大气与环境光学学报2025，Vol.20Issue(5)：571-581,11.DOI:10.3969/j.issn.1673-6141.2025.05.002
北京市区气溶胶光学厚度特征及其与空气质量等级的关系研究
Aerosol optical depth characteristics and its relationship with air quality grades in Beijing urban area
摘要
Abstract
Using the aerosol optical depth(AOD)data of five observation stations located in Beijing,China,urban area and the air quality grades data in the region from January to December 2021,the quantitative relationship between AOD and air quality grades was studied,and the evolution characteristics of different types of aerosol particles,including black carbon(BC),urban-industrial aerosols(UI),desert dust(DD),and mixed aerosols(MT)under different air quality grades were analyzed.The results show that:(1)In 2021,the air quanlity in the urban area of Beijing was predominantly classified as moderate(50.7%)and light pollution(21.9%),the monthly variations in AOD exhibited a significant correlation with changes in air quality grades,the months with poor air quality including March,July and August,corresponded to the monthly peak and sub-peak values of AOD.(2)In the order of air quality from good to heavily polluted grades,the average AOD values for the five sites were 0.10,0.51,0.68,0.87,and 1.23,respectively.(3)The dominant aerosol particle types varied with different air quality grades.In general,under good air conditions,the majority of days were dominated by BC,accounting for over 80%,and the remaining days were dominated by MT.As the air pollution increased,the proportions of days dominated by UI,DD,and MT increased,while the proportion of days dominated by BC decreased.Under lightly polluted level,the proportion of days dominated by MT was the highest,while under the heavily polluted level,the proportion of days dominated by DD was the highest.关键词
太阳光度计/气溶胶光学厚度/空气质量等级/气溶胶粒子种类Key words
solar radiometers/aerosol optical depth/air quality grades/aerosol particle types分类
资源环境引用本文复制引用
杨世莉,李林,孟磊,夏芸洁..北京市区气溶胶光学厚度特征及其与空气质量等级的关系研究[J].大气与环境光学学报,2025,20(5):571-581,11.基金项目
国家自然科学基金面上项目(42075044),国家自然科学基金青年项目(42205124) （42075044）
