bubble emissions, which were restricted to glacially-formed fjords and troughs. Video-based sea floor observations confirmed the sea floor origin of the gas emissions and spatially related microbial mats. Effective methane transport from these emissions into the hydrosphere was proven by relative enrichments of dissolved methane in near-bottom waters. Stable carbon isotopic signatures pointed to a predominant microbial methane formation, presumably based on high organic matter sedimentation in this region. Although known from many continental margins in the world's oceans, this is the first report of an active area of methane seepage in the Southern Ocean. Our finding of substantial methane emission related to a trough and fjord system, a topographical setting that exists commonly in glacially-affected areas, opens up the possibility that methane seepage is a more widespread phenomenon in polar and sub-polar regions than previously thought.
    Schlagwort(e): AWI_Paleo; Center for Marine Environmental Sciences; MARUM; Paleoenvironmental Reconstructions from Marine Sediments @ AWI
    Materialart: Dataset
    Format: application/zip, 5 datasets
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATEN PANGAEA
  • 2
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    Unbekannt
    Physical oceanography on board of POLARSTERN (1983-11-22 to 2016-02-14) (2016)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven | Supplement to: Driemel, Amelie; Fahrbach, Eberhard; Rohardt, Gerd; Beszczynska-Möller, Agnieszka; Boetius, Antje; Budéus, Gereon; Cisewski, Boris; Engbrodt, Ralph; Gauger, Steffen; Geibert, Walter; Geprägs, Patrizia; Gerdes, Dieter; Gersonde, Rainer; Gordon, Arnold L; Grobe, Hannes; Hellmer, Hartmut H; Isla, Enrique; Jacobs, Stanley S; Janout, Markus A; Jokat, Wilfried; Klages, Michael; Kuhn, Gerhard; Meincke, Jens; Ober, Sven; Østerhus, Svein; Peterson, Ray G; Rabe, Benjamin; Rudels, Bert; Schauer, Ursula; Schumacher, Stefanie; Schröder, Michael; Sieger, Rainer; Sildam, Jüri; Soltwedel, Thomas; Stangeew, Elena; Stein, Manfred; Strass, Volker H; Thiede, Jörn; Tippenhauer, Sandra; Veth, Cornelis; von Appen, Wilken-Jon; Weirig, Marie-France; Wisotzki, Andreas; Wolf-Gladrow, Dieter A; Kanzow, Torsten (2017): From pole to pole: 33 years of physical oceanography onboard R/V Polarstern. Earth System Science Data, 9(1), 211-220, https://doi.org/10.5194/essd-9-211-2017
    Details
    Publikationsdatum: 2023-10-18
    Beschreibung: Measuring temperature and salinity profiles in the world's oceans is crucial to understanding ocean dynamics and its influence on the heat budget, the water cycle, the marine environment and on our climate. Since 1983 the German research vessel and icebreaker Polarstern has been the platform of numerous CTD (conductivity, temperature, depth instrument) deployments in the Arctic and the Antarctic. We report on a unique data collection spanning 33 years of polar CTD data. In total 131 data sets (1 data set per cruise leg) containing data from 10 063 CTD casts are now freely available. During this long period five CTD types with different characteristics and accuracies have been used. Therefore the instruments and processing procedures (sensor calibration, data validation, etc.) are described in detail. This compilation is special not only with regard to the quantity but also the quality of the data - the latter indicated for each data set using defined quality codes. The complete data collection includes a number of repeated sections for which the quality code can be used to investigate and evaluate long-term changes. Beginning with 2010, the salinity measurements presented here are of the highest quality possible in this field owing to the introduction of the OPTIMARE Precision Salinometer.
    Schlagwort(e): Author(s); AWI_PhyOce; Campaign; Date/time end; Date/time start; Method comment; Number of observations; Ocean and sea region; Persistent Identifier; Physical Oceanography @ AWI; Principal investigator; Quality code; Uniform resource locator/link to image; Uniform resource locator/link to reference
    Materialart: Dataset
    Format: text/tab-separated-values, 1695 data points
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATEN PANGAEA
  • 3
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    Unbekannt
    Physical oceanography during POLARSTERN cruise ANT-XXIX/4 (2016)
    PANGAEA
    Details
    Publikationsdatum: 2024-06-26
    Beschreibung: Recent studies have suggested that the marine contribution of methane from shallow regions and melting marine terminating glaciers may have been underestimated. Here we report on methane sources and potential sinks associated with methane seeps in Cumberland Bay, South Georgia's largest fjord system. The average organic carbon content in the upper 8 meters of the sediment is around 0.65 wt.%; this observation combined with Parasound data suggest that the methane gas accumulations probably originate from peat-bearing sediments currently located several tens of meters below the seafloor. Only one of our cores indicates upward advection; instead most of the methane is transported via diffusion. Sulfate and methane flux estimates indicate that a large fraction of methane is consumed by anaerobic oxidation of methane (AOM). Carbon cycling at the sulfate-methane transition (SMT) results in a marked fractionation of the d13C-CH4 from an estimated source value of -65 per mil to a value as low as -96 per mil just below the SMT. Methane concentrations in sediments are high, especially close to the seepage sites (~40 mM); however, concentrations in the water column are relatively low (max. 58 nM) and can be observed only close to the seafloor. Methane is trapped in the lowermost water mass, however, measured microbial oxidation rates reveal very low activity with an average turnover of 3.1 years. We therefore infer that methane must be transported out of the bay in the bottom water layer. A mean sea-air flux of only 0.005 nM/m²s confirms that almost no methane reaches the atmosphere.
    Schlagwort(e): Altimeter; ANT-XXIX/4; Attenuation, optical beam transmission; Calculated; Computed; Conductivity; CTD, Sea-Bird SBE 911plus; CTD/Rosette; CTD-RO; Date/Time of event; Density, sigma-theta (0); DEPTH, water; Elevation of event; Event label; Fluorescence, chlorophyll; Fluorometer, WET Labs ECO AFL/FL; Height above sea floor/altitude; Latitude of event; Longitude of event; Oxygen; Oxygen sensor, SBE 43; Polarstern; Pressure, water; PS81; PS81/281-1; PS81/282-1; PS81/284-3; PS81/286-1; Salinity; Sample ID; South Atlantic Ocean; Temperature, water; Temperature, water, potential; Transmissometer, WET Labs, C-Star
    Materialart: Dataset
    Format: text/tab-separated-values, 8881 data points
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATEN PANGAEA
  • 4
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    Unbekannt
    Pore water chemistry of sediment cores obtained during POLARSTERN cruise ANT-XXIX/4 (2016)
    PANGAEA
    Details
    Publikationsdatum: 2024-06-26
    Schlagwort(e): ANT-XXIX/4; Carbon, inorganic, dissolved; Date/Time of event; DEPTH, sediment/rock; Elevation of event; Event label; GC; Gravity corer; Latitude of event; Longitude of event; Methane; Polarstern; PS81; PS81/258-1; PS81/280-1; PS81/281-2; PS81/284-1; South Atlantic Ocean; Sulfate; δ13C, dissolved inorganic carbon; δ13C, methane
    Materialart: Dataset
    Format: text/tab-separated-values, 294 data points
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATEN PANGAEA
  • 5
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    Unbekannt
    (Table 1) Distributions of light hydrocarbons and CO2, C1/C2 ratios, and stable C isotope signatures of CH4 in hydrate-bound gas and dissolved gas (2014)
    PANGAEA
    Details
    Publikationsdatum: 2024-06-28
    Schlagwort(e): C1/C2 hydrocarbon ratio; C1 hydrocarbons; C2 hydrocarbons; C3 hydrocarbons; C4 hydrocarbons; Carbon dioxide; Center for Marine Environmental Sciences; Comment; Event label; Gas chromatography; GC; GeoB16716-2; GeoB16722-2; GeoB16725-1; GeoB16736-1; GeoB16746-1; GeoB16764-1; GeoB16771-1; GeoB16772-1; GeoB16788-1; GeoB16788-2; Gravity corer; iso-C4 hydrocarbons; MARUM; MEMO; Number; SO222; Sonne; Δδ13C, methane; δ13C, methane
    Materialart: Dataset
    Format: text/tab-separated-values, 129 data points
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATEN PANGAEA
  • 6
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    Unbekannt
    (Fig. 7) Methane measured on water bottle samples during POLARSTERN cruise ANT-XXIX/4 (2014)
    PANGAEA
    Details
    Publikationsdatum: 2024-06-26
    Schlagwort(e): ANT-XXIX/4; AWI_Paleo; Center for Marine Environmental Sciences; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Elevation of event; Event label; Latitude of event; Longitude of event; MARUM; Methane; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS81; PS81/281-1; PS81/284-3; PS81/286-1; South Atlantic Ocean
    Materialart: Dataset
    Format: text/tab-separated-values, 36 data points
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    DATEN PANGAEA
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