Estimated strength of the Atlantic overturning circulation during the last deglaciation Ritz, S en_US Stocker, T en_US Grimalt, J en_US Menviel, Laurie en_US Timmermann, A en_US 2021-11-25T12:30:18Z 2021-11-25T12:30:18Z 2013 en_US
dc.description.abstract The Atlantic meridional overturning circulation affects the latitudinal distribution of heat, and is a key component of the climate system. Proxy reconstructions, based on sedimentary Pa-231/Th-230 ratios and the difference between surface-and deep-water radiocarbon ages, indicate that during the last glacial period, the overturning circulation was reduced during millennial-scale periods of cooling(1-5). However, much debate exists over the robustness of these proxies(6-8). Here e combine proxy reconstructions of sea surface and air temperatures and a global climate model to quantitatively estimate changes in the strength of the Atlantic meridional overturning circulation during the last glacial period. We find that, relative to the Last Glacial Maximum, the overturning circulation was reduced by approximately 14 Sv during the cold Heinrich event 1. During the Younger Dryas cold event, the overturning circulation was reduced by approximately 12 Sv, relative to the preceding warm interval. These changes are consistent with qualitative estimates of the overturning circulation from sedimentary Pa-231/Th-230 ratios. In addition, we find that the strength of the overturning circulation during the Last Glacial Maximum and the Holocene epoch are indistinguishable within the uncertainty of the reconstruction. en_US
dc.identifier.issn 1752-0894 en_US
dc.language English
dc.language.iso EN en_US
dc.rights CC BY-NC-ND 3.0 en_US
dc.rights.uri en_US
dc.source Legacy MARC en_US
dc.title Estimated strength of the Atlantic overturning circulation during the last deglaciation en_US
dc.type Journal Article en
dcterms.accessRights open access
dspace.entity.type Publication en_US
unsw.description.publisherStatement Published version available at: en_US
unsw.identifier.doiPublisher en_US
unsw.relation.faculty Science
unsw.relation.fundingScheme GRACCIE (CONSOLIDER-INGENIO), Swiss National Science Foundation en_US
unsw.relation.ispartofissue 3 en_US
unsw.relation.ispartofjournal Nature Geoscience en_US
unsw.relation.ispartofpagefrompageto 208-212 en_US
unsw.relation.ispartofvolume 6 en_US
unsw.relation.originalPublicationAffiliation Ritz, S en_US
unsw.relation.originalPublicationAffiliation Stocker, T en_US
unsw.relation.originalPublicationAffiliation Grimalt, J en_US
unsw.relation.originalPublicationAffiliation Menviel, Laurie, Climate Change Research Centre (CCRC), Faculty of Science, UNSW en_US
unsw.relation.originalPublicationAffiliation Timmermann, A en_US School of Biological, Earth & Environmental Sciences *
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