Eight glacial cycles from an Antarctic ice core
Laurent Augustin,Carlo Barbante,Piers R. F. Barnes,J. M. Barnola,Matthias Bigler,Emiliano Castellano,Olivier Cattani,Jérôme Chappellaz,Dorthe Dahl-Jensen,Barbara Delmonte,Gabrielle Dreyfus,Gaël Durand,S. Falourd,Hubertus Fischer,Jacqueline Flückiger,Margareta Hansson,Philippe Huybrechts,Gérard Jugie,Sigfus J Johnsen,Jean Jouzel,Patrik R Kaufmann,Josef Kipfstuhl,Fabrice Lambert,Vladimir Ya. Lipenkov,Geneviève C Littot,Antonio Longinelli,Reginald Lorrain,Valter Maggi,Valérie Masson-Delmotte,Heinz Miller,Robert Mulvaney,Johannes Oerlemans,Hans Oerter,Giuseppe Orombelli,Frédéric Parrenin,David A. Peel,J. R. Petit,Dominique Raynaud,Catherine Ritz,Urs Ruth,Jakob Schwander,Urs Siegenthaler,Roland Souchez,Bernhard Stauffer,Jørgen Peder Steffensen,Barbara Stenni,Thomas F. Stocker,Ignazio Tabacco,Roberto Udisti,Roderik S. W. van de Wal,Michiel R. van den Broeke,Jérôme Weiss,Frank Wilhelms,Jan-Gunnar Winther,Eric W. Wolff,Mario Zucchelli +55 more
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The recovery of a deep ice core from Dome C, Antarctica, that provides a climate record for the past 740,000 years is reported, suggesting that without human intervention, a climate similar to the present one would extend well into the future.Abstract:
The Antarctic Vostok ice core provided compelling evidence of the nature of climate, and of climate feedbacks, over the past 420,000 years. Marine records suggest that the amplitude of climate variability was smaller before that time, but such records are often poorly resolved. Moreover, it is not possible to infer the abundance of greenhouse gases in the atmosphere from marine records. Here we report the recovery of a deep ice core from Dome C, Antarctica, that provides a climate record for the past 740,000 years. For the four most recent glacial cycles, the data agree well with the record from Vostok. The earlier period, between 740,000 and 430,000 years ago, was characterized by less pronounced warmth in interglacial periods in Antarctica, but a higher proportion of each cycle was spent in the warm mode. The transition from glacial to interglacial conditions about 430,000 years ago ( Termination V) resembles the transition into the present interglacial period in terms of the magnitude of change in temperatures and greenhouse gases, but there are significant differences in the patterns of change. The interglacial stage following Termination V was exceptionally long - 28,000 years compared to, for example, the 12,000 years recorded so far in the present interglacial period. Given the similarities between this earlier warm period and today, our results may imply that without human intervention, a climate similar to the present one would extend well into the future.read more
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A Pliocene-Pleistocene stack of 57 globally distributed benthic δ18O records
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High-resolution carbon dioxide concentration record 650,000–800,000 years before present
Dieter Lüthi,Martine Le Floch,Bernhard Bereiter,Thomas Blunier,Jean-Marc Barnola,Urs Siegenthaler,Dominique Raynaud,Jean Jouzel,Hubertus Fischer,Kenji Kawamura,Thomas F. Stocker +10 more
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Orbital and Millennial Antarctic Climate Variability over the Past 800,000 Years
Jean Jouzel,Valérie Masson-Delmotte,O. Cattani,Gabrielle Dreyfus,S. Falourd,G. P. Hoffmann,Bénédicte Minster,Julius Nouet,Jean-Marc Barnola,Jérôme Chappellaz,Hubertus Fischer,J. C. Gallet,Sigfus J Johnsen,Sigfus J Johnsen,Markus Leuenberger,L. Loulergue,D. Luethi,Hans Oerter,Frédéric Parrenin,Grant M. Raisbeck,Dominique Raynaud,Adrian Schilt,Jakob Schwander,Enricomaria Selmo,Roland Souchez,Renato Spahni,Bernhard Stauffer,Jørgen Peder Steffensen,Barbara Stenni,Thomas F. Stocker,Jean-Louis Tison,Martin Werner,Eric W. Wolff +32 more
TL;DR: It is suggested that the interplay between obliquity and precession accounts for the variable intensity of interglacial periods in ice core records.
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