摘要
乌鲁木齐市作为天山北坡城市群重点首府城市,空气质量虽逐年改善,但改善幅度不大,大气污染防治工作任重道远。基于乌鲁木齐市2021年10个监测站点逐日污染物浓度数据,对大气污染的时空变化特征及气象影响因素进行分析探讨。结果表明:O3、PM_(10)和PM_(2.5)有显著的季节变化特征,PM_(10)和PM_(2.5)浓度夏季低、冬季高;O_(3)在夏季浓度较高,冬季浓度较低。米东区处于PM_(2.5)和PM_(10)等大气污染物高浓度分布区。降水越大对PM_(2.5)和PM_(10)的清除作用越强,PM_(2.5)浓度随着风速增大呈降低趋势;特别是风速在>5 m/s时,污染物降低的幅度最大。
As the key capital city of the city cluster on the northern slope of Tianshan,Urumqi's air quality had been improving year by year,but the improvement was not significant.There was a long way to go in the prevention and control of air pollution.Based on the daily pollutant concentration data of 10 monitoring stations in Urumqi City in 2021,the temporal and spatial characteristics and meteorological influencing factors of air pollution were analyzed and discussed.The results showed that O_(3),PM_(10),and PM_(2.5) had significant seasonal variation characteristics.PM_(10) and PM_(2.5) concentrations were low in summer and high in winter,while O3 concentrations were higher in summer and lower in winter.Midong District was located in a high concentration distribution area of atmospheric pollutants such as PM_(2.5) and PM_(10).The greater the precipitation,the stronger the scavenging had effect on PM_(2.5) and PM_(10),and the concentration of PM_(2.5) decreased with the increase of wind speed.Especially when the wind speed was>5 m/s,the maximum reduction in pollutants occurs.
作者
何静
赵志刚
蔺尾燕
祝婕
常梦迪
藏晓芳
赵强
HE Jing;ZHAO Zhigang;LIN Weiyan;ZHU Jie;CHANG Mengdi;ZANG Xiaofang;ZHAO Qiang(Xinjiang Academy of Environmental Protection Science,Urumqi Xinjiang 830011,China;Xinjiang Key Laboratory for Environmental Pollution Monitoring and Risk Warning,Urumqi Xinjiang 830011,China;Xinjiang Engineering Technology Research Center for Cleaner Production,Urumqi Xinjiang 830011,China;Junggar Desert-oasis Ecotone Station for Scientific Observation and Research of National Environmental Protection,Urumqi Xinjiang 830011,China)
出处
《新疆环境保护》
2023年第2期9-15,共7页
Environmental Protection of Xinjiang
基金
自治区大气污染防治专项“重点行业错峰生产研究”
自治区重点研发计划项目(2022B03029-1)。
关键词
大气污染
时空分布
空气质量
乌鲁木齐市
air pollution
space and temporal distribution
air quality
Urumqi
