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

V. Masson-Delmotte...[et al.]; B. Stenni; Thomas Blunier; O. Cattani; Sigfus Johann Johnsen

doi:10.1073/pnas.0914536107

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

V. Masson-Delmotte...[et al.], B. Stenni, Thomas Blunier, O. Cattani, Sigfus Johann Johnsen

51 Citations (Scopus)

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 CO₂ 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.

Original language	English
Journal	Proceedings of the National Academy of Science of the United States of America
Volume	107
Issue number	27
Pages (from-to)	12091-12094
Number of pages	4
ISSN	0027-8424
DOIs	https://doi.org/10.1073/pnas.0914536107
Publication status	Published - 6 Jul 2010

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title = "Abrupt change of Antarctic moisture origin at the end of Termination II",

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 CO2 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.",

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T1 - Abrupt change of Antarctic moisture origin at the end of Termination II

AU - Masson-Delmotte...[et al.], V.

AU - Stenni, B.

AU - Blunier, Thomas

AU - Cattani, O.

AU - Johnsen, Sigfus Johann

PY - 2010/7/6

Y1 - 2010/7/6

N2 - 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 CO2 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.

AB - 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 CO2 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.

U2 - 10.1073/pnas.0914536107

DO - 10.1073/pnas.0914536107

M3 - Journal article

C2 - 20566887

SN - 0027-8424

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JO - Proceedings of the National Academy of Sciences of the United States of America

JF - Proceedings of the National Academy of Sciences of the United States of America

IS - 27

ER -

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

Abstract

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