Climate response to volcanic forcing: Validation of climate sensitivity of a coupled atmosphere-ocean general circulation model
Article first published online: 5 NOV 2005
Copyright 2005 by the American Geophysical Union.
Geophysical Research Letters
Volume 32, Issue 21, November 2005
How to Cite
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., , , , , and (
- Issue published online: 5 NOV 2005
- Article first published online: 5 NOV 2005
- Manuscript Accepted: 23 SEP 2005
- Manuscript Revised: 29 JUL 2005
- Manuscript Received: 18 MAY 2005
 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.