积云对流参数化方案对东亚夏季风模拟对比

利用MM5模式对比5种不同积云对流参数化方案,即Kuo方案、Grell方案、Kain-Fritsch方案、Betts-Miller方案和赵思雄修改的Kuo方案对东亚季风区强、弱季风年夏季风的模拟能力。结果表明:5种对流参数化方案对各季节都有一定的模拟能力,各个方案对降雨的预报能力随地区和年际而有所不同,对强季风年grell和bm方案对雨带特征的描述较好,对弱季风年bm和zhao方案对雨带的模拟与实际最为接近。

Comparative Study of Cumulus Convective Parameterization Schemes for Summer East Asian Monsoon

With 5 different cumulus convective parameterization schemes(CPS),Kuo-Anthes(Kuo),Grell(Grell),Kain-Fritsch(KF),Betts-Miller(BM) and Zhao Sixiong(Zhao,a modified Kuos) in MM5 model,this paper studies respectively 1991 weak monsoon year and 1994 strong monsoon year on spatial pattern of westerly jet,location and intensity of precipitation,and moisture transport of East Asia monsoon rain belt in summer time.The study shows,the five CPS all forecast well in predicting summer monsoon,while their precipitation forecast ability differs with area and monsoon year.grell and bm are more efficient in forecasting strong monsoon,bm and zhao are better for weak monsoons.