区域气候模式在南水北调西线水源区的应用  

Study on application of RegCM3 in water sources area of West-route S-N Water Transfer Project

作　　者：张明珠[1] 严登华[1] 宋新山[2] 俞火亘 胡东来[1] 杨舒媛[1] 

机构地区：[1]中国水利水电科学研究院水资源所,北京100044 [2]东华大学环境科学与工程学院,上海200051

出　　处：《人民长江》2008年第8期33-35,51,共4页Yangtze River

基　　金：国家科技支撑计划重大资助项目(2006BAB04A08);科技部科研院所社会公益研究专项资助项目(2005DIB3J057)

摘　　要：为了检验高分辨率区域气候模式RegGM3对南水北调西线工程水源区气候的模拟能力，对1998年和2001年夏季气候进行了模拟试验，并针对模拟的温度场和降水场作具体分析。分别利用NCEP的温度数据和南水北调西线水源区内78个气象站点的逐日降水资料对温度场和降水场进行了检验分析。温度场的模拟结果表明，模式能较好地反映研究区域的温度场分布特征，但在数值上出现“冷偏差”，整体偏低4～7℃；模式很好地再现了西线水源区的夏季降水特征：两大降水高值区分别位于研究区域的西南部和东南部，西南部雨带呈东西分布，东南部雨带呈南北分布。模式对东部地区的降水模拟较接近实测值，但对西北部青藏高原周边地区的模拟效果较差。In order to test the capability of the high-resolution regional climate model RegCM3,climate simulation test for water sources area of West-route S-N Water Transfer Project for 1998 and 2001 summers is carried out.This paper makes emphasis on the analysis of air temperature and precipitation.Using daily air temperature data of NCEP and daily precipitation data of 78 meteorological stations over the research region,the check and analysis for temperature field and precipitation field are contrasted with the simulated results.The simulation of air temperature reviews that: the model has the ability to reflect the characteristics of the regional air temperature distribution,but the simulated air temperature data appears 'cold bias',which is 4～7℃ lower.The characteristics of the regional precipitation distribution has also well simulated: there are two regions of high value of precipitation,one is in southwest area of the region with a west-east rainband,and another in southeast with a north-south rainband.The simulated precipitation in eastern area is approach to the observed,and it is worse in the northwestern area around Qinghai-Tibet Plateau.

关 键 词：区域气候模式 模拟 气温 降水 

分 类 号：P461[天文地球—大气科学及气象学]