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Arctic sea ice simulation in the PlioMIP ensemble

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)749-767
Number of pages19
JournalClimate of the Past
Volume12
Issue number3
Early online date23 Mar 2016
DOIs
DateAccepted/In press - 10 Mar 2016
DateE-pub ahead of print - 23 Mar 2016
DatePublished (current) - Mar 2016

Abstract

Eight general circulation models have simulated the mid-Pliocene warm period (mid-Pliocene, 3.264 to 3.025 Ma) as part of the Pliocene Modelling Intercomparison Project (PlioMIP). Here, we analyse and compare their simulation of Arctic sea ice for both the pre-industrial period and the mid-Pliocene. Mid-Pliocene sea ice thickness and extent is reduced, and the model spread of extent is more than twice the pre-industrial spread in some summer months. Half of the PlioMIP models simulate ice-free conditions in the mid-Pliocene. This spread amongst the ensemble is in line with the uncertainties amongst proxy reconstructions for mid-Pliocene sea ice extent. Correlations between mid-Pliocene Arctic temperatures and sea ice extents are almost twice as strong as the equivalent correlations for the pre-industrial simulations. The need for more comprehensive sea ice proxy data is highlighted, in order to better compare model performances.

    Research areas

  • model intercomparison project, mid-pliocene climate, meridional, overturning circulation coupled model experimental-design, warm period ocean cover, variability thickness

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  • Full-text PDF (final published version)

    Rights statement: This is the final published version of the article (version of record). It first appeared online via EGU at http://www.clim-past.net/12/749/2016/. Please refer to any applicable terms of use of the publisher.

    Final published version, 3.62 MB, PDF document

    Licence: CC BY

  • Supplementary information PDF

    Rights statement: This is the final published version of the article (version of record). It first appeared online via EGU at http://www.clim-past.net/12/749/2016/. Please refer to any applicable terms of use of the publisher.

    Final published version, 3.61 MB, PDF document

    Licence: CC BY

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