“99.6”梅雨锋暴雨云和降水物理过程的中尺度数值模拟

MESO-SCALE SIMULATION OF CLOUD AND PRECIPITATION PHYSICAL PROCESSES IN MEI-YU FRONT SYSTEM IN JUNE 1999

用MM5(V2)中尺度非静力数值模式对长江中下游地区的梅雨锋降水的云和降水进行模拟研究。对于可分辨尺度的降水,采用Reisner霰显式方案;对云内微物理过程特别是对各种水成物的源汇项进行了详细分析,以期深入了解梅雨锋云系内部的云物理过程。

The cloud and precipitation processes of mei-yu front rainfall during 25～28 Jun. 1999 in the area of yangtze river have been studied by mesoscale nonhydrostatic numerical model MM5(v2). The nonconvective precipitation are predicted by using the Reisner scheme. With analyses on cloud microphysical processes, especially on source and sink terms of hydrometeors, physical processes of mei-yu front cloud system can be understood clearly.