摘要
利用NCEP/NCAR北半球逐日再分析和T213实况要素场资料,对宁夏2次秋季连阴雨过程(2007-09-25—10-09)和(2008-09-21—09-27)的环流形势、热力学特征和水汽条件等进行了对比分析.结果表明,2次过程持续时间、明显降水落区、降水强度不同;但在副热带高压位置,远距离台风间接影响及200hPa风矢量场分布等方面有相似之处.在500hPa距平场上,亚洲中纬度地区均处于"东高西低"环流型下,有利于包括宁夏在内的西北地区东部发生阴雨天气.T213,EC数值预报产品对预报宁夏连阴雨天气过程具有较好的指示意义.
With daily reanalyzed data of NCEP/NCAR in the Northern Hemisphere and observed data of different element of T213, twice continuous rain which happened on 2007.9.25-10.9 and 2008.9.21-9.27 in Ningxia were described by analyzing circumfluence position, thermodynamics character and hydrosphere. The result showed that, although the maintained time, obvious area and intensity of the twice precipitation were different, but location of subtropical high, indirect effect of the typhoon far away and the distribution of wind at 200 hPa were similar. It is also found that was benefit to the happening of continuous rain of the east in the North and West of China including Ningxia and the widely area of high and mid-latitude of Asia under the circurnfluence of ＂anticyclone at east and depression at west＂ at 500 hPa average high on departure field. Additionally, it also claimed forecast of T213 and EC had a good significance of continuous rain in Ningxia
出处
《宁夏工程技术》
CAS
2009年第3期201-207,共7页
Ningxia Engineering Technology
基金
宁夏自然科学"宁夏区域内风能资源时空变化特征分析"基金资助项目(NZ08157)
关键词
宁夏
秋季连阴雨
对比分析
数值预报产品检验
应用分析
Ningxia
continuous rain in autumn
comparative analysis
numerical weather prediction products inspection
application analysis
