摘要
本文对2015年1月10-13日和2016年3月17-20日两次空气污染过程进行了对比分析,结果表明,污染过程中,高空基本为偏西气流控制,中低空受偏南气流影响,地面等压线稀疏,风速较小;污染浓度与能见度呈负相关,且污染时段出现了霾、轻雾或扬沙;低层存在逆温层,有暖平流,高低空处于下沉气流区,不利于污染物垂直方向的扩散。
Two continuous pollution events on January 10 to 13 and on March 17 to 20 in Wuhai were compared.The results show that at the high level there is westerly fow,while the lower level is southly fow.At the surface, isobars is thin and the wind speed is small. The pollution concentration and visibility are negatively correlated, and the pollution during the haze and mist or fying sand.There is inversion layer and warm advection in lower level.The circulation feld is narrow decending current,and go against pollutant dispersion in vertical direction.
出处
《环境与发展》
2017年第9期42-43,共2页
Environment & Development
关键词
空气污染
偏西气流
逆温
雾霾
Air pollution
Westerly fow
Inversion layer
Fog and haze
