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Inversion du froid Younger Dryas due à l'eau douce arctique.

Arctic freshwater forcing of the Younger Dryas cold reversal.

Auteurs : TARASOV L., PELTIER W. R.

Type d'article : Article

Résumé

The last deglaciation was abruptly interrupted by a millenial-scale reversal to glacial conditions, the Younger Dryas cold event. This cold interval has been connected to a decrease in the rate of North Atlantic Deep Water formation and to a resulting weakening of the meridional overturning circulation owing to surface water freshening. In contrast, an earlier input of fresh water (meltwater pulse 1a), whose origin is disputed, apparently did not lead to a reduction of the meridional overturning circulation. In the article, the authors analyse an ensemble of simulations of the drainage chronology of the North American ice sheet in order to identify the geographical release points of freshwater forcing during deglaciation.

Détails

  • Titre original : Arctic freshwater forcing of the Younger Dryas cold reversal.
  • Identifiant de la fiche : 2006-0476
  • Langues : Anglais
  • Sujet : Environnement, Généralités
  • Source : Nature - vol. 435 - n. 7042
  • Date d'édition : 02/06/2005

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