Warm summers during the Younger Dryas cold reversal

Show full item record



Permalink

http://hdl.handle.net/10138/238898

Citation

Schenk , F , Väliranta , M , Muschitiello , F , Tarasov , L , Heikkilä , M , Björck , S , Brandefelt , J , Johansson , A V , Näslund , J-O & Wohlfarth , B 2018 , ' Warm summers during the Younger Dryas cold reversal ' , Nature Communications , vol. 9 , 1634 . https://doi.org/10.1038/s41467-018-04071-5

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
Contributor: University of Helsinki, Helsinki Institute of Sustainability Science (HELSUS)
University of Helsinki, Environmental Change Research Unit (ECRU)
Date: 2018-04-24
Language: eng
Number of pages: 13
Belongs to series: Nature Communications
ISSN: 2041-1723
URI: http://hdl.handle.net/10138/238898
Abstract: 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.
Subject: ABRUPT CLIMATE-CHANGE
LAST GLACIAL MAXIMUM
NORTH-ATLANTIC
CENTRAL-EUROPE
THERMOHALINE CIRCULATION
ICE SHEETS
DEGLACIATION
GREENLAND
BP
RECONSTRUCTIONS
1172 Environmental sciences
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
s41467_018_04071_5.pdf 8.579Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record