基于多源数据的四川盆地大气污染过程的气溶胶演变特征分析  

Aerosol Evolution Characteristics of Air Pollution Processes in Sichuan Basin Based on Multi-source Data

作　　者：李晓敏 王晨曦 晏惠芬[3] 王一文 耿蔚 LI Xiao-min;WANG Chen-xi;YAN Hui-fen;WANG Yi-wen;GENG Wei(Sichuan Meteorological Disaster Prevention Technology Center,Chengdu 610072,China;Innovation Team of Southwest Regional Meteorological Center,China Meteorological Administration,Chengdu 610072,China;Xichang Meteorological Station of Sichuan Liangzhou Meteorological Bureau,Xichang,Sichuan 615000,China;Liaoning Meteorological Disaster Monitoring&Early Warning Centre,Shenyang 110166,China;The Jint Research Center for Weather Modification of China Meteorological Adminstration&Chengdu University of Information Technology,Chengdu 610225,China)

机构地区：[1]四川省气象灾害防御技术中心,成都610072 [2]中国气象局西南区域气象中心创新团队,成都610072 [3]四川省凉山彝族自治州气象局西昌气象站,四川西昌615000 [4]辽宁省气象灾害监测预警中心,沈阳110166 [5]中国气象局-成都信息工程大学人工影响天气联合研究中心,成都610225

出　　处：《四川环境》2023年第2期92-100,共9页Sichuan Environment

基　　金：高原与盆地暴雨旱涝灾害四川省重点实验室2020年度科技发展基金项目(SCQXKJQN2020046);中国气象局西南区域气象中心创新团队建设项目(XNQYCXTD-202203);中国气象局-成都信息工程大学人工影响天气联合研究中心开放课题(2022GDRY005)。

摘　　要：为了研究H8卫星AOD数据表征四川盆地的颗粒物浓度可靠性,并在此基础上探究大气污染过程的AOD分布规律和原因,为秋冬季的大气污染防控提供支撑。研究基于包括葵花-8(Himawari-8,H-8)卫星气溶胶光学厚度(Aerosol Optical Depth, AOD)产品结合探空数据、环保国控站点的污染浓度的多源数据,利用归一化和相关性分析等方法,对2021年2月1~6日四川盆地典型大气污染过程的污染物进行时空分布特征及其气象条件和边界层特征分析,结果表明:(1)该过程的AOD与首要污染物PM_(2.5)时空演变规律基本一致,相关性达0.9139,呈现2月1~4日盆地区域内污染增强而2月5~6日减弱的趋势。(2)污染过程期间为静稳天气形势,盆地位于地面高压前部;后期受高空槽过境影响,污染逐步消散。(3)气象条件分析中,温度、风速与AOD呈现负相关;而相对湿度为正相关。并且温江、达州、宜宾探空站显示边界层条件基本为静风或小风天气,并多次出现逆温。研究结果表明AOD对主要污染物具有较好指示作用,并且为我省打赢蓝天保卫战、走绿色发展之路提供科学依据。In order to study the reliability of particle concentration represented by Aerosol Optical Depth(AOD)data of H8 satellite in Sichuan Basin,and explore the AOD distribution and causes of the air pollution process,so as to provide support for the prevention and control of air pollution in autumn and winter.Based on a variety of data including the Himawari-8 satellite AOD L3 data,sounding data,and pollution concentration data from environmental protection national control sites,the temporal and spatial distribution characteristics of AOD in Sichuan Basin during February 1 to 6,2021 were analyzed.And the boundary layer diffusion conditions of the pollution process were analyzed based on the sounding data.The results showed that:1)The temporal and spatial evolution of the AOD and PM_(2.5) in this process are basically the same and the correlation coefficients is 0.9139.And the pollution intensity and area in the basin area increased from February 1-4,and decreased from February 5-6.2)During the pollution process,the basin is located in front of the surface high pressure.In the later period,the pollution gradually dissipated due to the influence of the upper trough transit.3)In the analysis of meteorological conditions,temperature and wind speed were negatively correlated with AOD,while the relative humidity was positively correlated.The sounding stations at Wenjiang,Dazhou,and Yibin showed that the boundary layer conditions were basically quiet or light wind weather,and temperatureinversions occurred many times during the pollution process.The results showed that AOD has a belter indicator effect on main pollutants,and provides scientific basis for our province to win the blue sky batde and take the road of green development.

关 键 词：四川盆地 气溶胶 葵花-8 气象条件与边界层特征 

分 类 号：X513[环境科学与工程—环境工程]