初冬一次连续雾的天气要素特征和污染状况分析

在吉林地区的天气学资料和物理量的基础上,结合发生在2007年11月7~9日持续3 d的大雾天气,从天气学形势、要素特征特别是大雾发生、维持、消散的天气学条件出发,并结合环保局空气污染监测数据,对大雾天气的空气质量进行了分析。结果表明:大雾发生前期,低空有弱冷空气活动,大雾维持期间北部维持高脊使得没有强冷空气入侵,850 hPa以下有深厚的逆温层存在,近地面层逆温持续存在,且低空风速较小,相对湿度大,500~850 hPa有弱的冷平流;由于稳定的逆温层结存在,不利于污染物的扩散,大雾天气里空气污染指数为三级,空气质量为轻度污染。

Analysis of Weather Element Characteristics and Air Pollution Status during Continuous Fog Days in Early Winter

A continuous fog,which occurred from Nov 7th to Nov 9th in 2007 in Jilin,was considerably described and summarized by analyzing the synoptic data and physics values from weather status,element characteristics,specially by studying the respective synoptic conditions while the fog occurred,then maintained,and at last disappeared.Combined with the pollutant observation data from Jilin Environmental Bureau,the air qualities corresponding to the fog days were investigated.The result showed that weak cold air mov...