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| Titel |
A comparison of the present and last interglacial periods in six Antarctic ice cores |
| VerfasserIn |
V. Masson-Delmotte, D. Buiron, A. Ekaykin, M. Frezzotti, H. Gallée, J. Jouzel, G. Krinner, A. Landais, H. Motoyama, H. Oerter, K. Pol, D. Pollard, C. Ritz, E. Schlosser, L. C. Sime, H. Sodemann, B. Stenni, R. Uemura, F. Vimeux |
| 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. 2 ; Nr. 7, no. 2 (2011-04-28), S.397-423 |
| Datensatznummer |
250004507
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| Publikation (Nr.) |
 copernicus.org/cp-7-397-2011.pdf |
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| Zusammenfassung |
| We compare the present and last interglacial periods as recorded in
Antarctic water stable isotope records now available at various temporal
resolutions from six East Antarctic ice cores: Vostok, Taylor Dome, EPICA
Dome C (EDC), EPICA Dronning Maud Land (EDML), Dome Fuji and the recent
TALDICE ice core from Talos Dome. We first review the different modern site
characteristics in terms of ice flow, meteorological conditions,
precipitation intermittency and moisture origin, as depicted by
meteorological data, atmospheric reanalyses and Lagrangian moisture source
diagnostics. These different factors can indeed alter the relationships
between temperature and water stable isotopes. Using five records with
sufficient resolution on the EDC3 age scale, common features are quantified
through principal component analyses. Consistent with instrumental records
and atmospheric model results, the ice core data depict rather coherent and
homogenous patterns in East Antarctica during the last two interglacials.
Across the East Antarctic plateau, regional differences, with respect to the
common East Antarctic signal, appear to have similar patterns during the
current and last interglacials. We identify two abrupt shifts in isotopic
records during the glacial inception at TALDICE and EDML, likely caused by
regional sea ice expansion. These regional differences are discussed in
terms of moisture origin and in terms of past changes in local elevation
histories, which are compared to ice sheet model results. Our results suggest
that elevation changes may contribute significantly to inter-site
differences. These elevation changes may be underestimated by current ice
sheet models. |
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