Climate response to volcanic forcing: Validation of climate sensitivity of a coupled atmosphere-ocean general circulation model

Tokuta Yokohata, S. Emori, T. Nozawa, Y. Tsushima, T. Ogura, M. Kimoto

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Two versions of a coupled atmosphere-ocean general circulation model (GCM) with different climate sensitivities are tested on global cooling following the Pinatubo volcanic eruption to investigate the validity of high climate sensitivities. The higher-sensitivity version, with climate sensitivity of 6.3 K for doubled CO2 forcing, overestimates cooling due to the volcanic eruption, whereas the lower-sensitivity version (4.0 K) produces results consistent with observations. A simple scheme for climate feedback analysis is devised and it is found that the difference between the two versions is attributed to cloud-albedo feedback. This validation method is expected to provide additional constraints on climate sensitivity and possibly lead to reduced uncertainties in climate prediction.

Original languageEnglish
Article numberL21710
Pages (from-to)1-4
Number of pages4
JournalGeophysical Research Letters
Volume32
Issue number21
DOIs
Publication statusPublished - Nov 16 2005
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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