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Publication:
Strong hemispheric coupling of glacial climate through freshwater discharge and ocean circulation

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cris.virtualsource.author-orcid46d13f97-a7ed-4563-b9ac-ba3a7ef16c50
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dc.contributor.authorKnutti, R.
dc.contributor.authorFlückiger, J.
dc.contributor.authorStocker, Thomas
dc.contributor.authorTimmermann, A.
dc.date.accessioned2024-09-02T17:43:11Z
dc.date.available2024-09-02T17:43:11Z
dc.date.issued2004
dc.description.abstractThe climate of the last glacial period was extremely variable, characterized by abrupt warming events in the Northern Hemisphere, accompanied by slower temperature changes in Antarctica and variations of global sea level. It is generally accepted that this millennial-scale climate variability was caused by abrupt changes in the ocean thermohaline circulation. Here we use a coupled ocean–atmosphere–sea ice model to show that freshwater discharge into the North Atlantic Ocean, in addition to a reduction of the thermohaline circulation, has a direct effect on Southern Ocean temperature. The related anomalous oceanic southward heat transport arises from a zonal density gradient in the subtropical North Atlantic caused by a fast wave-adjustment process. We present an extended and quantitative bipolar seesaw concept that explains the timing and amplitude of Greenland and Antarctic temperature changes, the slow changes in Antarctic temperature and its similarity to sea level, as well as a possible time lag of sea level with respect to Antarctic temperature during Marine Isotope Stage 3.
dc.description.numberOfPages6
dc.description.sponsorshipPhysikalisches Institut, Klima- und Umweltphysik (KUP)
dc.identifier.doi10.48350/158223
dc.identifier.publisherDOI10.1038/nature02786
dc.identifier.urihttps://boris-portal.unibe.ch/handle/20.500.12422/42983
dc.language.isoen
dc.publisherNature Publishing Group
dc.relation.ispartofNature
dc.relation.issn0028-0836
dc.relation.organizationDCD5A442BF29E17DE0405C82790C4DE2
dc.subject.ddc500 - Science::530 - Physics
dc.titleStrong hemispheric coupling of glacial climate through freshwater discharge and ocean circulation
dc.typearticle
dspace.entity.typePublication
oaire.citation.endPage856
oaire.citation.issue7002
oaire.citation.startPage851
oaire.citation.volume430
oairecerif.author.affiliation#PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation#PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliationPhysikalisches Institut, Klima- und Umweltphysik (KUP)
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unibe.date.licenseChanged2021-08-17 09:21:58
unibe.description.ispublishedpub
unibe.eprints.legacyId158223
unibe.journal.abbrevTitleNATURE
unibe.refereedTRUE
unibe.subtype.articlejournal

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