Chung, Ailsa; Parrenin, Frédéric; Steinhage, Daniel; Mulvaney, Rob; Martín, Carlos; Cavitte, Marie G P; Lilien, David A; Helm, Veit; Taylor, Drew; Gogineni, Prasad; Ritz, Catherine; Frezzotti, Massimo; O'Neill, Charles; Miller, Heinrich; Dahl-Jensen, Dorthe; Eisen, Olaf (2023): Basal unit at Little Dome C, Antarctica [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.957173, In: Chung, A et al. (2023): Internal reflecting horizons at Little Dome C, Antarctica [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.957176
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Abstract:
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.
Supplement to:
Chung, Ailsa; Parrenin, Frédéric; Steinhage, Daniel; Mulvaney, Robert; Martín, Carlos; Cavitte, Marie G P; Lilien, David A; Helm, Veit; Taylor, Drew; Gogineni, Prasad; Ritz, Catherine; Frezzotti, Massimo; O'Neill, Charles; Miller, Heinrich; Dahl-Jensen, Dorthe; Eisen, Olaf (2023): Stagnant ice and age modelling in the Dome C region, Antarctica. The Cryosphere, 17(8), 3461-3483, https://doi.org/10.5194/tc-17-3461-2023
References:
Lilien, David A; Steinhage, Daniel; Taylor, Drew; Parrenin, Frédéric; Ritz, Catherine; Mulvaney, Robert; Martín, Carlos; Yan, Jie-Bang; O'Neill, Charles; Frezzotti, Massimo; Miller, Heinrich; Gogineni, Prasad; Dahl-Jensen, Dorthe; Eisen, Olaf (2021): Brief communication: New radar constraints support presence of ice older than 1.5 Myr at Little Dome C. The Cryosphere, 15(4), 1881-1888, https://doi.org/10.5194/tc-15-1881-2021
Project(s):
Beyond EPICA - Oldest Ice (BE-OI)
Funding:
Horizon 2020 (H2020), grant/award no. 955750: Research and training network on understanding Deep icE corE Proxies to Infer past antarctiC climatE dynamics (DEEPICE)
Coverage:
Median Latitude: -75.317606 * Median Longitude: 122.505172 * South-bound Latitude: -75.348373 * West-bound Longitude: 122.384247 * North-bound Latitude: -75.285507 * East-bound Longitude: 122.620865
Date/Time Start: 2019-11-30T08:28:21 * Date/Time End: 2019-12-04T07:53:33
Event(s):
LDC-VHF_20201001 (20201001) * Latitude Start: -75.309212 * Longitude Start: 122.538071 * Latitude End: -75.297562 * Longitude End: 122.446075 * Date/Time Start: 2019-11-30T08:28:21 * Date/Time End: 2019-11-30T10:41:14 * Location: Dome C, Antarctica * Campaign: ANT-Land_2019_BE-OI * Basis: AWI Antarctic Land Expedition * Method/Device: Little Dome C - Very High Frequency multichannel coherent radar depth sounder (LDC-VHF)
LDC-VHF_20201003 (20201003) * Latitude Start: -75.308189 * Longitude Start: 122.548164 * Latitude End: -75.307961 * Longitude End: 122.384354 * Date/Time Start: 2019-12-01T07:03:21 * Date/Time End: 2019-12-01T07:35:26 * Location: Dome C, Antarctica * Campaign: ANT-Land_2019_BE-OI * Basis: AWI Antarctic Land Expedition * Method/Device: Little Dome C - Very High Frequency multichannel coherent radar depth sounder (LDC-VHF)
LDC-VHF_20201004 (20201004) * Latitude Start: -75.308372 * Longitude Start: 122.384163 * Latitude End: -75.298981 * Longitude End: 122.446266 * Date/Time Start: 2019-12-01T07:39:33 * Date/Time End: 2019-12-01T08:23:09 * Location: Dome C, Antarctica * Campaign: ANT-Land_2019_BE-OI * Basis: AWI Antarctic Land Expedition * Method/Device: Little Dome C - Very High Frequency multichannel coherent radar depth sounder (LDC-VHF)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Chung, Ailsa | |||
| 2 | Line | Line | Chung, Ailsa | name of radar transect | ||
| 3 | LONGITUDE | Longitude | Chung, Ailsa | Geocode – EPSG: 4326 | ||
| 4 | LATITUDE | Latitude | Chung, Ailsa | Geocode – EPSG: 4326 | ||
| 5 | Distance | Distance | km | Chung, Ailsa | ||
| 6 | Depth of basal unit, below ice surface | Depth basal unit | m | Chung, Ailsa | Calculated | conversion from TWT using c = 0.1685 m/μs and firn correction of 10 m |
| 7 | Two-way traveltime | TWT | ns | Chung, Ailsa | Little Dome C - Very High Frequency multichannel coherent radar depth sounder (LDC-VHF) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
160688 data points
Download Data
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