Preprints
https://doi.org/10.5194/acpd-11-22893-2011
https://doi.org/10.5194/acpd-11-22893-2011

  15 Aug 2011

15 Aug 2011

Review status: this preprint was under review for the journal ACP but the revision was not accepted.

Observed and model simulated 20th century Arctic temperature variability: Canadian Earth System Model CanESM2

P. Chylek1, J. Li2, M. K. Dubey1, M. Wang3, and G. Lesins4 P. Chylek et al.
  • 1Los Alamos National Laboratory, Los Alamos, New Mexico, USA
  • 2Canadian Centre for Climate Modelling and Analysis, Victoria, British Columbia, Canada
  • 3University of Washington, Seattle, Washington, USA
  • 4Dalhousie University, Halifax, Nova Scotia, Canada

Abstract. We present simulations of the 20th century Arctic temperature anomaly from the second generation Canadian Earth System Model (CanESM2). The new model couples together an atmosphere-ocean general circulation model, a land-vegetation model and terrestrial and oceanic interactive carbon cycle. It simulates well the observed 20th century Arctic temperature variability that includes the early and late 20th century warming periods and the intervening 1940–1970 period of substantial cooling. The addition of the land-vegetation model and the terrestrial and oceanic interactive carbon cycle to the coupled atmosphere-ocean model improves the agreement with observations from 1900–1970, however, it increases the overestimate of the post 1970 warming. In contrast the older generation coupled atmosphere-ocean general circulation models Canadian CanCM3 and NCAR/LANL CCSM3, used in the IPCC 2007 climate change assessment report, overestimate the rate of the 20th century Arctic warming by factor of two to three and they are unable to reproduce the observed 20th century Arctic climate variability.

P. Chylek et al.

 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

P. Chylek et al.

P. Chylek et al.

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