不同积云对流参数化方案对中国东部降水模拟的对比分析  

Effects of cumulus convective parameterization on the precipitation simulation over Eastern China with P-σRCM9 regional climate model

作　　者：顾茗 黄安宁[2] 

机构地区：[1]南通市气象局,江苏南通226006 [2]南京大学大气科学系,南京210093

出　　处：《气象科学》2008年第5期488-493,共6页Journal of the Meteorological Sciences

基　　金：国家自然科学基金资助项目(40333026)

摘　　要：本文将目前国际上气候模式中应用比较广泛的三种积云对流参数化方案引入到P-σRCM9区域气候模式中,并考察了不同积云对流参数化方案对P-σRCM9区域气候模式模拟中国降水性能的影响。分析发现四种积云对流参数化方案(包括原方案)下模拟的积云对流加热率基本上都呈现出单峰特征,且加热峰值出现在对流层中低层。并发现积云对流参数化方案对冬季降水平均场和年际变率模拟的影响较小,而对夏季降水模拟的影响更加重要。同时注意到Kuo方案和Anthes-Kuo方案模拟的冬、夏季降水平均场和年际变率均较其他两个方案更接近观测。Three cumulus convective parameterizations which are comprehensively applied in international climate models at present have been introduced to P-σRCM9 regional climate model, and the effects of each cumulus convective parameterization on the P-σRCM9＇s performance in simulating the precipitation over China have been examined in this paper. It is shown that the simulated cumulus convective heating rates under the four cumulus convective parameterizations basically have one peak and the peaks appear in mid-lower troposphere. It is also shown that cumulus convective parameterization has little effect on the P-σRCM9＇s performance in simulating the climatic mean precipitation and precipitation interannual variability, but it has significant effect on simulating the precipitation in summer. Meanwhile, it is noted that the precipitation mean fields and interannual variation in summer and winter simulated with Kuo and Anthes-Kuo schemes are closer to the observation than other two cumulus convective schemes.

关 键 词：区域气候模式 积云对流参数化 降水 

分 类 号：P426.61[天文地球—大气科学及气象学]