The Role of the Western Arabian Sea Upwelling in Indian Monsoon Rainfall Variability
作者： Takeshi Izumo , Clémentde Boyer Montégut , Jing-Jia Luo , Swadhin K Behera , Sébastien Masson
关键词: Monsoon rainfall 、 Monsoon 、 Indian monsoon rainfall 、 General Circulation Model 、 Spring (hydrology) 、 Sea surface temperature 、 Climatology 、 Environmental science 、 Upwelling 、 Oceanography 、 Indian ocean
摘要: Abstract The Indian summer monsoon rainfall has complex, regionally heterogeneous, interannual variations with huge socioeconomic impacts, but the underlying mechanisms remain uncertain. upwelling along Somalia and Oman coasts starts in late spring, peaks during monsoon, strongly cools sea surface temperature (SST) western Arabian Sea. They restrict westward extent of Ocean warm pool, which is main moisture source for rainfall. Thus, Somalia–Oman can have significant impacts on transport toward India. Here authors use both observations an advanced coupled atmosphere–ocean general circulation model to show that a decrease strengthens west coast India by increasing SST coasts, thus local evaporation water vapor Western Ghats (mountains). Further observational analysis reveals such decre...
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