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Warm summers during the Younger Dryas cold reversal

Nature communications, 2018-04, Vol.9 (1), p.1634-13, Article 1634 [Peer Reviewed Journal]

Copyright Nature Publishing Group Apr 2018 ;The Author(s) 2018 ;ISSN: 2041-1723 ;EISSN: 2041-1723 ;DOI: 10.1038/s41467-018-04071-5 ;PMID: 29691388

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Title:
Warm summers during the Younger Dryas cold reversal
Author: Schenk, Frederik ; Väliranta, Minna ; Muschitiello, Francesco ; Tarasov, Lev ; Heikkilä, Maija ; Björck, Svante ; Brandefelt, Jenny ; Johansson, Arne V ; Näslund, Jens-Ove ; Wohlfarth, Barbara
Subjects: Climate ; Climate change ; Climate Research ; Cold ; Cooling ; Deglaciation ; Earth and Related Environmental Sciences ; ENVIRONMENTAL SCIENCES ; Geovetenskap och miljövetenskap ; Ice sheets ; Indicator species ; Klimatforskning ; Meltwater ; Natural Sciences ; Naturvetenskap ; Palaeoceanography ; Palaeoclimate ; Simulation ; Summer
Is Part Of: Nature communications, 2018-04, Vol.9 (1), p.1634-13, Article 1634
Description: The Younger Dryas (YD) cold reversal interrupts the warming climate of the deglaciation with global climatic impacts. The sudden cooling is typically linked to an abrupt slowdown of the Atlantic Meridional Overturning Circulation (AMOC) in response to meltwater discharges from ice sheets. However, inconsistencies regarding the YD-response of European summer temperatures have cast doubt whether the concept provides a sufficient explanation. Here we present results from a high-resolution global climate simulation together with a new July temperature compilation based on plant indicator species and show that European summers remain warm during the YD. Our climate simulation provides robust physical evidence that atmospheric blocking of cold westerly winds over Fennoscandia is a key mechanism counteracting the cooling impact of an AMOC-slowdown during summer. Despite the persistence of short warm summers, the YD is dominated by a shift to a continental climate with extreme winter to spring cooling and short growing seasons.
Publisher: England: Nature Publishing Group
Language: English
Identifier: ISSN: 2041-1723
EISSN: 2041-1723
DOI: 10.1038/s41467-018-04071-5
PMID: 29691388
Source: PubMed (Medline)
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Warm summers during the Younger Dryas cold reversal

Copyright Nature Publishing Group Apr 2018 ;The Author(s) 2018 ;ISSN: 2041-1723 ;EISSN: 2041-1723 ;DOI: 10.1038/s41467-018-04071-5 ;PMID: 29691388

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