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Publication:
Ice core evidence for the extent of past atmospheric CO2 change due to iron fertilisation

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cris.virtual.author-orcid0000-0002-9483-6030
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cris.virtualsource.author-orcidc70848d5-2add-4c31-8df3-2af0f3b56bbd
dc.contributor.authorRöthlisberger, R.
dc.contributor.authorBigler, Matthias
dc.contributor.authorWolff, E. W.
dc.contributor.authorJoos, Fortunat
dc.contributor.authorMonnin, E.
dc.contributor.authorHutterli, Manuel
dc.date.accessioned2024-09-02T17:46:50Z
dc.date.available2024-09-02T17:46:50Z
dc.date.issued2004
dc.description.abstractAn extended high-resolution ice core record of dust deposition over the past 60 ka from Dome C, Antarctica, is presented. The data are in conflict with the idea that changes in aeolian iron input into the Southern Ocean were the major cause for the 80 ppm glacial-interglacial CO2 increase. During the deglaciation, the CO2 increase shows a linear relationship with the fall of the logarithm of the nss-Ca2+ flux, a proxy for dust deposition. However, the very large variations in the nss-Ca2+ flux related to the glacial Antarctic warm events A1 to A4 were accompanied by small CO2 variations only. Our data-based analysis suggests that decreased Southern Ocean dust deposition caused at most a 20 ppm increase in CO2 at the last glacial-interglacial transition. Rapid decreases in dust deposition to the northern Pacific could have been responsible for a maximum of 8 ppm in addition.
dc.description.numberOfPages4
dc.description.sponsorshipPhysikalisches Institut, Klima- und Umweltphysik (KUP)
dc.identifier.doi10.48350/158451
dc.identifier.publisherDOI10.1029/2004GL020338
dc.identifier.urihttps://boris-portal.unibe.ch/handle/20.500.12422/43146
dc.language.isoen
dc.publisherAmerican Geophysical Union
dc.relation.ispartofGeophysical Research Letters
dc.relation.issn0094-8276
dc.relation.organizationDCD5A442BF29E17DE0405C82790C4DE2
dc.subject.ddc500 - Science::530 - Physics
dc.titleIce core evidence for the extent of past atmospheric CO2 change due to iron fertilisation
dc.typearticle
dspace.entity.typePublication
oaire.citation.issue16
oaire.citation.volume31
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oairecerif.author.affiliationPhysikalisches Institut, Klima- und Umweltphysik (KUP)
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oairecerif.author.affiliationPhysikalisches Institut, Klima- und Umweltphysik (KUP)
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oairecerif.author.affiliationPhysikalisches Institut, Klima- und Umweltphysik (KUP)
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unibe.date.licenseChanged2021-09-06 07:27:47
unibe.description.ispublishedpub
unibe.eprints.legacyId158451
unibe.journal.abbrevTitleGEOPHYS RES LETT
unibe.refereedTRUE
unibe.subtype.articlejournal

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