一次特大暴雨(雪)天气过程的微物理模拟  

Numerical study on microphysical processes of an extraordinarily severe rain (snow) storm case

作　　者：王亮[1,2] 王春明[1] 何宏让[1] 吴志皇 

机构地区：[1]解放军理工大学气象学院 [2]解放军93220部队气象台 [3]解放军92403部队气象台

出　　处：《气象科学》2011年第2期170-178,共9页Journal of the Meteorological Sciences

摘　　要：利用非静力中尺度模式MM5(V3.7)模拟了2007年3月3—5日发生在辽宁地区的一次特大暴雨(雪)天气过程。分析在相同的天气形势背景下,不同降水类型中心各种水成物的相态分布特点,重点对各种水成物的源项进行详细分析。结果表明:雨水碰并雪成雨是雨水产生的主要云微物理过程,雪、霰和云水的碰并对雨水的形成起着非常重要的作用,在不同降水类型中心,霰和冰晶形成的主要云微物理过程相同,但雪形成的主要云微物理过程并不相同,而且降雪中心冰相粒子源项最大值的高度高于降雨中心冰相粒子源项最大值高度。In this paper,numerical simulation of an extraordinarily severe rain（snow）storm case that occurred in Liaoning Province during 3—5 March 2007 is carried out using the nonhydrostatic mesoscale model MM5（V3.7）.Under the same weather background,the distribution of hydrometeors,especially the source terms of hydrometeors are analyzed in detail between the two different precipitation type centers.It is demonstrated that the collection of snow by rain water is the primary cloud microphysical process of producing rain.The coalescence of snow,graupel and cloud water with rain water is very important to produce rain.The source of graupel and ice in the rainfall center is similar to that in the snowfall center,but the source of snow is different.The height of the source maximum of the ice phase particles in the snowfall center is greater than in the rainfall center.

关 键 词：云微物理 数值模拟 中尺度模式 

分 类 号：P458.121.1[天文地球—大气科学及气象学]