银川市区及宁东能源基地早晚逆温变化及其对大气污染影响研究  

Changes of morning and evening atmospheric temperature inversion and its impact on air pollution in Ningdong Energy Base and urban area of Yinchuan city

作　　者：崔洋 常倬林[1,3] 王天河[4] 缑晓辉 张智[1,2] CUI Yang;CHANG Zhuolin;WANG Tianhe;GOU Xiaohui;ZHANG Zhi(Key Laboratory of Characteristic Agric-meteorological Disaster Monitoring,Forecasting and Risk Management in Arid Regions,CMA,Yinchuan 750002;Key Laboratory of Meteorological Disaster Prevention and Mitigation in Ningxia Province,Yinchuan 750002;Ningxia Meteorological Disaster Prevention Technology Center,Yinchuan750002;College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]中国气象局旱区特色农业气象灾害监测预警与风险管理重点实验室,银川750002 [2]宁夏气象防灾减灾重点实验室,银川750002 [3]宁夏气象灾害防御技术中心,银川750002 [4]兰州大学大气科学学院,兰州730000

出　　处：《干旱区资源与环境》2022年第8期84-91,共8页Journal of Arid Land Resources and Environment

基　　金：宁夏自然科学基金项目(2022AAC05065,2019AAC03252);宁夏回族自治区重点研发计划项目(2018BEG03067);宁夏自治区青年拔尖人才培养专项(RQ0022;RQ0023)资助。

摘　　要：利用2015年1月1日~2020年12月31日逐日气象、大气环境站点观测数据,分析研究了银川早晚大气逆温变化特征,及其对不同季节、污染等级大气污染的影响。结果表明:银川逆温厚度早晨比傍晚厚,逆温强度早晨比傍晚弱。春秋冬日出现超厚弱逆温时,银川大气AQI较高,会出现持续性污染天气。春季早晚逆温对银川大气NO_(2)浓度影响最大;夏季早晚超厚逆温会造成大气SO_(2)、NO_(2)污染加重,宁东能源基地O_(3)浓度和市区AQI升高。秋季逆温对银川大气污染影响最大,早晚逆温会造成大气污染物快速积累,是秋季空气污染频发的主要原因。冬季早晚接地逆温会造成银川NO_(2)、PM_(2.5)浓度持续升高,进而导致PM_(2.5)为主污染天气的发生。日逆温越厚、强度越弱、起始高度越低,银川市区轻中度污染大气AQI越大、污染维持时间越长。早晚逆温对银川大气污染的影响随着污染等级加重而减弱。早晚逆温会造成轻度污染中SO_(2)、NO_(2)和PM_(2.5)浓度持续升高,中度污染中NO_(2)、PM_(2.5)积累加快,重度以上污染中SO_(2)污染加重,进而导致空气质量恶化。The variation characteristics of morning and evening atmospheric temperature inversion in Yinchuan were analyzed with the daily sounding observation data and air quality observation data from January 1 st,2015 to December 31 st,2020.Then,their impacts on air pollution in the different seasons and pollution levels were discussed through meteorological statistical analysis and diagnostic methods.The results showed that the boundary layer temperature inversion thickness in Yinchuan was thicker in the morning than in the evening,its intensity was weaker in the morning than in the evening.When there were super-thick and weak temperature inversions in spring,autumn and winter,the atmospheric AQI in Yinchuan was high,there would be continuous pollution weather.In Yinchuan,the morning and evening temperature inversion had the greatest impact on NO_(2) concentration in spring;the super-thick temperature inversion occurred in morning and evening in summer led to the accumulation of SO_(2) and NO_(2),and the increasing of O_(3) concentration in Ningdong Energy Base and AQI in the urban area.The temperature inversion in autumn had the greatest impact on the air pollution processes in Yinchuan,which caused the rapid accumulation of air pollutants.It was also the main reason for the frequent occurrence of air pollution in autumn.The morning and evening ground temperature inversion in winter caused the increasing of NO_(2) and PM_(2.5) concentration continued to rise,further led to the polluted weather mainly with PM_(2.5).The thicker and weaker the daily temperature inversion were,the lower the initial height of temperature inversion was,the greater AQI and the longer polluting duration the mild and moderate pollution would be in Yinchuan.The effect of morning and evening temperature inversion on air pollution decreased with the increase of pollution level in Yinchuan.The morning and evening temperature inversion caused the concentration of SO_(2),NO_(2) and PM_(2.5) to rise continuously in mild pollution,the concentration of

关 键 词：早晚大气逆温 污染物浓度 空气质量 银川市区 宁东能源基地 

分 类 号：X51[环境科学与工程—环境工程]