山地对流云并合形成积层混合云的过程分析  

Convective clouds merger into convective and stratiform mixed clouds in mountainous area

作　　者：李艳伟[1] 牛生杰[1] 罗宁[2] 文继芬[2] 黄浩隽[2] 

机构地区：[1]南京信息工程大学大气物理与大气环境重点实验室,南京210044 [2]贵州省人工影响天气办公室,贵阳550002

出　　处：《气象科学》2009年第2期157-164,共8页Journal of the Meteorological Sciences

基　　金：国家科技支撑计划混合云人工增雨技术研究(2006BAC12B02);南京信息工程大学科研基金(Y654)

摘　　要：本文利用贵阳市气象台2005和2006年5—9月的地面、高空观测和雷达资料等,分析了41次山地对流云并合形成积层混合云的降水过程。研究发现如果分散的多单体对流云若距离较近,则很可能出现大范围地跨接、合并,则有可能形成范围宽广的片状或带状云系,即积层混合云系。云系形成以后在移动的过程中,会将前方不断新生的对流单体合并,从而云系前缘强度增强,云系不断维持。整个系统的生命期往往较分散云团更长,并有可能会形成间歇性或连续性降水。本文分析了山地对流云并合形成积层混合云的一些具体特征。Using coordinated datasets of surface, radiosondes and radar of Guizhou province from May to September during 2005 and 2006, 41 processes of convective clouds which mergered into convectire and stratiform precipitation systems are studied. If the distance of convective clouds is near, the clouds tend to merge and lead to convective and stratiform mixed clouds systems. In the moving process of cloud system, new convective cells ahead are merged by cloud system, and then the system will be enhanced and maintained, so the cloud system can bring strong precipitation. Some physical characteristics during mergering process are summed up on the basis of the observing data.

关 键 词：山地对流云 积层混合云 物理特征 并合 

分 类 号：P426.51[天文地球—大气科学及气象学]