高分辨嵌套区域气候模式对我国中、东部地区夏季气候的数值模拟

利用引进的ＮＣＡＲ＿ＲｅｇＣＭ２模式在较高分辨率情况下，对我国东部地区夏季气候状况进行了数值模拟。结果表明，模式能够较真实地再现我国东部 地区夏季气候的基本状况。模拟的海平面气压场、５００ｈＰａ高度场、地表温度场以及对流层高、低层风场等的分布形式，都与实测场比较一致。并且较好地模拟出了７月中旬副热带的北跳。模式模拟的夏季降水场分布形式也与观测结果一致。高、低值中心等对应较好，不足之处是模拟中心值测

SIMULATION OF SUMMER CLIMATE OVER CENTER AND EAST CHINA USING A HIGH RESOLUTION NESTED REGIONAL CLIMATE MODEL

A higher resolution nested regional climate model (NCAR RegCM2) is used to simulate the center and east China summer (July) climate. The results show that the model can simulate the base situation of the local climate. The patterns of the simulated sea level pressure,500 hPa height,ground temperature and the wind of upper and lower troposphere are consistence with the observation,the simulated summer precipitation pattern also consists with the observation,but the central values are not the same as observation. The high value centers are greater while the low value centers are smaller,especially the high value center over the upper reach of the Yellow River is about 500% greater than the observed one and the low value center to south of the Yangtze River is about 100% lower than the observation. It may be caused by the lateral boundary condition. The averaged value of simulated July precipitation over North China,173.5 mm. It is very close to the observed value.