滇南城市群环境空气污染特征及原因分析  

Analysis of the Characteristics and Causes of Air Pollution in the Urban Agglomeration of Southern Yunnan

作　　者：毕丽玫 万普娟 向峰 吕艳玲 刘炤寰 段学新 邱飞 BI Li-mei;WAN Pu-juan;XIANG Feng;LV Yan-ling;LIU Zhao-huan;DUAN Xue-xin;Qiu Fei(Yunnan Ecological Environment Monitoring Center,Kunming Yunnan 650034,China)

机构地区：[1]云南省生态环境监测中心,云南昆明650034 [2]中共临沧市委党校,云南临沧677000 [3]昆明市社会科学院,云南昆明650500

出　　处：《环境科学导刊》2025年第1期63-69,共7页Environmental Science Survey

摘　　要：滇南城市群是云南省环境空气污染的高发区,为厘清此区域环境空气质量状况及污染成因,对2021—2022年环境空气监测数据进行了分析。结果表明:滇南城市群大气环境质量总体保持优良,优良率在96.7%~100%,污染时段集中发生在3—4月,首要污染物为细颗粒物。研究期间,云南省滇南城市群及中南半岛国家气溶胶光学厚度时空分布规律与火点分布高度一致;后向轨迹分析表明,典型污染过程期间,五个州市的气团以来自缅甸的西南气流为主。综上,来自西南方向的污染物传输是导致滇南城市群出现PM2.5污染的主要原因。The Yunnan southern urban agglomeration is a high-risk area for environmental air pollution in Yunnan Province.To clarify the status of environmental air quality and the causes of pollution in the sub-region,the paper analysed the ambient air monitoring data from 2021 to 2022,the results showed that the overall atmospheric environment quality of the southern Yunnan urban agglomeration remained excellent,with an excellent rate ranged from 96.7%to 100%.The pollution periods were concentrated in March and April,with fine particulate matter as the primary pollutant.During the study period,the spatial and temporal distribution of Aerosol Optical Depth(AOD)was highly consistent with the distribution of fire points in the urban agglomeration of southern Yunnan Province and the countries of the Indo-China Peninsula.Backward trajectory analysis showed that during typical pollution processes,the air masses of the five prefectures and cities were mainly dominated by southwest airflow from Myanmar.In summary,the transport of pollutants from the southwest direction was the main reason for PM2.5 pollution in the southern Yunnan urban agglomeration.

关 键 词：滇南城市群 中南半岛 生物质燃烧 传输 空气质量 

分 类 号：X51[环境科学与工程—环境工程]