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| Main Authors: | , , , , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2025
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| Online Access: | https://doi.org/10.1594/PANGAEA.984413 |
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| _version_ | 1867169169296850944 |
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| author | Chung, Ailsa Parrenin, Frédéric Mulvaney, Rob Vittuari, Luca Frezzotti, Massimo Zanutta, Antonio Cavitte, Marie G P Lilien, David A Eisen, Olaf |
| author_facet | Chung, Ailsa Parrenin, Frédéric Mulvaney, Rob Vittuari, Luca Frezzotti, Massimo Zanutta, Antonio Cavitte, Marie G P Lilien, David A Eisen, Olaf |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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). |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_984413 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Age-depth profile from a 2.5D model of the Beyond EPICA ice core drill site at Little Dome C, Antarctica Chung, Ailsa Parrenin, Frédéric Mulvaney, Rob Vittuari, Luca Frezzotti, Massimo Zanutta, Antonio Cavitte, Marie G P Lilien, David A Eisen, Olaf 2.5D age-depth model according to Chung et al. (2024); Accumulation rate in ice equivalent per year; Age density; age-depth model; Antarctica; BELDC_site; BE-OI; Beyond EPICA; Beyond EPICA drill site; Beyond EPICA - Oldest Ice; DEPTH, ice/snow; Distance; Ice age; Ice core; Little Dome C; MULT; Multiple investigations; Thinning function 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). |
| title | Age-depth profile from a 2.5D model of the Beyond EPICA ice core drill site at Little Dome C, Antarctica |
| topic | 2.5D age-depth model according to Chung et al. (2024); Accumulation rate in ice equivalent per year; Age density; age-depth model; Antarctica; BELDC_site; BE-OI; Beyond EPICA; Beyond EPICA drill site; Beyond EPICA - Oldest Ice; DEPTH, ice/snow; Distance; Ice age; Ice core; Little Dome C; MULT; Multiple investigations; Thinning function |
| url | https://doi.org/10.1594/PANGAEA.984413 |