摘要
雨凇形成的基本条件是地面温度在０℃以下并有过冷雨滴降至地面，严重雨凇过程的特点即是上述条件维持时间长而且有较大的过冷雨滴降水。作者使用贵阳５６次探空和高空风资料，着重分析了贵州中部严重积冰过程的云内宏观热力、动力特征，发现云层厚度、云上部０℃以上暖层的存在以及云层中上部湍流强度等因子对过冷雨滴降水量有重大影响。同时，还分析了形成这种云层宏观特征的天气系统及大尺度环流背景。
he characteristics of a severe weather of glaze icing are of the long maintenance of time and of the supercooling rainfall.By using 56 sounding and upper-wind data,the macro thermal and dynamical characteristics of cloud layer over the central part of Guizhou plateau were analysed.It was found that the cloud depth,the existence of warm(T>0℃) layer and the turbulence intensity in mid-upper cloud layer have great influence on supercooling rainfall.The synoptic system and the large scale circulation conditions for long maintenance were also discussed.
出处
《气象》
CSCD
北大核心
1995年第5期48-52,共5页
Meteorological Monthly
基金
贵州省科委年度计划资助
关键词
雨凇
云层
动力不稳定性
环流背景
积冰过程
glaze icing
macro characteristic of cloud
dynamic instability
circulation background
