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| Titel |
Volcanic synchronisation between the EPICA Dome C and Vostok ice cores (Antarctica) 0-145 kyr BP |
| VerfasserIn |
F. Parrenin, J.-R. Petit, V. Masson-Delmotte, E. Wolff, I. Basile-Doelsch, J. Jouzel, V. Lipenkov, S. O. Rasmussen, J. Schwander, M. Severi, R. Udisti, D. Veres, B. M. Vinther |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 8, no. 3 ; Nr. 8, no. 3 (2012-06-08), S.1031-1045 |
| Datensatznummer |
250005593
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| Publikation (Nr.) |
 copernicus.org/cp-8-1031-2012.pdf |
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| Zusammenfassung |
| This study aims at refining the synchronisation between the EPICA Dome C
(EDC) and Vostok ice cores in the time interval 0–145 kyr BP by using the
volcanic signatures. 102 common volcanic events were identified by using
continuous electrical conductivity (ECM), di-electrical profiling (DEP) and
sulfate measurements while trying to minimize the distortion of the
glaciological chronologies. This is an update and a continuation of previous
works performed over the 0–45 kyr interval that provided 56 tie points to
the ice core chronologies (Udisti et al., 2004). This synchronisation will
serve to establish Antarctic Ice Core Chronology 2012, the next synchronised
Antarctic dating. A change of slope in the EDC-depth/Vostok-depth diagram is
probably related to a change of accumulation regime as well as to a change
of ice thickness upstream of the Lake Vostok, but we did not invoke any
significant temporal change of surface accumulation at EDC relative to
Vostok. No significant phase difference is detected between the EDC and
Vostok isotopic records, but depth shifts between the Vostok 3G and 5G ice
cores prevent from looking at this problem accurately. Three possible
candidates for the Toba volcanic super-eruption ~73 kyr ago are
suggested in the Vostok and EDC volcanic records. Neither the ECM, DEP nor
the sulfate fingerprints for these 3 events are significantly larger than
many others in the records. |
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