Authors: Wenting Hu Anmin Duan Guoxiong Wu
Publish Date: 2013/04/17
Volume: 30, Issue: 3, Pages: 607-620
Abstract
The capability of the current version of the airsea coupled climate model the Flexible Global OceanAtmosphereLand System model Spectral Version 2 FGOALSs2 in simulating the boreal summer intraseasonal oscillation ISO over the south Asian monsoon SAM region is diagnosed in terms of dominant period propagation direction and vertical structure Results show that the coupled model can reasonably simulate the main features of observed ISO propagation compared to the chosen AGCM These features include the eastward movement of intraseasonal 850hPa zonal wind over the Arabian Sea and Bay of Bengal the vertical structure in active phases and the realistic phase relationship between ISO and underlying SST However the eastward propagation cannot be reproduced in the uncoupled model This suggests that airsea interaction is important in generating intraseasonal variability over the SAM region Nevertheless some deficiencies remain in the coupled model which may relate to physical processes depicted by the cumulus parameterization and PBL schemes within its atmospheric component
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