EPICA Dome C Ice Core Timescales EDC3
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2007
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| _version_ | 1867170869278670848 |
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| author | Parrenin, Frédéric Loulergue, Laetitia Wolff, Eric William |
| author_facet | Parrenin, Frédéric Loulergue, Laetitia Wolff, Eric William |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The EPICA (European Project for Ice Coring in Antarctica) Dome C drilling in East Antarctica has now been completed to a depth of 3260 m, at only a few meters above bedrock. Here we present the new EDC3 chronology, which is based on the use of 1) a snow accumulation and mechanical flow model, and 2) a set of independent age markers along the core. These are obtained by pattern matching of recorded parameters to either absolutely dated paleoclimatic records, or to insolation variations. We show that this new time scale is in excellent agreement with the Dome Fuji and Vostok ice core time scales back to 100 kyr within 1 kyr. Discrepancies larger than 3 kyr arise during MIS 5.4, 5.5 and 6, which points to anomalies in either snow accumulation or mechanical flow during these time periods. We estimate that EDC3 gives accurate event durations within 20% (2 sigma) back to MIS11 and accurate absolute ages with a maximum uncertainty of 6 kyr back to 800 kyr. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_671367 |
| institution | PANGAEA |
| language | en |
| publishDate | 2007 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | EPICA Dome C Ice Core Timescales EDC3 Parrenin, Frédéric Loulergue, Laetitia Wolff, Eric William Age model; Age model, ice flow model; DEPTH, ice/snow; Dome_C; Dome C, Antarctica; EDC; EPICA; EPICA Dome C; European Project for Ice Coring in Antarctica; Gas age; ICEDRILL; Ice drill; Sample ID The EPICA (European Project for Ice Coring in Antarctica) Dome C drilling in East Antarctica has now been completed to a depth of 3260 m, at only a few meters above bedrock. Here we present the new EDC3 chronology, which is based on the use of 1) a snow accumulation and mechanical flow model, and 2) a set of independent age markers along the core. These are obtained by pattern matching of recorded parameters to either absolutely dated paleoclimatic records, or to insolation variations. We show that this new time scale is in excellent agreement with the Dome Fuji and Vostok ice core time scales back to 100 kyr within 1 kyr. Discrepancies larger than 3 kyr arise during MIS 5.4, 5.5 and 6, which points to anomalies in either snow accumulation or mechanical flow during these time periods. We estimate that EDC3 gives accurate event durations within 20% (2 sigma) back to MIS11 and accurate absolute ages with a maximum uncertainty of 6 kyr back to 800 kyr. |
| title | EPICA Dome C Ice Core Timescales EDC3 |
| topic | Age model; Age model, ice flow model; DEPTH, ice/snow; Dome_C; Dome C, Antarctica; EDC; EPICA; EPICA Dome C; European Project for Ice Coring in Antarctica; Gas age; ICEDRILL; Ice drill; Sample ID |
| url | https://doi.org/10.1594/PANGAEA.671367 |