摘要
为研究云贵高原城市合肥新冠期间大气污染物变化特征,利用2015—2020年合肥市空气质量监测数据、地面气象观测资料,分析新冠肺炎疫情防控期间合肥市主要大气污染物和气象要素的变化情况,研究空气质量对污染物减排和气象要素变化的响应。结果表明:疫情防控导致合肥市PM_(2.5)、PM_(10)和NO_(2)质量浓度明显下降,但O_(3)质量浓度小幅增加;PM_(2.5)和NO_(2)对人为减排的响应更敏感;防控期内合肥市气象条件比较有利于污染物的清除,防控减排措施导致PM_(2.5)质量浓度下降25.34%。在疫情防控的背景下,O_(3)浓度较2015—2019年明显偏高,PM_(2.5)显著下降,这与疫情防控期间人员车辆外出明显减少有关,导致夜间滴定消耗O_(3)的气体减少。减排措施对防控期间颗粒物污染浓度有明显的削弱作用。
In order to study the variation characteristics of air pollutants in Zunyi city of Yunnan Guizhou Plateau during the period of COVID-19 occurrence,the air quality monitoring data and surface meteorological observation of Zunyi from 2015 to 2020 were used to analyse the changes of Zunyi City main air pollutants and meteorological elements during the epidemic prevention and control period and study the response of air quality to pollutant emission reduction and meteorological factors.The results show that:epidemic prevention and control leads to the fact that the mass concentrations of PM_(2.5),PM_(10) and NO_(2) decreased significantly,but the mass concentration of O_(3) increased slightly;The response of PM_(2.5) and NO_(2) to human emission reduction was more sensitive.During the period of prevention and control,the meteorological conditions of Zunyi were conducive to the removal of pollutants.And the PM_(2.5) mass concentration decreased by 25.34%due to prevention and control measures.Under the background of epidemic prevention and control,O_(3) concentration was obviously higher and PM_(2.5) decreased significantly compared with 2015—2019,Which was related to the obvious reduction of people and vehicles going out during lockdown period,resulting in the reduction of gas consumption of O_(3) at night.Emission reduction measures have a significant weakening effect on the concentration of particulate matter pollution during the prevention and control period.
作者
尚媛媛
彭波
金凡琦
黄建菲
SHANG Yuanyuan;PENG Bo;JIN Fanqi;HUANG Jianfei(Guizhou Meteorological Service Center,Guiyang 550002,China;Guizhou Ecological Meteorology and Satellite Remote Sensing Center,Guiyang 550002,China)
出处
《中低纬山地气象》
2022年第3期91-95,共5页
Mid-low Latitude Mountain Meteorology
关键词
新冠疫情
气象要素
大气污染物
合肥市
COVID-19
meteorological elements
air pollutants
Zunyi City
