1991年梅雨锋云系的中尺度分析  

THE MESOSCALE ANALYSIS OF THE MEI-YU FRONT CLOUD SYSTEM IN 1991

作　　者：项续康[1] 马岚[1] 王大昌[1] 

机构地区：[1]国家卫星气象中心,北京100081

出　　处：《应用气象学报》1993年第3期286-292,共7页Journal of Applied Meteorological Science

基　　金：<八五>江淮流域持续性特大暴雨过程的成因研究课题

摘　　要：根据数字展宽云图和常规资料分析得到,1991年梅雨期江淮地区大 暴雨大多是由中尺度云团产生的。它主要是:低涡暖切云团和冷切(冷锋)云团。它们的大多数是中—β尺度云团,平均维持时间为5—6小时,平均最低云顶温度为-69℃左右。低涡暖切云团产生于低涡中心东侧,低空急流轴的左前方。而冷切云团产生于梅雨锋云系的尾部与西南季风交汇处。另外,分析了云团云顶温度与降水的关系,发现产生≥5mm/h 降水的云团,其中75%的云团云顶温度小于或等于-64℃。According to the analysis of the GMS digital stretched cloud image and conventionalprecipitation data,it shows that storm and heavy rainfall in the Changjiang-Huaihe Riv-er valley during the Mei-yu period of 1991 is mainly produced by mesoscale cloud clus-ters.They are:vortex-warm front shear cloud clusters and cold front shear cloud clus-ters.Most of them are meso-β scale cloud clustets.The mean life time is 5—6 hours andthe mean minium cloud top temperature is—69℃.It is seen that the vortex-warm frontshear cloud clusters are created on the eastern side of the vortex center and in the leftfront of low level jet axis,while the cold front cloud clusters are located in the conflu-ence site of the rear of Mei-yu front cloud system with the southwest monsoon.In addition,the relationship between cloud cluster top temperature and precipita-tion are estimated.It is found that the top temperature of 75% of cloud cluster withrainfall of 5mm/h and over is—64℃ or down.

关 键 词：中尺度 云团 低涡暖切 温度 梅雨锋 

分 类 号：P426.5[天文地球—大气科学及气象学]