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  • 2020-2024  (39)
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  • 1
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    Seafloor evidence for pre-shield volcanism above the Tristan da Cunha mantle plume (2020)
    Nature Research
    Details
    Publication Date: 2023-02-08
    Description: Tristan da Cunha is assumed to be the youngest subaerial expression of the Walvis Ridge hot spot. Based on new hydroacoustic data, we propose that the most recent hot spot volcanic activity occurs west of the island. We surveyed relatively young intraplate volcanic fields and scattered, probably monogenetic, submarine volcanoes with multibeam echosounders and sub-bottom profilers. Structural and zonal GIS analysis of bathymetric and backscatter results, based on habitat mapping algorithms to discriminate seafloor features, revealed numerous previously-unknown volcanic structures. South of Tristan da Cunha, we discovered two large seamounts. One of them, Isolde Seamount, is most likely the source of a 2004 submarine eruption known from a pumice stranding event and seismological analysis. An oceanic core complex, identified at the intersection of the Tristan da Cunha Transform and Fracture Zone System with the Mid-Atlantic Ridge, might indicate reduced magma supply and, therefore, weak plume-ridge interaction at present times.
    Type: Article , PeerReviewed
    Format: text
    Format: text
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    PAPER (OCEANREP)
  • 2
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    GEA IV 2013-15 radar ice thickness in eastern Dronning Maud Land (2021)
    PANGAEA
    Details
    Publication Date: 2023-11-22
    Description: Ice thickness from radar data over eastern Dronning Maud Land, with geographical coordinates and dates of acquisition in 2013, 2014, and 2015. Airborne acquisition was completed with aircraft POLAR 6 as part of the GEA collaborative project between the Federal Institute for Geosciences and Natural Resources and Alfred Wegener Institute.
    Keywords: AC; Aircraft; AWI_GeoPhy; DATE/TIME; Dronning Maud Land; Event label; GEA-IV_P6_2013; GEA-IV_P6_2013_20131209; GEA-IV_P6_2013_20131210; GEA-IV_P6_2013_20131211; GEA-IV_P6_2013_20131212; GEA-IV_P6_2013_20131213; GEA-IV_P6_2013_20131215; GEA-IV_P6_2014; GEA-IV_P6_2014_20141218; GEA-IV_P6_2014_20141226; GEA-IV_P6_2014_20141227; GEA-IV_P6_2014_20141228; GEA-IV_P6_2014_20141229; GEA-IV_P6_2014_20141230; GEA-IV_P6_2014_20150102; GEA-IV_P6_2014_20150103; GEA-IV_P6_2014_20150108; GEA-IV_P6_2014_20150109; GEA-IV_P6_2014_20150110; GEA-IV_P6_2014_20150111; GEA-IV_P6_2014_20150112; GEA-IV_P6_2014_20150114; GEA-IV_P6_2014_20150115; GEA-IV_P6_2014_20150121; ice thickness; Ice thickness; LATITUDE; LONGITUDE; Marine Geophysics @ AWI; P6_189_ANTR_2013_2014, WEGAS-IV, CoFi Structure 2012/13; P6_194_ANTR_2014_2015, WEGAS-IV; POLAR 6; radar; Trace Number
    Type: Dataset
    Format: text/tab-separated-values, 248516 data points
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    DATA PANGAEA
  • 3
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    Airborne gravity data across Astrid Ridge, East Antarctica (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-01
    Description: This data set contains airborne gravity data across central Dronning Maud Land, East Antarctica, acquired during the austral summer of 2009/2010 and within the project 'West-East Gondwana Amalgamation and its Separation' (WEGAS). The data span the offshore Astrid Ridge, and parts of the Nivl and Lazarev ice shelves. The survey was conducted using a ZLS Ultrasys Lacoste & Romberg Air/Sea gravimeter S56 installed into - and operated with - the research aircraft Polar 5. Base readings were performed with a handheld gravity meter at the base station Novolazarevskaja and in Cape Town. A ground speed of 130 knots and a time-domain filter of 220 s leads to a spatial resolution of around 7 km. The average crossover error after bias adjustment is 4.2 mGal. When citing this data set, please also cite the associated manuscript: Eisermann, H., Eagles, G. & Jokat, W. Coastal bathymetry in central Dronning Maud Land controls ice shelf stability. Sci Rep 14, 1367 (2024). https://doi.org/10.1038/s41598-024-51882-2.
    Keywords: AC; airborne gravity; Aircraft; Antarctica; Antarctica, East; Astrid Ridge; DATE/TIME; Event label; Free-air gravity anomaly; Gravity; Height; LATITUDE; Lazarev Ice Shelf; Line; LONGITUDE; Nivl Ice Shelf; PGM17 (NGA's Preliminary Geopotential Model 2017); POLAR 5; WEGAS_2009/10; WEGAS_2009/10_02; WEGAS_2009/10_03; WEGAS_2009/10_04; WEGAS_2009/10_05; WEGAS_2009/10_06; WEGAS_2009/10_07; WEGAS_2009/10_08; WEGAS_2009/10_09; WEGAS_2009/10_10; WEGAS_2009/10_11; WEGAS_2009/10_12; WEGAS_2009/10_13; WEGAS_2009/10_14; WEGAS_2009/10_16; WEGAS_2009/10_17; WEGAS_2009/10_18; WEGAS_2009/10_19; WEGAS_2009/10_20; WEGAS_2009/10_21; WEGAS offshore
    Type: Dataset
    Format: text/tab-separated-values, 128088 data points
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    DATA PANGAEA
  • 4
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    Bathymetry beneath ice shelves of western Dronning Maud Land, East Antarctica (2020)
    PANGAEA
    Details
    Publication Date: 2024-01-30
    Description: The lack of consistent and reliable estimates of the bathymetry beneath the ice shelves of western Dronning Maud Land is addressed by inverting airborne gravity data to model the underlying bathymetry. The gravity inversion is supported by known depth reference points from seismic data, multibeam and ice thickness radar data across grounded ice sheets. The dataset comprises seabed and ice base depths of Ekström, Atka, Jelbart, Fimbul and Vigrid ice shelves relative to WGS84.
    Keywords: Bathymetry; BathymetryModel_wDronningMaudLand; Bed elevation; Coordinate, x, relative; Coordinate, y, relative; Dronning Maud Land; gravity inversion; Ice base elevation; LATITUDE; LONGITUDE; subglacial; western Dronning Maud Land
    Type: Dataset
    Format: text/tab-separated-values, 97909 data points
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    DATA PANGAEA
  • 5
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    Modeled bathymetry beneath Roi Baudouin and Borchgrevink ice shelves, East Antarctica (2021)
    PANGAEA
    Details
    Publication Date: 2024-01-30
    Description: The lack of consistent and reliable estimates of the bathymetry beneath the Roi Baudouin and Borchgrevink ice shelves of Dronning Maud Land is addressed by inverting airborne gravity data to model the underlying bathymetry. The bathymetric model presented here is mainly based on geophysical data sets acquired over the course of three consecutive seasons in early 2011, early 2012 and late 2012 using the Alfred Wegener Institute's Basler BT-67 aircraft 'Polar 5' and 'Polar 6' within the research program 'Geodynamic Evolution of East Antarctica' (GEA I – GEA III). The gravity inversion is supported by known depth reference points from multibeam data close to calving fronts and ice thickness radar data across grounded ice sheets. See source data sets. The dataset comprises seabed and ice base depths relative to WGS84 at a reolution of 5 km.
    Keywords: Antarctica; Bed elevation; Coordinate, x, relative; Coordinate, y, relative; Dronning Maud Land; East Antarctica; gravity inversion; Ice base elevation; LATITUDE; LONGITUDE; Model; RoiBaudouin_Borchgrevink; subglacial bathymetry
    Type: Dataset
    Format: text/tab-separated-values, 78508 data points
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    DATA PANGAEA
  • 6
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    Master tracks in different resolutions during POLAR 5 campaign P5_236_RIISERBATHY_22_23 (2023)
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
    Details
    Publication Date: 2024-04-20
    Description: Raw data acquired by GPS1 position sensors on board research aircraft Polar 5 during the campaign P5_236_RIISERBATHY_22_23 were processed to receive a validated master track which can be used as reference of further expedition data. Novatel FlexPak6 GPS receiver was used as navigation sensors during the campaign. Data were downloaded from DAVIS SHIP data base (https://dship.awi.de) with a resolution of 1 sec. Processed data are provided as a master track with 1 sec resolution and a generalized track with a reduced set of the most significant positions of the master track. A detailed report on processing is also available for each flight.
    Type: Dataset
    Format: application/zip, 13 datasets
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    DATA PANGAEA
  • 7
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    Master tracks in different resolutions from POLAR 5 flight P5_236_RIISERBATHY_22_23_2301081001 (2023)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Keywords: AC; Aircraft; Calculated; Course; DATE/TIME; LATITUDE; LONGITUDE; P5_236_RIISERBATHY_22_23; P5_236_RIISERBATHY_22_23_2301081001; POLAR 5; RIISERBATHY; Speed
    Type: Dataset
    Format: text/tab-separated-values, 752 data points
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    DATA PANGAEA
  • 8
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    Master tracks in different resolutions from POLAR 5 flight P5_236_RIISERBATHY_22_23_2301091101 (2023)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Keywords: AC; Aircraft; Calculated; Course; DATE/TIME; LATITUDE; LONGITUDE; P5_236_RIISERBATHY_22_23; P5_236_RIISERBATHY_22_23_2301091101; POLAR 5; RIISERBATHY; Speed
    Type: Dataset
    Format: text/tab-separated-values, 760 data points
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    DATA PANGAEA
  • 9
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    Master tracks in different resolutions from POLAR 5 flight P5_236_RIISERBATHY_22_23_2212230301 (test flight) (2023)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Keywords: AC; Aircraft; Calculated; Course; DATE/TIME; LATITUDE; LONGITUDE; P5_236_RIISERBATHY_22_23; P5_236_RIISERBATHY_22_23_2212230301; POLAR 5; RIISERBATHY; Speed
    Type: Dataset
    Format: text/tab-separated-values, 188 data points
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    DATA PANGAEA
  • 10
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    Master tracks in different resolutions from POLAR 5 flight P5_236_RIISERBATHY_22_23_2301010501 (2023)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Keywords: AC; Aircraft; Calculated; Course; DATE/TIME; LATITUDE; LONGITUDE; P5_236_RIISERBATHY_22_23; P5_236_RIISERBATHY_22_23_2301010501; POLAR 5; RIISERBATHY; Speed
    Type: Dataset
    Format: text/tab-separated-values, 764 data points
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    DATA PANGAEA
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