摘要
应用NCEP/NCAR北半球逐日再分析和T213分析场资料,对宁夏2009-09-04—09连阴雨天气进行了诊断分析,并从环流特征、水汽条件及动力和热力学特征等方面,与2007—2008年连阴雨过程进行了对比分析.结果表明,3次阴雨过程均发生在有利的环流背景下;冷空气的强弱和水汽来源的不同,造成了阴雨过程持续时间的不同;水汽通量散度、垂直速度和假相当位温分布的差异导致了阴雨过程降水特征的不同.
Diagnostic analysis of continuous rain in September 2009 in Ningxia has been studied by using NCEP/NCAR and T213 reanalyzed data. Contrastive analysis has been studied on continuous rain processes which happened in 2007--2008 from the hand of circumfluenee character, hydrosphere and thermodynamics character. Result shows that： three incidents happened under the beneficial circumfluence, the difference of duration of three process depended on the difference of cold air intension and vapor source, and the differences of vapor flux dispersion, vertical velocity and pseudo equivalent potential temperature conduce character dissimilarity of overcast and rainy process.
出处
《宁夏工程技术》
CAS
2011年第2期101-105,共5页
Ningxia Engineering Technology
关键词
宁夏
秋季连阴雨
天气诊断
对比分析
预报着眼点
Ningxia
continuous rain in autumn
diagnostic analysis
comparative analysis
forecast point
