One-to-one coupling of glacial climate variability in Greenland and Antarctica - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue Nature Année : 2006

One-to-one coupling of glacial climate variability in Greenland and Antarctica

C. Barbante (1, 2, 3) , Jean-Marc Barnola (3, 4) , Silvia Becagli (3, 5) , J. Beer (3, 6) , M. Bigler (3, 7) , Claude F. Boutron (3, 4) , T. Blunier (3, 7) , E. Castellano (3, 5) , O. Cattani (8, 9) , Jérome Chappellaz (3, 4) , D. Dahl-Jensen (3) , Maxime Debret (4) , Barbara Delmonte (10) , D. Dick , S. Falourd (8, 9) , S. Faria (3) , U. Federer (3) , Hubertus Fischer (11) , J. Freitag (11) , A. Frenzel (11) , D. Fritzsche (11) , F. Fundel (11) , Paolo Gabrielli (1, 4) , V. Gaspari (10) , R. Gersonde (11) , W. Graf (12) , D. Grigoriev (13) , I. Hamann (11) , M. Hansson (14) , G. Hoffmann (8, 9) , M. A. Hutterli (7, 15) , P. Huybrechts (11, 16) , E. Isaksson (17) , S. Johnsen (7) , Jean Jouzel (8, 9) , M. Kaczmarska (17) , T. Karlin (14) , P. Kaufmann (7) , S. Kipfstuhl (11) , M. Kohno (11) , F. Lambert (7) , Anja Lambrecht (11) , Astrid Lambrecht (11) , A. Landais (8, 9) , G. Lawer (11) , M. Leuenberger (7) , G. Littot (15) , L. Loulergue (4) , D. Lüthi (7) , V. Maggi (10) , F. Marino (10) , Valérie Masson-Delmotte (8, 9) , H. Meyer (11) , H. Miller (11) , R. Mulvaney (15) , B. Narcisi (18) , J. Oerlemans (19) , H. Oerter (11) , F. Parrenin (4) , Jean-Robert Petit (4) , G. Raisbeck (20) , D. Raynaud (4) , R. Röthlisberger (15) , U. Ruth (11) , O. Rybak (11) , M. Severi (5) , J. Schmitt (11) , J. Schwander (7) , U. Siegenthaler (7) , M. L. Siggaard-Andersen (3) , R. Spahni (7) , J. P. Steffensen (3) , B. Stenni (21) , T. F. Stocker (7) , J. L. Tison (22) , R. Traversi (5) , R. Udisti (5) , F. Valero-Delgado (11) , M. R. van den Broeke (19) , R. S. W. Wan de Wal (19) , D. Wagenbach (23) , A. Wegner (11) , K. Weiler (11) , F. Wilhelms (11) , J. G. Winther (17) , E. Wolff (15)
Barbara Delmonte
D. Dick
  • Fonction : Auteur
J. Schmitt

Résumé

Precise knowledge of the phase relationship between climate changes in the two hemispheres is a key for understanding the Earth's climate dynamics. For the last glacial period, ice core studies1, 2 have revealed strong coupling of the largest millennial-scale warm events in Antarctica with the longest Dansgaard–Oeschger events in Greenland3, 4, 5 through the Atlantic meridional overturning circulation6, 7, 8. It has been unclear, however, whether the shorter Dansgaard–Oeschger events have counterparts in the shorter and less prominent Antarctic temperature variations, and whether these events are linked by the same mechanism. Here we present a glacial climate record derived from an ice core from Dronning Maud Land, Antarctica, which represents South Atlantic climate at a resolution comparable with the Greenland ice core records. After methane synchronization with an ice core from North Greenland9, the oxygen isotope record from the Dronning Maud Land ice core shows a one-to-one coupling between all Antarctic warm events and Greenland Dansgaard–Oeschger events by the bipolar seesaw6. The amplitude of the Antarctic warm events is found to be linearly dependent on the duration of the concurrent stadial in the North, suggesting that they all result from a similar reduction in the meridional overturning circulation.

Domaines

Glaciologie

Dates et versions

insu-00375263 , version 1 (14-04-2009)

Identifiants

Citer

C. Barbante, Jean-Marc Barnola, Silvia Becagli, J. Beer, M. Bigler, et al.. One-to-one coupling of glacial climate variability in Greenland and Antarctica. Nature, 2006, 444, pp.195 à 198. ⟨10.1038/nature05301⟩. ⟨insu-00375263⟩
377 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More