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| Titel |
A refined TALDICE-1a age scale from 55 to 112 ka before present for the Talos Dome ice core based on high-resolution methane measurements |
| VerfasserIn |
S. Schüpbach, U. Federer, M. Bigler, H. Fischer, T. F. Stocker |
| 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 ; 7, no. 3 ; Nr. 7, no. 3 (2011-09-26), S.1001-1009 |
| Datensatznummer |
250004625
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| Publikation (Nr.) |
 copernicus.org/cp-7-1001-2011.pdf |
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| Zusammenfassung |
| A precise synchronization of different climate records is indispensable for
a correct dynamical interpretation of paleoclimatic data. A chronology for
the TALDICE ice core from the Ross Sea sector of East Antarctica has
recently been presented based on methane synchronization with Greenland and
the EDC ice cores and δ18Oice synchronization with EDC in
the bottom part (TALDICE-1). Using new high-resolution methane data obtained with a continuous flow analysis technique, we present a refined age
scale for the age interval from 55–112 thousand years (ka) before
present, where TALDICE is synchronized with EDC. New and more precise tie
points reduce the uncertainties of the age scale from up to 1900 yr in
TALDICE-1 to below 1100 yr over most of the refined interval and shift
the Talos Dome dating to significantly younger ages during the onset of
Marine Isotope Stage 3. Thus, discussions of climate dynamics at
sub-millennial time scales are now possible back to 110 ka, in particular
during the inception of the last ice age. Calcium data of EDC and TALDICE
are compared to show the impact of the refinement to the synchronization of
the two ice cores not only for the gas but also for the ice age scale. |
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