2014年赤峰市区两次重污染天气过程对比分析

Compartion and Analysis on Two Heavy Pollution Weather Process of Chifeng in 2014

文章利用中国环境保护部的空气质量小时监测资料,及相关的气象观测资料就2015年2月份接连出现在赤峰市区两次重污染过程进行深入的对比分析。结果表明:每次污染过程的发生都与天气背景密切相关,第一次重污染天气是由于较强的海平面高压导致大气垂直层结稳定,加上地形的影响,不利于本地污染物的扩散,使得空气污染物浓度增大,污染物主要是以烟以及雾霾为主;第二次重污染天气是因为高空强冷空气加上地面高压前部较大的气压梯度形成强偏北风,引导北部的沙尘南下形成了重污染天气,污染物主要以沙尘为主。

Based on hours data of air quality of China＇s ministry of environmental protection, and related meteorological data about two heavy pollution process was happened in February 2015 in Chifeng city, come to the conclusion that every pollution process was closely related to the weather background,the first heavy pollution weather is due to that the strong stable sea level pressure leads to stratification of atmospheric vertical, and the influence of terrain, is not conducive to the diffusion of the pollutants, lead to increases of air pollutant concentration, and the smoke and fog are main pollutants; the second heavy pollution weather because of strong cold air and pressure gradient in front of the ground pressure formed strong northerly winds, lead to heavy pollution process.