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Publication:
Atmospheric radiocarbon during the Younger Dryas: production, ventilation, or both?

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cris.virtual.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtual.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtual.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
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cris.virtualsource.author-orcid46d13f97-a7ed-4563-b9ac-ba3a7ef16c50
cris.virtualsource.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
dc.contributor.authorMarchal, Olivier
dc.contributor.authorStocker, Thomas
dc.contributor.authorMuscheler, Raimund
dc.date.accessioned2024-09-02T17:47:31Z
dc.date.available2024-09-02T17:47:31Z
dc.date.issued2001
dc.description.abstractA new reconstruction of past atmospheric Δ14C (Δ14Catm) based on Polish lake varved sediments has suggested that previous Δ14Catm values (e.g. from the Cariaco basin record) for the beginning of the Younger Dryas cold event (YD) are overestimates and that the Δ14Catm rise at the YD onset could only be due to changes in atmospheric 14C production (PC-14). This result would have profound climatic implications, for the YD is a paradigm example of abrupt climate change which is usually thought to have been triggered by a reduction in the northward heat flux by the Atlantic thermohaline circulation. Here we examine results from a large number of simulations (300) based on a zonally averaged ocean circulation model, to constrain the effect on Δ14Catm of PC-14 changes during the YD as reconstructed from a Greenland ice core record of 10Be flux. Our results suggest that the scatter in the lake data set is too large to exclude the probable change in deep ocean ventilation at the onset of the YD. By contrast, the model fit to the higher Δ14Catm levels throughout the YD detected in the marine record is generally better when a substantial decrease in deep ocean ventilation is simulated. The early Δ14Catm drawdown that initiated during the first half of the YD, however, could entirely be due to production changes. If this was the case, the drawdown would not reflect an increasing formation of North Atlantic Intermediate Water or Southern Ocean water, as previously suggested. The rapid Δ14Catm rise at the YD onset documented in the marine record, however, remains unexplained.
dc.description.numberOfPages13
dc.description.sponsorshipPhysikalisches Institut, Klima- und Umweltphysik (KUP)
dc.identifier.doi10.48350/158539
dc.identifier.publisherDOI10.1016/S0012-821X(00)00383-6
dc.identifier.urihttps://boris-portal.unibe.ch/handle/20.500.12422/43203
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofEarth and planetary science letters
dc.relation.issn0012-821X
dc.relation.organizationDCD5A442BF29E17DE0405C82790C4DE2
dc.subject.ddc500 - Science::530 - Physics
dc.titleAtmospheric radiocarbon during the Younger Dryas: production, ventilation, or both?
dc.typearticle
dspace.entity.typePublication
oaire.citation.endPage395
oaire.citation.issue3-4
oaire.citation.startPage383
oaire.citation.volume185
oairecerif.author.affiliation#PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliationPhysikalisches Institut, Klima- und Umweltphysik (KUP)
oairecerif.author.affiliation#PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation2#PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation2#PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation2#PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation3#PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation3#PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation3#PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation4#PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation4#PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation4#PLACEHOLDER_PARENT_METADATA_VALUE#
unibe.contributor.rolecreator
unibe.contributor.rolecreator
unibe.contributor.rolecreator
unibe.date.licenseChanged2021-09-15 13:41:20
unibe.description.ispublishedpub
unibe.eprints.legacyId158539
unibe.journal.abbrevTitleEARTH PLANET SC LETT
unibe.refereedTRUE
unibe.subtype.articlejournal

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