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  • Antarctica; AWI_Glac; Glaciology @ AWI  (2)
  • 300 m snow streamer with 96 gimballed 30 Hz vertical compressional wave (P-wave) sensors; ANT-Land_2016/17_FISP; AWI Antarctic Land Expedition; Binary Object; Binary Object (File Size); Event label; Filchner Ice Shelf Project; File content; FISP; FISP_2016-2017_20170501; FISP_2016-2017_20170502; FISP_2016-2017_20170503; FISP_2016-2017_20170504; FISP_2016-2017_20170506; Ice-shelf Channels; profile I; profile II; profile III; profile IV; profile V; Snow streamer; SSTREAM  (1)
Document type
Keywords
Publisher
Years
  • 1
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    Unknown
    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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    Seismic reflection data of a basal channel and ocean cavity at the ice shelf-grounding line area of Support Force Glacier, Filchner Ice Shelf, Antarctica (2021)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Description: Support Force Glacier (SFG) is a large ice stream feeding into the Filchner Ice Shelf. The active seismic survey is recorded at the sheet-shelf transition of SFG. We map the bed while grounded, the ocean cavity around a surface channel at the ice shelf and its counterpart at the base, the basal channel, and the seabed. The survey consists of 5 seismic reflection profiles, 2 along-flow profiles and 3 across-flow profiles. The 2.42GB seismic data were recorded with a 300 m long streamer consisting of 96 30Hz p-wave sensors. The sample rate is 0.5 ms, record length 3000 ms. The data is single fold, shot spacing is 150 m: line name: profile TC paper: direction: #shots: - 20170501 profile I along-flow 291 shots - 20170502 profile III across-flow 28 shots - 20170503 profile II along-flow 71 shots - 20170504 profile IV across-flow 40 shots - 20170506 profile V across-flow 50 shots Presented are for each line (20170501 used as example): - The raw shots: 20170501_RAW_SHOTS_EDITS_GEOM.segy - The Kirchhoff migrated and depth converted profiles: 20170501stat_TXmig_Zconv.segy - The shot x,y,z coordinates in longitude, latitude and surface height in meters above sea level (z, WGS84 ellipsoid): 20170501_GPS.txt
    Keywords: 300 m snow streamer with 96 gimballed 30 Hz vertical compressional wave (P-wave) sensors; ANT-Land_2016/17_FISP; AWI Antarctic Land Expedition; Binary Object; Binary Object (File Size); Event label; Filchner Ice Shelf Project; File content; FISP; FISP_2016-2017_20170501; FISP_2016-2017_20170502; FISP_2016-2017_20170503; FISP_2016-2017_20170504; FISP_2016-2017_20170506; Ice-shelf Channels; profile I; profile II; profile III; profile IV; profile V; Snow streamer; SSTREAM
    Type: Dataset
    Format: text/tab-separated-values, 54 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
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