Age-depth profile from a 2.5D model of the Beyond EPICA ice core drill site at Little Dome C, Antarctica

DOI

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).

Identifier
DOI https://doi.pangaea.de/10.1594/PANGAEA.984413
Related Identifier References https://doi.org/10.5194/egusphere-2024-1650
Related Identifier References https://doi.org/10.1594/PANGAEA.957176
Related Identifier References https://doi.org/10.5194/tc-17-3461-2023
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.984413
Provenance
Creator Chung, Ailsa (ORCID: 0000-0003-3822-845X); Parrenin, Frédéric ORCID logo; Mulvaney, Rob; Vittuari, Luca; Frezzotti, Massimo ORCID logo; Zanutta, Antonio; Cavitte, Marie G P ORCID logo; Lilien, David A ORCID logo; Eisen, Olaf (ORCID: 0000-0002-6380-962X)
Publisher PANGAEA
Publication Year 2025
Funding Reference Horizon 2020 https://doi.org/10.13039/501100007601 Crossref Funder ID 730258 doi:10.3030/730258 Beyond EPICA - Oldest Ice; Horizon 2020 https://doi.org/10.13039/501100007601 Crossref Funder ID 955750 doi:10.3030/955750 Research and training network on understanding Deep icE corE Proxies to Infer past antarctiC climatE dynamics (DEEPICE)
Rights Creative Commons Attribution 4.0 International; Data access is restricted (moratorium, sensitive data, license constraints); https://creativecommons.org/licenses/by/4.0/
OpenAccess false
Representation
Resource Type Dataset
Format text/tab-separated-values
Size 12430 data points
Discipline Earth System Research
Spatial Coverage (122.445 LON, -75.299 LAT)