P1.0
The role of thermodynamic air-sea coupling in the Indian Ocean
Daeho Jin, George Mason University, Fairfax, VA; and B. P. Kirtman and R. Wu
Previous studies have argued that air-sea coupling in the Indian Ocean plays important role in simulating Indian monsoon rainfall (IMR) in general circulation models (GCM). While these studies used fully coupled GCM (CGCM), this study focuses on thermodynamic coupling by simplifying CGCM. Our model is atmospheric GCM (AGCM), which is coupled to a simple mixed-layer ocean model in the Indian Ocean and prescribed SST from observations in the other basins. With this Indian mixed-layer (IMXL) experiment results, we examine the relationship between IMR and other climate variables. The overall precipitation in IMXL is not significantly better than the uncoupled AGCM in terms of the mean and variance. However, the co-variability with the Pacific SST is much improved. This result confirms that thermodynamic coupling in the Indian Ocean is important in terms of simulating ENSO-monsoon relationship.
Poster Session 1, All Submissions
Sunday, 29 January 2006, 1:00 PM-5:00 PM
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