甘南高原一次突发性强对流天气的诊断分析  

Diagnostic Analysis of an Abrupt Severe Convective Storm Occured on Gannan Plateau

作　　者：王建兵 王振国 李晓媛 汪治桂 张胜智 

机构地区：[1]甘肃省甘南州气象局,甘肃合作747000

出　　处：《干旱气象》2007年第3期54-60,共7页Journal of Arid Meteorology

基　　金：甘肃省气象局"西北地区防雹消雹技术在甘南州冰雹;雷暴短时临近预报预警中的应用推广研究(2007-07)"课题资助

摘　　要：对发生在甘南高原的一次突发性强对流天气的诊断分析发现：高原上对流云团发展东移与本地发展的对流云团合并加强是造成这次强对流天气的主要原因;强雷雨和冰雹出现的位置在对流云团的右前侧;600-700 hPa上高原东部偏东气流的发展对这次强对流天气的发生、发展有重要作用;700 hPasθe高能中心、Δθse（500-700）不稳定区分布、700 hPa螺旋度及700 hPa水汽通量散度的分布对这次强对流天气的落区有很好的指示意义。An abrupt severe storm occurred on August 30-31 of 2006 in the Gannan Plateau was analyzed.Results show that the combination of convective clouds from the southeast of Qinghai and the local convective cloud is main cause resulting in this process,and the severe storm and hail occurred on the front of right side of the convective cloud.The development of airflow leaning east at the height of 600-700 hPa over the eastern part of Gannan plateau is very important to the severe storm＇s occurring and developing.The distributions of θse high energy center at 700 hPa level,θse departure between 500 hPa and 700 hPa,the helicity and vapor flux divergency fields at 700 hPa level are meaningful to estimate the occurring region of this severe storm.

关 键 词：强对流天气 成因 诊断分析 

分 类 号：P458.121.1[天文地球—大气科学及气象学]