Variations rapides de l'excès en deutérium dans les glaces du Groenland: Un témoignage du couplage océan-atmosphère

Translated title of the contribution: Rapid deuterium-excess changes in Greenland ice cores: A link between the ocean and the atmosphere

Jean Jouzel*, Valérie Masson-Delmotte, Michel Stiévenard, Amaëlle Landais, Françoise Vimeux, Sigfus J. Johnsen, Arny E. Sveinbjörnsdottir, James W.C. White

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Rapid climatic changes, the rhythm of which is fully described in Greenland deep ice cores, are also very well documented in the ocean (in particular in the North Atlantic) and on the continent. At these timescales, ice cores, deep sea-cores and continental records are still difficult to precisely synchronize. From the GRIP results, we show how a multiparametric ice core study allows us to circumvent this difficulty. The co-isotopic analysis of the deuterium and oxygen-18 concentrations in ice gives access to temperature both at the site (central Greenland) and in the evaporative moisture source region (North Atlantic). Rapid changes occur more or less rapidly from one event to the next, but are generally simultaneous. Surprisingly, our results suggest that the site and source temperatures vary in antiphase. This implies a drastic reorganization of the hydrological cycle in the North Atlantic at the time of rapid changes.

Translated title of the contributionRapid deuterium-excess changes in Greenland ice cores: A link between the ocean and the atmosphere
Original languageFrench
Pages (from-to)957-969
Number of pages13
JournalComptes Rendus - Geoscience
Volume337
Issue number10-11
DOIs
Publication statusPublished - Aug 2005

Bibliographical note

Funding Information:
This work is a contribution to the Greenland Ice Core Project (GRIP) organized by the European Science Foundation. We thank the GRIP scientists, logistics support and core processors. We also thank the science foundations in Belgium, Denmark, France, Germany, Iceland, Italy, Switzerland, and in the United Kingdom, as well as the CEC programme.

Other keywords

  • Dansgaard-Oeschger events
  • Deuterium excess
  • GRIP ice core
  • Site and oceanic source
  • Temperature

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