武汉市冬季典型重污染过程的污染特征和来源解析

Analysis of the characteristics and sources of a typical heavy air pollution process in winter in Wuhan

2018年1月我国中部及东部地区多个省份出现持续多天的重污染天气.本研究综合分析了2018年1月18—22日武汉市发生的一次重污染过程的气象条件、污染特征及成因.监测数据显示,在此次PM2. 5重污染过程中,武汉市城区PM2. 5小时均值超过150μg/m3.污染期间PM_(2. 5)以0. 5μm以下粒子变化为主,除了不利的天气形势外,机动车、燃煤是造成重污染的重要原因,北部的河南省、东北部的安徽省以及湖北省黄冈市等省市的污染输送加重了武汉的污染程度.

During January of 2018,heavy air pollution episodes occmTed in central and eastern China.This study comprehensively analyzed the meteorological conditions, characteristics, and foxanation causes of a heavy air pollution episode during January 18-22,2018.The l^sults showed that the hourly averaged concentration of P M25 was greater than 150 μg/ms in Wuhan. The main change in PM25 was for particles less than 0.5 μm during the pollution process ,winds.In addition to adverse weather conditions, motor vehicle and coal emissions were the most important causes of heavy air pollution, and regional transport from Henan, Anhui, Huanggang, and other cities affected Wuhan significantly.