郑州市大雾气候特点及一次个例分析  

Climatic Characteristics and a Case Analysis of Heavy Fog in Zhengzhou

作　　者：谷秀杰 王友贺 张永涛[2] 邵振平 高媛媛 

机构地区：[1]河南省气象台,郑州450003 [2]河南省气象局监测网络处,郑州450003 [3]河南省人工影响天气办公室,郑州450003

出　　处：《气象与环境科学》2009年第4期40-43,共4页Meteorological and Environmental Sciences

摘　　要：为了了解近20 a郑州市大雾的时空变化特征,根据1980-2005年郑州市大雾观测记录,统计分析了这一时期郑州市大雾的变化特点及产生大雾时的气象要素特征;并利用河南省地面和探空观测资料以及NCEP1°×1°再分析资料,从要素场、大气稳定度等方面,对2007年12月25-27日郑州市大雾形成原因进行了分析。结果表明:郑州市年雾日数呈下降趋势,每月都可以出现大雾,但12月最多,6月最少。降水后较大的相对湿度、稳定的大气层结以及近地层较小风速等是大雾形成的必要条件。In order to find out the temporal and spatial variation characteristics of heavy fog in recent 20 years in Zhengzhou, the heavy fog variation characteristics and the meteorological factor characteristics when heavy fog occurred are statistically analyzed on the basis of the heave fog observational data from 1980 to 2005 in Zhengzhou. By using the surface and sounding observational data and NCEP 1°×1° reanalysis data, the formation reason is analyzed for the heavy fog that formed on December 25--27 in Henan from meteorological elements field and atmospheric stability aspects. The results show that the heavy fog days decrease continuously and that it can appear in every month but the most in December and the least in June. The necessary conditions for the formation of heavy fog are the biggish relative humidity after precipitation, the steady atmospheric stratification and smaller wind speed.

关 键 词：大雾 气候特征 个例分析 

分 类 号：P426.4[天文地球—大气科学及气象学]