太原市2019年典型大气重污染过程分析

Analysis of typical heavy pollution process in Taiyuan in 2019

对2019年12月6日至9日太原市典型重污染过程进行了分析。结果表明,此次污染过程在空间分布上呈现“两头重,中间轻”的污染形势,南部区域污染程度总体重于北部区域;本次污染过程主要受逆温、静稳、高湿等区域持续不利气象条件影响,加速了颗粒物的二次转化和吸湿增长。整个污染过程中PM_(2.5)的主要来源是二次无机源、燃煤源和机动车尾气源。

This article analyzes the typical heavy pollution process in Taiyuan from December 6th to 9th in 2019.The results show that this pollution process was“heavy at both ends and light at the middle”.The pollution level in the south was generally heavier than that in the north.This pollution process was mainly affected by continuous adverse weather conditions such as temperature inversion,static weather,and high humidity,which promoted the secondary transformation of particulate matter and the growth of moisture absorption.The main sources of PM_(2.5)in this pollution prrocess were secondary inorganic sources,coal-burning sources and vehicle exhaust sources.