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  • 1D_TDC01; 1D_TDC02; 1D_TDC03; 1D_TDC04; 1D_TDC05; 1D_TDC06; 1D_TDC07; 1D_TDC08; 1D_TDC09; 1D_TDC10; 1D_TDC11; 1D_TDC12; 1D_TDC14; 1D_TDC15; 1D_TDC16; 1D_TDC18; 1D_TDC19; 1D_TDC20; 1D_TDC22; 1D_TDC23; 1D_TDC26; AWI_GeoPhy; Binary Object; Clock skew; Code; Comment; Cruise/expedition; Date/time end; Date/time start; ELEVATION; Event label; Hydrophone, serial number; Hydrophone gain; Hydrophone polarity; Hydrophone type; LATITUDE; LONGITUDE; Marine Geophysics @ AWI; MSM20/020-2, MSM24_830-1; MSM20/021-2, MSM24_831-1; MSM20/022-2, MSM24_832-1; MSM20/023-2, MSM24_833-1; MSM20/024-2, MSM24_842-1; MSM20/025-2, MSM24_834-2; MSM20/026-2, MSM24_835-1; MSM20/027-2, MSM24_836-2; MSM20/027-2, MSM24_837-1; MSM20/028-2, MSM24_838-1; MSM20/029-2, MSM24_839-2; MSM20/030-2, MSM24_840-1; MSM20/031-2, MSM24_843-1; MSM20/033-2, MSM24_854-1; MSM20/035-2, MSM24_853-1; MSM20/037-2, MSM24_844-1; MSM20/038-2, MSM24_845-2; MSM20/039-2, MSM24_852-1; MSM20/041-2, MSM24_850-1; MSM20/042-1, MSM24_849-1; MSM20/046-2, MSM24_846-1; OBS; Ocean bottom seismometer; Optional event label; Principal investigator; Priority Programme 1375 SAMPLE: South Atlantic Margin Processes and Links with Onshore Evolution; Project; Recorder, serial number; Recorder type; Sampling rate; Seismometer, serial number; Seismometer gain; Seismometer type; SPP1375; Station label; Tristan da Cunha, South Atlantic Ocean  (1)
  • 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane, per unit mass total organic carbon; 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane per unit sediment mass; 24-ethylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Ethylcholest-5-en-3beta-ol per unit sediment mass; 24-Methylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Methylcholest-5-en-3beta-ol per unit sediment mass; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit mass total organic carbon; 24-Methylcholesta-5,22E-dien-3beta-ol per unit sediment mass; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol per unit sediment mass; Alkenone, per unit mass total organic carbon; Alkenone per unit sediment mass; Arctic Ocean; ARK-XXVIII/4 ALEX2014; AWI_Paleo; Carbon, organic, total; DEPTH, sediment/rock; Element analyser CHN, LECO; Gas chromatography; Gas chromatography - Mass spectrometry (GC-MS); GC; Gravity corer; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS87; PS87/090-1  (1)
  • 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane, per unit mass total organic carbon; 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane per unit sediment mass; 24-ethylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Ethylcholest-5-en-3beta-ol per unit sediment mass; 24-Methylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Methylcholest-5-en-3beta-ol per unit sediment mass; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit mass total organic carbon; 24-Methylcholesta-5,22E-dien-3beta-ol per unit sediment mass; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol per unit sediment mass; Alkenone, per unit mass total organic carbon; Alkenone per unit sediment mass; Arctic Ocean; ARK-XXVIII/4 ALEX2014; AWI_Paleo; Carbon, organic, total; DEPTH, sediment/rock; Element analyser CHN, LECO; Gas chromatography; Gas chromatography - Mass spectrometry (GC-MS); GC; Gravity corer; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS87; PS87/094-1  (1)
  • 550.28  (1)
Collection
Keywords
Publisher
Years
  • 1
    facet.materialart.
    Unknown
    Biomarker proxies on sediment core PS87/090-1 (2015)
    PANGAEA
    Details
    Publication Date: 2024-05-28
    Keywords: 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane, per unit mass total organic carbon; 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane per unit sediment mass; 24-ethylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Ethylcholest-5-en-3beta-ol per unit sediment mass; 24-Methylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Methylcholest-5-en-3beta-ol per unit sediment mass; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit mass total organic carbon; 24-Methylcholesta-5,22E-dien-3beta-ol per unit sediment mass; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol per unit sediment mass; Alkenone, per unit mass total organic carbon; Alkenone per unit sediment mass; Arctic Ocean; ARK-XXVIII/4 ALEX2014; AWI_Paleo; Carbon, organic, total; DEPTH, sediment/rock; Element analyser CHN, LECO; Gas chromatography; Gas chromatography - Mass spectrometry (GC-MS); GC; Gravity corer; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS87; PS87/090-1
    Type: Dataset
    Format: text/tab-separated-values, 65 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
    facet.materialart.
    Unknown
    Biomarker proxies on sediment core PS87/094-1 (2015)
    PANGAEA
    Details
    Publication Date: 2024-05-28
    Keywords: 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane, per unit mass total organic carbon; 2,6,10,14-Tetramethyl-7-(3-methylpent-4-enyl)pentadecane per unit sediment mass; 24-ethylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Ethylcholest-5-en-3beta-ol per unit sediment mass; 24-Methylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-Methylcholest-5-en-3beta-ol per unit sediment mass; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit mass total organic carbon; 24-Methylcholesta-5,22E-dien-3beta-ol per unit sediment mass; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol per unit sediment mass; Alkenone, per unit mass total organic carbon; Alkenone per unit sediment mass; Arctic Ocean; ARK-XXVIII/4 ALEX2014; AWI_Paleo; Carbon, organic, total; DEPTH, sediment/rock; Element analyser CHN, LECO; Gas chromatography; Gas chromatography - Mass spectrometry (GC-MS); GC; Gravity corer; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS87; PS87/094-1
    Type: Dataset
    Format: text/tab-separated-values, 39 data points
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
  • 3
    facet.materialart.
    Unknown
    Project ISOLDE: DEPAS ocean-bottom seismometer operations around Tristan da Cunha in 2012-2013 (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-12
    Description: According to classic plume theory, the Tristan da Cunha mantle plume played a major role in the rifting of the South Atlantic margins by impinging at the base of the continental lithosphere shortly before or during the breakup of the South Atlantic. Onshore the Tristan mantle plume is associated with the emplacement of the Parana-Etendeka flood basalt province ~132 Ma, and offshore with the age-progressive Walvis Ridge and associated young seamount province. The global data is lacking coverage and therefore resolution around the Tristan da Cunha for shallower mantle depths. The search for deep-reaching geophysical/thermal anomalies beneath Tristan da Cunha was the starting point for a multi-disciplinary geophysical experiment to acquire passive marine electromagnetic, seismic and bathymetric data within the framework of the SPP-1375 “South Atlantic Margin Processes and Links with onshore Evolution” (SAMPLE) funded by the German Science foundation. The experiment included two expeditions with the German research vessel MARIA S. MERIAN in 2012 and 2013. Between February 2012 and January 2013, a network of 24 ocean bottom seismometers (OBS) from the German DEPAS pool (Deutscher Geräte-Pool für Amphibische Seismologie) and 26 ocean-bottom magneto-telluric stations from GEOMAR Kiel and the University of Tokyo were deployed around the archipelago of Tristan da Cunha. The seismological stations are equipped with a Güralp CMG-40T wideband seismometer (60 s) incorporated in a titanium pressure housing, a hydrophone, and a GEOLON MCS (Marine Compact Seismocorder) data logger from SEND GmbH Hamburg, Germany. Each sensor channel is sampled at 50 Hz (2 OBS at 100 Hz), preamplifier gain of the hydrophone channel is 4 and 1 for the three seismometer components. The seismometers are connected to a cardanic levelling mechanism, which was activated every 21 days to level the sensors. Based on previous experiments and triangulation of some stations, the accuracy of the positions is estimated to 500 m. To complement the ocean-bottom network and the existing observatory on Tristan da Cunha (TRIS), two land seismometers and one magnetotelluric station were installed on Nightingale Island located southwest of the main island each of which was equipped with a Güralp-3ESP seismometer (60 s) and an EarthData data logger. As recording parameters, we chose 100 Hz sampling rate and low preamplifier gain (0.4). One of the stations (NIG01) recorded earthquake data for the entire year, while the second station failed after few days due to water damage. Unfortunately, the permanent station TRIS failed also during the experiment.
    Keywords: 1D_TDC01; 1D_TDC02; 1D_TDC03; 1D_TDC04; 1D_TDC05; 1D_TDC06; 1D_TDC07; 1D_TDC08; 1D_TDC09; 1D_TDC10; 1D_TDC11; 1D_TDC12; 1D_TDC14; 1D_TDC15; 1D_TDC16; 1D_TDC18; 1D_TDC19; 1D_TDC20; 1D_TDC22; 1D_TDC23; 1D_TDC26; AWI_GeoPhy; Binary Object; Clock skew; Code; Comment; Cruise/expedition; Date/time end; Date/time start; ELEVATION; Event label; Hydrophone, serial number; Hydrophone gain; Hydrophone polarity; Hydrophone type; LATITUDE; LONGITUDE; Marine Geophysics @ AWI; MSM20/020-2, MSM24_830-1; MSM20/021-2, MSM24_831-1; MSM20/022-2, MSM24_832-1; MSM20/023-2, MSM24_833-1; MSM20/024-2, MSM24_842-1; MSM20/025-2, MSM24_834-2; MSM20/026-2, MSM24_835-1; MSM20/027-2, MSM24_836-2; MSM20/027-2, MSM24_837-1; MSM20/028-2, MSM24_838-1; MSM20/029-2, MSM24_839-2; MSM20/030-2, MSM24_840-1; MSM20/031-2, MSM24_843-1; MSM20/033-2, MSM24_854-1; MSM20/035-2, MSM24_853-1; MSM20/037-2, MSM24_844-1; MSM20/038-2, MSM24_845-2; MSM20/039-2, MSM24_852-1; MSM20/041-2, MSM24_850-1; MSM20/042-1, MSM24_849-1; MSM20/046-2, MSM24_846-1; OBS; Ocean bottom seismometer; Optional event label; Principal investigator; Priority Programme 1375 SAMPLE: South Atlantic Margin Processes and Links with Onshore Evolution; Project; Recorder, serial number; Recorder type; Sampling rate; Seismometer, serial number; Seismometer gain; Seismometer type; SPP1375; Station label; Tristan da Cunha, South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 484 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 4
    facet.materialart.
    Unknown
    Bathymetry Beneath Ice Shelves of Western Dronning Maud Land, East Antarctica, and Implications on Ice Shelf Stability (2021)
    Details
    Publication Date: 2021-07-04
    Description: Antarctica's ice shelves play a key role in stabilizing the ice streams that feed them. Since basal melting largely depends on ice‐ocean interactions, it is vital to attain consistent bathymetry models to estimate water and heat exchange beneath ice shelves. We have constructed bathymetry models beneath the ice shelves of western Dronning Maud Land by inverting airborne gravity data and incorporating seismic, multibeam, and radar depth references. Our models reveal deep glacial troughs beneath the ice shelves and terminal moraines close to the continental shelf breaks, which currently limit the entry of Warm Deep Water from the Southern Ocean. The ice shelves buttress a catchment that comprises an ice volume equivalent to nearly 1 m of eustatic sea level rise, partly susceptible to ocean forcing. Changes in water temperature and thermocline depth may accelerate marine‐based ice sheet drainage and constitute an underestimated contribution to future global sea level rise.
    Description: Plain Language Summary: The grounded ice sheets of Antarctica are stabilized by floating ice shelves. Any loss in ice shelf mass is matched by an increase in ice sheet drainage, which contributes to rising sea level. The ice shelves of western Dronning Maud Land are currently in balance with an inland ice volume that has the potential to raise global sea level by nearly 1 m. Ice shelves lose most of their mass from their bases when warm water intrudes from the surrounding ocean. The extent to which this occurs depends on the depth and shape of the seafloor beneath the ice shelves. We have modeled water depths beneath the ice shelves of Dronning Maud Land using airborne gravity data and depth measurements from seismic, multibeam, and radar data. Our bathymetric models show deep troughs beneath the ice shelves and shallow sills close to the continental shelf. These sills currently limit water mass exchange with Warm Deep Water from the Southern Ocean and so protect the ice shelves from significant melting at their bases. A changing climate with increasing ocean temperatures or a shallowing of warm water masses may increase ice shelf melting and lead to an increased sea level contribution.
    Description: Key Points: We present subglacial topography models beneath Ekström, Atka, Jelbart, Fimbul, and Vigrid ice shelves. Water cavities beneath ice shelves of wDML are secluded due to moraine formations at LGM and subsequent shallow water entry points. Ice shelves are currently protected by sills but are highly sensitive to future warming ocean temperatures and changing thermocline depth.
    Keywords: 551.31 ; 550.28 ; subglacial topography ; bathymetry model ; gravity inversion ; Fimbul ; Jelbart ; Ekström
    Type: article
    Location Call Number Expected Availability
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    CITATION GEO-LEO
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