沿祁连山两次典型强降水天气个例对比分析  

Contrast Analysis of Two Typical Heavy Precipitation Weather Cases along Qilian Mountain

作　　者：殷雪莲[1,2] 郭建华 董安祥[1] 陈和平 曹玲 刘秀兰 

机构地区：[1]中国气象局兰州干旱气象研究所,中国气象局干旱气候变化与减灾重点开放实验室,甘肃省干旱气候变化与减灾重点实验室,甘肃兰州730020 [2]甘肃省张掖市气象局,甘肃张掖734000 [3]甘肃省临泽县气象站,甘肃临泽734200

出　　处：《高原气象》2008年第1期184-192,共9页Plateau Meteorology

基　　金：西部开发科技行动重大项目“祁连山空中云水资源开发利用研究”(2004BA901A16)子课题“祁连山区地形云形成过程和催化作用试验研究”;国家自然科学基金项目“典型内陆河区域河西走廊地区降水规律的研究”(40475031)共同资助

摘　　要：采用天气学及动力学方法,对沿祁连山两次典型的区域性大—暴雨天气从环流背景、中小尺度天气系统、动力机制以及地形特征、增雨过程等方面进行了对比分析,找出了两次过程的相似点与不同之处,结果表明:"东高西低"切变辐合、低空急流及相对稳定的环流形势是沿祁连山区域性强降水产生的关键,特殊的地形地貌及人工增雨作业为增加祁连山区降水量提供了有利条件。Using the synoptic meteorology and dynamics methods, the circulation background, mcroand small-scale weather systems, dynamic mechanisms and orographic features, as well as artificial precipitation stimulation of two typical region heavy-rainstorm weathers along Qilian Mountain were compared and analyzed. It is found that there are similar and different at two rainstorm processes, namely, shear convergence, low-level jet, and relative and stable circulation situation are a key of regional rainstorm occurring along Qilian Mountain, the special orography and geomorphology, artificial precipitation stimulation provided the favorable conditions for increasing precipitation of Qilian Mountain region.

关 键 词：祁连山区 强降水 人工增雨 

分 类 号：P426.6[天文地球—大气科学及气象学]