Insolation triggered abrupt weakening of Atlantic circulation at the end of interglacials

Author:

Yin Q. Z.1ORCID,Wu Z. P.12ORCID,Berger A.1,Goosse H.1ORCID,Hodell D.3ORCID

Affiliation:

1. Georges Lemaître Center for Earth and Climate Research, Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium.

2. Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China.

3. Godwin Laboratory for Palaeoclimate Research, Department of Earth Sciences, University of Cambridge, Cambridge, UK.

Abstract

Cooling threshold The end of each interglacial period over the past 800,000 years was characterized by large, abrupt cooling episodes that were distinct from the gradual decrease in insolation that was occurring. Why did these sudden coolings occur? Yin et al . used a suite of climate models to show that an insolation threshold exists, beneath which the slow decrease of energy from the sun leads to rapid climate cooling. This effect results from weakening of the Atlantic meridional overturning circulation involving sea ice feedbacks in the Nordic and Labrador Seas. —HJS

Funder

Fonds De La Recherche Scientifique - FNRS

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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