The migration of publications from boris.unibe.ch to this platform is still ongoing. During this time, all publications remain accessible via their DOIs on both platforms. Please refrain from adding duplicates on this platform, as those will delay the migration and will be deleted eventually.
 

Publication:
Carbon isotope composition of atmospheric CO2 during the last ice age from an Antarctic ice core

Simple item page
cris.virtual.author-orcid0000-0003-4299-6793
cris.virtual.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtual.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtualsource.author-orcidfeb2f13c-3ddd-414c-88f2-b13b839544a4
cris.virtualsource.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtualsource.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
dc.contributor.authorLeuenberger-Lüthy, Markus Christian
dc.contributor.authorSiegenthaler, Ulrich
dc.contributor.authorLangway, Chester C.
dc.date.accessioned2024-09-02T17:43:23Z
dc.date.available2024-09-02T17:43:23Z
dc.date.issued1992
dc.description.abstractBubbles of ancient air in polar ice cores have revealed that the atmospheric concentration of CO2 during the Last Glacial Maximum was 180–200 p.p.m.v., substantially lower than the pre-industrial value of about 280 p.p.m.v. (refs 1, 2). It is generally thought that this reduction in atmospheric CO2 during glacial time was driven by oceanic processes. The most likely explanations invoke either a decrease in dissolved CO2 in surface waters because of a more efficient 'biological pump' transporting carbon to deep waters, or a higher alkalinity in the glacial ocean as a consequence of changes in carbonate dissolution or sedimentation3. Because isotope fractionation during photosynthesis depletes 13C in the organic matter produced, changes in the biological pump would alter the carbon isotope composition of atmospheric CO2, whereas changes in alkalinity would in themselves have no such effect. Here we report measurements of the carbon isotope content of CO2 in ice cores from Byrd Station, Antarctica, in an attempt to distinguish between these mechanisms. We find that during the ice age the reduced isotope ratio δ13C was more negative than pre-industrial values by 0.3 ±0.2%,. Although this result does not allow us to discriminate definitely between the two possible causes of lower glacial atmospheric CO2. it does indicate that changes in the strength of the biological pump cannot alone have been responsible.
dc.description.numberOfPages3
dc.description.sponsorshipPhysikalisches Institut, Klima- und Umweltphysik (KUP)
dc.identifier.doi10.48350/158241
dc.identifier.publisherDOI10.1038/357488a0
dc.identifier.urihttps://boris-portal.unibe.ch/handle/20.500.12422/43000
dc.language.isoen
dc.publisherNature Publishing Group
dc.relation.ispartofNature
dc.relation.issn0028-0836
dc.relation.organizationDCD5A442BF29E17DE0405C82790C4DE2
dc.subject.ddc500 - Science::530 - Physics
dc.titleCarbon isotope composition of atmospheric CO2 during the last ice age from an Antarctic ice core
dc.typearticle
dspace.entity.typePublication
oaire.citation.endPage490
oaire.citation.issue6378
oaire.citation.startPage488
oaire.citation.volume357
oairecerif.author.affiliationPhysikalisches Institut, Klima- und Umweltphysik (KUP)
oairecerif.author.affiliation#PLACEHOLDER_PARENT_METADATA_VALUE#
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.licenseChanged2021-08-18 07:06:36
unibe.description.ispublishedpub
unibe.eprints.legacyId158241
unibe.journal.abbrevTitleNATURE
unibe.refereedTRUE
unibe.subtype.articlejournal

Files

Original bundle
Now showing 1 - 1 of 1
Name:
leuenberger92nat_a.pdf
Size:
372.17 KB
Format:
Adobe Portable Document Format
License:
publisher
Content:
published
Download

Collections

Publications