闽西北地区降水天气系统特征分析  

Characteristic analysis of precipitation weather systems in northwest Fujian

作　　者：林长城[1] 蔡义勇[1] 王宏[1] 隋平[1] 陈彬彬[1] 陈秋萍[2] 

机构地区：[1]福建省气象科学研究所,福建福州350001 [2]福建省气象台,福建福州350001

出　　处：《自然灾害学报》2009年第4期145-149,共5页Journal of Natural Disasters

基　　金：2005年福建省气象局科研课题;福建省科技厅重点项目(2008Y0027);福建省气象科学研究所科研基金项目

摘　　要：利用2003-2007年闽西北地区的常规气象资料和探空资料,对影响当地降水的主要天气系统及其特征进行了分析。结果表明,低涡切变为闽西北地区的主要降水系统,其次为大陆高压底部和暖区辐合;10类天气系统的各个等级降水的分布差异明显,低压倒槽控制下局部出现暴雨的机会最大;低涡切变的南部影响闽西北地区的机会最多,其系统的南部、中部和北部是较适合当地开展人工增雨作业的部位;春季低涡切变控制时暴雨出现率高,进行人工增雨作业时要慎重;闽西北地区的0℃层高度平均低于4200m,逐月呈单峰型分布,1月份最低,7月份最高。Based on the routine meteorologic data and air sounding data from 2003 to 2007 in Northwest Fujian, the characteristics of the leading weather systems influencing on local precipitation were analyzed. The result shows that, low-vortex shear is the chief precipitation weather system in Northwest Fujian, and then are continental - high base and warm sector convergence. There are visible differences in the precipitation distribution of each grade for the 10 kinds of weather systems. The opportunity of storm rain is largest when the weather is controlled by low - pressure inverted trough. Northwest Fujian is affected most by the southern part of low - vortex shear, of which the southern, middle and northern parts are the positions relatively suitable for local artificial precipitation operation. The occurrence rate of storm rain is great when the weather is controlled by low - vortex shear in spring, so it should be circumspect when carrying out artificial precipitation operation. The height of 0℃ layer is below 4200 meter on average, and the monthly distribution changes as unimodal shape, for which January is the lowest while July the highest.

关 键 词：闽西北地区 天气系统 人工增雨 

分 类 号：P481[天文地球—大气科学及气象学]