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Read Full Article (file size: 126109 bytes) Cited by
GEOPHYSICAL RESEARCH LETTERS,
VOL. 32,
L21710,
doi:10.1029/2005GL023542,
2005
Climate response to volcanic forcing: Validation of climate sensitivity of a coupled atmosphere-ocean general circulation
model
T. Yokohata
Atmospheric Environment Division, National Institute for Environmental Studies, Tsukuba, Japan
S. Emori
Atmospheric Environment Division, National Institute for Environmental Studies, Tsukuba, Japan Frontier Research Center for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
T. Nozawa
Atmospheric Environment Division, National Institute for Environmental Studies, Tsukuba, Japan
Y. Tsushima
Frontier Research Center for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
T. Ogura
Atmospheric Environment Division, National Institute for Environmental Studies, Tsukuba, Japan
M. Kimoto
Center for Climate System Research, University of Tokyo, Kashiwa, Japan
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.
Received 18
May
2005;
accepted 23
September
2005;
published 5
November
2005.
Index Terms: 0370 Atmospheric Composition and Structure: Volcanic effects (8409); 3339 Atmospheric Processes: Ocean/atmosphere interactions (0312, 4504).
Read Full Article (file size: 126109 bytes) Cited by
Citation: Yokohata, T., S. Emori, T. Nozawa, Y. Tsushima, T. Ogura, and M. Kimoto
(2005),
Climate response to volcanic forcing: Validation of climate sensitivity of a coupled atmosphere-ocean general circulation
model,
Geophys. Res. Lett.,
32,
L21710,
doi:10.1029/2005GL023542.
Copyright 2005 by the American Geophysical Union.
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