Published in

National Academy of Sciences, Proceedings of the National Academy of Sciences, 27(107), p. 12091-12094, 2010

DOI: 10.1073/pnas.0914536107

Links

Tools

Export citation

Search in Google Scholar

Abrupt change of Antarctic moisture origin at the end of Termination II

Journal article published in 2010 by V. Masson-Delmotte ORCID, B. Stenni, T. Blunier ORCID, O. Cattani, J. Chappellaz, H. Cheng ORCID, G. Dreyfus, R. L. Edwards, S. Falourd, A. Govin, K. Kawamura, S. J. Johnsen, J. Jouzel, A. Landais, B. Lemieux-Dudon and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

Full text: Download

Red circle
Preprint: archiving forbidden
Green circle
Postprint: archiving allowed
Upload
Red circle
Published version: archiving forbidden
Policy details
Data provided by SHERPA/RoMEO

Abstract

The deuterium excess of polar ice cores documents past changes in evaporation conditions and moisture origin. New data obtained from the European Project for Ice Coring in Antarctica Dome C East Antarctic ice core provide new insights on the sequence of events involved in Termination II, the transition between the penultimate glacial and interglacial periods. This termination is marked by a north–south seesaw behavior, with first a slow methane concentration rise associated with a strong Antarctic temperature warming and a slow deuterium excess rise. This first step is followed by an abrupt north Atlantic warming, an abrupt resumption of the East Asian summer monsoon, a sharp methane rise, and a CO 2 overshoot, which coincide within dating uncertainties with the end of Antarctic optimum. Here, we show that this second phase is marked by a very sharp Dome C centennial deuterium excess rise, revealing abrupt reorganization of atmospheric circulation in the southern Indian Ocean sector.