A modeling study of relation between cloud amount and SST over Western Tropical Pacific cloudy regions during TOGA COARE

作     者：Shouting Gaoa,Xiaopeng Cui a,Xiaofan Li b a Laboratory of Cloud-Precipitation Physics and Severe Storms (LACS),Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China b Joint Center for Satellite Data Assimilation and NOAA/NESDIS/Center for Satellite Applications and Research,Camp Springs,MD,USA 

作者机构：Laboratory of Cloud-Precipitation Physics and Severe Storms (LACS) Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Joint Center for Satellite Data Assimilation and NOAA/NESDIS/Center for Satellite Applications and Research Camp Springs MD USA 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2009年第19卷第2期

页      面：187-193页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0706[理学-大气科学] 0702[理学-物理学] 

基　　金：supported by the National Basic Research Program of China (Grant No.2004CB418301) the Chinese Academy of Sciences (Grant No.KCL14014) the National Natural Sciences Foundation of China (GrantNo.40433007) the Knowledge Innovation Project of Chinese Academy of Sciences (No.IAP07214) 

主　　题：Cloud amount Sea surface temperature Coupled ocean-cloud resolving atmosphere model TOGA COARE 

摘      要：The relationship between cloud amount and sea surface temperature (SST) over Western Tropical Pacific cloudy regions during TOGA COARE is investigated based on hourly grid simulation data from a two-dimensional coupled ocean-cloud resolving atmosphere model. The model is forced by the large-scale vertical velocity and zonal wind observed and derived from TOGA COARE for a 50-day period. The cloud amount becomes smaller when the ocean surface gets warmer,which is similar to previous relations obtained from observational analyses. As SST increases,the atmospheric temperature increases whereas the surface sensible heat flux decreases. The atmospheric water vapor is not sensitive to SST whereas the surface evaporation flux decreases as SST increases. These indicate that the oceanic effects do not play an important role in determining atmospheric heat and water vapor budgets. The cold atmosphere pro-duces a larger amount of ice clouds that cover a larger area than the warm atmosphere does. The large amounts of ice clouds lead to cooling of the ocean surface through reflecting large amount of solar radiation back to the space. Thus,the negative correlation between the cloud amount and SST only accounts for the important atmospheric effects on the ocean.