Title of article :
Rapid deuterium-excess changes in Greenland ice cores: a link between the ocean and the atmosphere
Author/Authors :
Jouzel، نويسنده , , Jean and Masson-Delmotte، نويسنده , , Valérie and Stiévenard، نويسنده , , Michel and Landais، نويسنده , , Amaëlle and Vimeux، نويسنده , , Françoise and Johnsen، نويسنده , , Sigfus J. and Sveinbjِrnsdottir، نويسنده , , Arny E. and White، نويسنده , , James W.C. White، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
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. To cite this article: J. Jouzel et al., C. R. Geoscience 337 (2005).
Keywords :
Temperature , deuterium excess , Température , Dansgaard–Oeschger events , Evénements de Dansgaard–Oeschger , GRIP ice core , Site and oceanic source , Carotte de GRIP , Excès en deutérium , Site et source océanique
Journal title :
Comptes Rendus Geoscience
Journal title :
Comptes Rendus Geoscience