鲁西南霾天气个例分析

Analysis of a Haze Event in Southwestern Shandong Province

2007年6月11～13日鲁西南连续3天出现罕见的霾天气过程，为了弄清楚这次霾天气过程形成的天气学原因，利用常规气象资料、探空站资料及自动气象站资料和空气污染资料对这次过程进行综合分析。结果表明，覆的形成是多种气象因素共同作用的结果，大陆暖高压东移入海，其底部的偏东气流将海上的低温高湿空气向鲁西南输送，是霾形成的有利环流条件；中低层风速较小，且风向随高度逆转，是霾形成的有利风场；大气层结稳定，且低层存在逆温层是霾形成的重要条件；高污染浓度是形成霾的物质基础。

Based on the conventional data, sounding data, AMS （Automatic Meteorological Station） data and air quality data, a haze event happened in the southwestern Shandong Province in June 2007 is analyzed. The results show that the formation of the haze is related to various meteorological factors. The warm continental high pressure moved eastwards into the sea, and the low-temperature and high-humidity air was transported to Heze by the easterly airflow at its bottom, which were beneficial to the formation of the haze. The wind speed at the mid-low level was small, and the wind direction was reverse with altitude, in which the wind field was also beneficial to the formation of the haze. The stable atmospheric stratification and inversion layer existed at lower levels are important factors to the formation of the haze, and the high concentration of pollutants is also the base of the haze.