Contribution of cloud condensate to surface rainfall process  

作　　者：ZHOU Yushu CUI Xiaopeng LI Xiaofan 

机构地区：[1]Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China [2]Joint Center for Satellite Data Assimilation and NOAA/NESDIS/Office of Research and Applications Camp Springs, Maryland, USA

出　　处：《Progress in Natural Science:Materials International》2006年第9期967-973,共7页自然科学进展·国际材料（英文版）

基　　金：Supported by National Natural Science Foundation of China (Giant Nos. 40405007, 40505012, 40505009) Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No. kzcx3-sw-225) "Outstanding Oversea Scholars" project of Chinese Academy of Sciences (Grant Nos. 2005-2-16, 2005-2-17 )the National Key Basic Research and Development Project of China (Grant No. 2004CB418302)

摘　　要：Contribution of cloud condensate to surface rainfall processes is investigated in a life span of tropical convection based on hourly data from a two-dimensional cloud resolving simulation. The model is forced by the large-scale vertical velocity, zonal wind and horizontal advections obtained from tropical ocean global atmosphere coupled ocean-atmosphere response experiment （TOGA COARE）. The results show that during the genesis, development, and decay of tropical convection, calculations with water vapor overestimate surface rain rate, and cloud condensate plays an important role in correcting overestimation in surface rain rates. The analysis is carried out in deep convective clouds and anvil clouds during the development of tropical convection. The surface rain rates calculated with water vapor in deep convective clouds and anvil clouds have similar magnitudes, the large surface rain rate appears in deep convective clouds due to the consumption of water hydrometeors whereas the small surface rain rate occurs in anvil clouds because of the gain of ice hydrometeors. Further analysis of the grid data shows that the surface rain rates calculated with water vapor and with cloud condensate are negatively correlated with the correlation coefficient of - 0.85, and the surface rain rate calculated with cloud condensate is mainly contributed to the water hydrometeors in the tropical deep convective regime.到表面降雨过程的云冷凝物的贡献在热带传送对流的一条寿命被调查基于时时从解决模拟的二维的云的数据，模型被大规模垂直速度强迫，带的风和水平移流从热带海洋获得了全球空气联合海洋空气反应实验(宽外袍 COARE )。结果证明在热带传送对流的开始，发展，和腐烂期间，有水蒸汽的计算过高估计表面雨率，并且遮蔽在在表面雨中在评价上改正的一个重要角色评估的冷凝物戏。分析在热带传送对流的发展期间在深对流的云和铁砧云被执行。在深对流的云和铁砧云与水蒸汽计算的表面雨率有类似的大小，而因为水疗院流星的获得，小表面雨率发生在铁砧云，大表面雨率由于水水疗院流星的消费出现在深对流的云。表面雨评估的格子数据表演的进一步的分析与水蒸汽推测冷凝物主要被贡献，与云，冷凝物否定地与 -0.85, 和与云计算的表面雨率的关联系数被相关在热带深对流的政体的水水疗院流星。

关 键 词：cloud condensate surface rain rate cloud resolving simulation. 

分 类 号：P426[天文地球—大气科学及气象学]