一次西南低涡发生发展的中尺度诊断  

MESOSCALE ANALYSIS ON THE FORMATION AND DEVELOPMENT OF SOUTHWEST VORTEX DURING 8～10 JULY 1989

作　　者：邹波[1] 陈忠明[2] 

机构地区：[1]中国民航飞行学院航行系,四川省广汉市618307 [2]四川省气象科学研究所,四川省成都市610072

出　　处：《高原气象》2000年第2期141-149,共9页Plateau Meteorology

基　　金：四川青年科技基金;北大暴雨实验室资助

摘　　要：采用常规和非常规观测资料 ,对一次西南低涡发生、发展过程进行了初步诊断分析 ,结果表明 :( 1 )与自由大气中低涡环流的变化相比 ,边界层内低涡环流的演变表现出非连续性特征 ,且涡区内的对流发展和降水也与此相一致。 ( 2 )大气边界层顶的非平衡动力强迫及 50 0hPa正涡度平流的动力作用对本例低涡的形成和发展有重要贡献。By using conventional and non conventional observation data, a preliminary study on the formation and development of southwest vortex during 8～10 July 1989 is made. The results show that the circulation evolution of the southwest vortex in PBL displays discontinuity feature in comparision with the case in free atmosphere, but the convection and precipitation in the region of southwest vortex show same feature too and the important factors that affect formation and development of this southwest vortex are the dynamical force of unbalance fields on PBL top and positive vorticity advection on 500 hPa.

关 键 词：西南低涡 中尺度分析 非平衡强迫 低涡环流 大气 

分 类 号：P433[天文地球—大气科学及气象学] P458.121.1