Chung, Ailsa; Parrenin, Frédéric; Mulvaney, Rob; Vittuari, Luca; Frezzotti, Massimo; Zanutta, Antonio; Cavitte, Marie G P; Lilien, David A; Eisen, Olaf (2025): Age-depth profile from a 2.5D model of the Beyond EPICA ice core drill site at Little Dome C, Antarctica [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.984413
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Published: 2025-09-29 • DOI registered: 2025-09-30
Abstract:
We used a 2.5D inverse model constrained by radar horizons to find the age-depth profile at the European Beyond EPICA - Oldest Ice project drill site (BELDC; 75.29917 °S, 122.44516 °E) at Little Dome C (LDC), Antarctica. Further details on the model can be found in the associated publication: Chung et al. (2024; doi:10.5194/egusphere-2024-1650). The model constraints were derived from the LDC-VHF radar dataset (Chung et al. 2023; doi:10.5194/tc-17-3461-2023). The radar survey was conducted during the 2019-20 Antarctic field season in a collaboration between the University of Alabama (UA), the University of Copenhagen (CPH) and the Alfred Wegener Institute (AWI), using the Little Dome C-Very High Frequency radar system (LDC-VHF; Chung et al., 2023; doi:10.5194/tc-17-3461-2023).
The 2.5D model was applied to a flow line from Dome C to BELDC by Chung et al. (2024; doi:10.5194/egusphere-2024-1650). Here we present the resulting modelled age-depth profile at BELDC. We put the "maximum age" where the age density becomes > 20 ka/m - the threshold for which a paleoclimatic signal can reasonably be extracted. This occurs at 2452 m depth with an age of 1.12 Ma. However, we have chosen to include the entire modelled profile down to the "accreted ice" depth of 2485 m, in case that < 20 ka/m requirement proves to be too stringent. The depth of accreted ice is the deepest point where the model provides physically interpretable results (see Chung et al., 2024 for details).
Supplement to:
Chung, Ailsa; Parrenin, Frédéric; Mulvaney, Robert; Vittuari, Luca; Frezzotti, Massimo; Zanutta, Antonio; Lilien, David A; Cavitte, Marie G P; Eisen, Olaf (2025): Age, thinning and spatial origin of the Beyond EPICA ice from a 2.5D ice flow model. The Cryosphere, 19(10), 4125-4140, https://doi.org/10.5194/tc-19-4125-2025
References:
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): Internal reflecting horizons at Little Dome C, Antarctica [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.957176
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
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:
Latitude: -75.299170 * Longitude: 122.445160
Minimum DEPTH, ice/snow: 0 m * Maximum DEPTH, ice/snow: 2485 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, ice/snow | Depth ice/snow | m | Chung, Ailsa | Geocode | |
| 2 | Ice age | Ice age | ka BP | Chung, Ailsa | 2.5D age-depth model according to Chung et al. (2024) | Modelled age |
| 3 | Age density | Age density | a/m | Chung, Ailsa | 2.5D age-depth model according to Chung et al. (2024) | |
| 4 | Accumulation rate in ice equivalent per year | Acc rate ice per year | m/a | Chung, Ailsa | 2.5D age-depth model according to Chung et al. (2024) | |
| 5 | Thinning function | TF | Chung, Ailsa | 2.5D age-depth model according to Chung et al. (2024) | ||
| 6 | Distance | Distance | km | Chung, Ailsa | From current position along the flow line where ice particles were originally deposited on the surface |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
12430 data points
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