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文章摘要

十三五”期间多省交界区域空气质量演变特征分析

Evolution Characteristics of Air Quality in Multi provincial Border Region during the 13th Five Year Plan Period

DOI：

英文关键词: Ambient air quality Backward air mass trajectory Multi provincial border region Yongzhou

基金项目:国家重点研发计划重大科学仪器设备开发专项基金资助项目（2017YFF0108400）；国家环境保护重金属污染监测重点实验室开放基金资助项目（SKLMHM202217）；湖南省重点领域研发“PM2.5与臭氧复合污染协同控制技术研究”基金资助项目（2022SK202062）

作者	单位
甘杰	湖南省生态环境监测中心，国家环境保护重金属污染监测重点实验室
刘静	湖南省长沙生态环境监测中心
唐婉	湖南省永州生态环境监测中心
张瑞磊	湖南省永州生态环境监测中心

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中文摘要:

基于2016—2020年湖南省永州市国、省控环境空气自动监测站点的监测数据，应用HYSPLIT模型、潜在源贡献因子法及浓度权重轨迹分析等方法探究多省交界典型区域环境空气质量演变特征。结果表明：“十三五”期间，永州市11个区县平均优良天数比例为930%，环境空气质量综合指数范围为290～346，SO2、PM25、PM10浓度下降趋势明显；外来传输主要受东北部长距离和南部短距离输入性污染影响，其中冬半年主要受来自东北和西南两个方向的气团影响，短距离轨迹数占总轨迹数的716%，长距离轨迹数占284%，重污染天气主要受湖南省长株潭方向、广西和广东省方向的省内、外短距离气团影响较大，贡献率分别为318%、314%。

英文摘要:

Based on the monitoring data from national and provincial ambient air automatic monitoring stations in Yongzhou， Hunan from 2016 to 2020， the evolution characteristics of ambient air quality in typical multi provincial border region were investigated by HYSPLIT model， potential source contribution factor method and concentration weight trajectory analysis. The results showed that during the 13th Five Year Plan period， the average proportion of days with good air quality in 11 districts of Yongzhou was 93.0%， the ambient air quality comprehensive index ranged from 2.90 to 3.46. The concentration of SO2， PM2.5 and PM10 had an obvious decreasing trend. External transport was mainly affected by long distance transportation of pollutants in the northeast and short distance transportation in the south. From October to next March， it was mainly affected by air mass from the northeast and southwest. The number of shortdistance tracks accounted for 71.6%， and the long distance tracks accounted for 28.4%. Heavily polluted weather was mainly affected by short distance transportation of air mass from Changzhutan in Hunan and neighboring Guangxi and Guangdong provinces， with contribution rates of 31.8% and 31.4%， respectively.

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