摘要
为确定降水对吴忠市空气质量的影响和对空气中污染物的湿清除作用,利用吴忠市2015—2018年逐日、逐小时气象观测资料和空气质量监测资料,对比分析不同降水条件下空气质量状况和各种空气污染物浓度的变化特征,研究降水对不同浓度污染物的清除作用。结果表明,降水有利于空气质量的提升,且降水量越大,空气质量为优的频率越大;有降水时空气污染物低浓度出现的频率比高浓度出现的频率大,无降水时则相反;降水对PM10的清除效果最好,其次是PM2.5和SO2,清除效果最差的是NO2和CO;降水量越大,对PM2.5、PM10和SO2的清除作用越明显,对CO则相反;PM2.5、PM10、SO2和NO2的质量浓度越高,降水的清除作用越明显,而CO的质量浓度为1~2 mg/m3时,降水的清除作用才能凸显。该研究为降水影响下的空气污染气象条件预报提供一定的技术支持,同时也为公众防护和政府对大气污染的治理提供参考依据。
In order to study the impact of precipitation on the air quality and air pollutants,the daily and hourly weather observation data and air quality data of Wuzhong from 2015 to 2018 are used.The air quality and the characteristics of various air pollutants under different precipitation conditions are analyzed.The effect of precipitation on pollutants with different concentrations is studied.The results show that precipitation is conducive to the improvement of air quality,and the amount of precipitation is related to the air quality.The occurrence of low concentrations of air pollutants is more possible than that of high concentrations when there is precipitation,and it is opposite when there is no precipitation.Among the removal effects of precipitation on various pollutants,the best removal effect is on PM10,PM2.5 and SO2 followed,and the worst removal effect are on NO2 and CO.With greater amount of precipitation,the removal effect is better on PM2.5,PM10 and SO2,with the opposite effect on CO.With higher concentration of PM2.5,PM10,SO2 and NO2,the removal effect is better.But the precipitation removal effect is prominent when CO concentration is 1—2 mg/m3.This study provides some technical support for air pollution forecasting under the influence of precipitation,and also provides a reference for public protection and government’s control of air pollution.
作者
魏月娥
边彦铭
倪丽霞
贾乐
WEI Yuee;BIAN Yanming;NI Lixia;JIA Le(Key Laboratory for Meteorological Disaster Monitoring and Early Waring and Risk Management of Characteristic Agriculture in Arid Regions,China Meteorological Administration,Yinchuan 750002,China;Wuzhong Meteorological Office,Wuzhong 751100,China;Wuzhong Middle School,Wuzhong 751100,China)
出处
《宁夏工程技术》
CAS
2020年第3期217-222,共6页
Ningxia Engineering Technology
基金
宁夏回族自治区吴忠市气象局一般性项目“降水对吴忠市区空气质量影响分析”。
关键词
降水
空气质量
污染物
湿清除
precipitation
air quality
air pollutants
wet scavenging
