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  • Antarctica; AWI_Glac; Glaciology @ AWI  (2)
  • 20201001; 20201003; 20201004; 20201005; 20201006; 20201007; 20201008; 20201009; 20201010; 20201011; 20201012; Antarctica; ANT-Land_2019_BE-OI; AWI Antarctic Land Expedition; BE-OI; Beyond EPICA - Oldest Ice; Calculated; Depth of internal reflection horizon, below ice surface; Distance; Dome C; Dome C, Antarctica; Event label; Internal Reflection Horizon; LATITUDE; LDC-VHF; LDC-VHF_20201001; LDC-VHF_20201003; LDC-VHF_20201004; LDC-VHF_20201005; LDC-VHF_20201006; LDC-VHF_20201007; LDC-VHF_20201008; LDC-VHF_20201009; LDC-VHF_20201010; LDC-VHF_20201011; LDC-VHF_20201012; Line; Little Dome C - Very High Frequency multichannel coherent radar depth sounder; LONGITUDE; radio echo sounding; Two-way traveltime  (1)
Document type
Keywords
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  • 1
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    Depth-averaged pure ice attenuation rates (two-way) from PISM model ensemble for Antarctica - link to NetCDF file (2018)
    PANGAEA
    Details
    Publication Date: 2023-03-16
    Keywords: Antarctica; AWI_Glac; Glaciology @ AWI
    Type: Dataset
    Format: application/x-netcdf, 12.8 MBytes
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Ice thickness from radio-echo sounding (RES) and radar attenuation from numerical modelling for Recovery Glacier, Antarctica (2018)
    PANGAEA
    In:  Supplement to: Humbert, Angelika; Steinhage, Daniel; Helm, Veit; Beyer, Sebastian; Kleiner, Thomas (2018): Missing Evidence of Widespread Subglacial Lakes at Recovery Glacier, Antarctica. Journal of Geophysical Research-Earth Surface, 123(11), 2802-2826, https://doi.org/10.1029/2017JF004591
    Details
    Publication Date: 2023-03-16
    Description: Recovery Glacier reaches far into the East Antarctic Ice Sheet. Recent projections point out that its dynamic behaviour has a considerable impact on future Antarctic ice loss (Golledge et al. 2017). Subglacial lakes are thought to play a major role in the initiation of the rapid ice flow (Bell et al. 2007). Satellite altimetry observations have even suggested several actively filling and draining subglacial lakes beneath the main trunk (Smith et al. 2009). We present new data of the geometry of this glacier and investigate its basal properties employing radio-echo sounding. Using ice-sheet modelling, we were able to constrain estimates of radar absorption in the ice, but uncertainties remain large. The magnitude of the basal reflection coefficient is thus still poorly known. However, its spatial variability, in conjunction with additional indicators, can be used to infer the presence of subglacial water. We find no clear evidence of water at most of the previously proposed lake sites. Especially locations where altimetry detected active lakes, do not exhibit lake characteristics in RES. We argue that lakes far upstream the main trunk are not triggering enhanced ice flow, which is also supported by modeled subglacial hydrology.
    Keywords: Antarctica; AWI_Glac; Glaciology @ AWI
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Internal reflecting horizon 2 at Little Dome C, Antarctica (2023)
    PANGAEA
    Details
    Publication Date: 2023-12-20
    Description: This dataset of radio-echo sounding internal reflecting horizons (IRH) which were traced across the radar surveys conducted in the 2019/20 Antarctic summer season at Little Come C, in the Dome C region of the East Antarctic Plateau. The data set is associated to publication: Chung, A., et al. (2023). The data were collected during a radar survey conducted in the Antarctic field seasons of 2019-20 using the Little Dome C - Very High Frequency (LDC-VHF) multichannel coherent radar depth sounder developed through a collaboration of The University of Alabama (UA), the University of Copenhagen (CPH) and the Alfred Wegener Institute (AWI). The survey covered Patches A and B of Little Dome C (Lilien et al., 2021), in order to select the exact drill site for the Beyond EPICA Oldest Ice drilling project. The datasets consists of 12 transects systematically covering Patches A and B with parallel lines, over an area of approximately 5×8 km^2. The dataset contains 19 IRHs, the basal unit horizon and the ice-bed interface which were manually traced by Ailsa Chung, using the seismic environment of the Echos software from Paradigm Geophysical. A single file for each IRH is provided in a text file, tab separated format with both depth and two-way travel time. The conversion to depth done using c = 0.1685 m/μs and firn correction of 10 m. The IRHs are provided at approximately 3.5 m spacial resolution.
    Keywords: 20201001; 20201003; 20201004; 20201005; 20201006; 20201007; 20201008; 20201009; 20201010; 20201011; 20201012; Antarctica; ANT-Land_2019_BE-OI; AWI Antarctic Land Expedition; BE-OI; Beyond EPICA - Oldest Ice; Calculated; Depth of internal reflection horizon, below ice surface; Distance; Dome C; Dome C, Antarctica; Event label; Internal Reflection Horizon; LATITUDE; LDC-VHF; LDC-VHF_20201001; LDC-VHF_20201003; LDC-VHF_20201004; LDC-VHF_20201005; LDC-VHF_20201006; LDC-VHF_20201007; LDC-VHF_20201008; LDC-VHF_20201009; LDC-VHF_20201010; LDC-VHF_20201011; LDC-VHF_20201012; Line; Little Dome C - Very High Frequency multichannel coherent radar depth sounder; LONGITUDE; radio echo sounding; Two-way traveltime
    Type: Dataset
    Format: text/tab-separated-values, 206604 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
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