uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The Role of Carbon Dioxide during the Onset of Antarctic Glaciation
Show others and affiliations
2010 (English)Conference paper, Published paper (Other academic)
Abstract [en]

Earth’s modern climate, characterized by polar ice sheets and large equator-to-pole temperature gradients, is rooted to environmental conditions that led to the glaciation of Antarctica ∼34 million years ago. Rapid Antarctic glacia- tion reflects a “tipping point” in Earth’s climate history and provides a target to investigate the contributing role of atmospheric carbon dioxide during climate change. For this study, we reconstruct CO2 trends using the alkenone- CO2 methodology, as well as changes in coccolithophore cell size, and show that CO2 declined just prior to-, and in association with, major Antarctic ice accumulation. We further show that CO2 estimates from Subantarctic and Antarctic sites do not reflect average atmospheric CO2 levels and yield spurious global CO2 trends if included in alkenone compilations. Substantial atmosphere-ocean CO2 disequilibrium evolved throughout the Southern Oceans, in conjunction with enhanced upwelling rates elsewhere, and potentially contributed to an apparent rise in atmospheric CO2 just prior to the CO2 decline associated with Antarctic glaciation. Our results imply high "Earth system" climate sensitivity to CO2, with sea-ice expansion and increased albedo playing an important role in enhancing global cooling.

 

Place, publisher, year, edition, pages
2010. 10904-10904 p.
Series
Geophysical Research Abstracts, ISSN 1029-7006 ; 12
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:uu:diva-136178OAI: oai:DiVA.org:uu-136178DiVA: diva2:376307
Conference
EGU General Assembly 2010, held 2-7 May, 2010 in Vienna, Austria
Available from: 2010-12-10 Created: 2010-12-10 Last updated: 2013-10-15Bibliographically approved

Open Access in DiVA

No full text

Authority records BETA

Henderiks, Jorijntje

Search in DiVA

By author/editor
Henderiks, Jorijntje
By organisation
Palaeobiology
Earth and Related Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 365 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf