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

doi:10.1029/2005GL023542

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 journal › Article › peer-review

37 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 language	English
Article number	L21710
Pages (from-to)	1-4
Number of pages	4
Journal	Geophysical Research Letters
Volume	32
Issue number	21
DOIs	https://doi.org/10.1029/2005GL023542
Publication status	Published - Nov 16 2005
Externally published	Yes

ASJC Scopus subject areas

Geophysics
Earth and Planetary Sciences(all)

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1029/2005GL023542

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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.",

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AU - Yokohata, Tokuta

AU - Emori, S.

AU - Nozawa, T.

AU - Tsushima, Y.

AU - Ogura, T.

AU - Kimoto, M.

PY - 2005/11/16

Y1 - 2005/11/16

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

Abstract

ASJC Scopus subject areas

UN SDGs

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