四川环境2023，Vol.42Issue(6)：37-44,8.DOI:10.14034/j.cnki.schj.2023.06.006
长株潭大气重污染的成因分型和冷空气侵入型路径
Causes Classification and Cold Air Intrusion Path of Heavy Air Pollution in Chang Zhu Tan
摘要
Abstract
In order to study the causes and characteristics of different types of heavy pollution weather,this paper analyzed the ambient air monitoring data and meteorological data of the three cities of Changsha-Zhuzhou-Tanzhou from 2014 to 2019.It was found that there were 35 heavy pollution processes in the past six years.According to their causes,they can be divided into four types:cold air induced type(74.3％),festival firecrackers set off type(17.1％),high altitude dry trough type(5.7％)and static stable type(2.9％).Among them,the main part is related to cold air intrusion(74.3％).This paper discussesd the meteorological mechanism of the formation of this kind of heavily polluted weather based on typical cold air intrusion cases,and analyzed that the dynamic effect,thermal effect and relative humidity rise of cold air are the meteorological inducements of the formation of heavily polluted weather.The study found that the characteristics of heavy air pollution under different cold air paths were significantly different,and there were four typical paths for heavy pollution formation,namely,the West Road,the North Road,the East Road and the Compound Road,with a high degree of coincidence with the cold air invasion path.Finally,Meteofinfo was used to calculate and cluster the backward trajectory of Changsha Station from December 2014 to January 2019,input the PM2.5 monitoring data of the same period,and use the TrajStat module to carry out CWT analysis,which confirmed that there were indeed West,North and East roads entering Hunan,which was consistent with the diagnostic analysis results.关键词
长株潭/重污染/冷空气/后向轨迹/CWTKey words
Chang Zhu Tan/heavy pollution/cold air/backward trajectory/CWT分类
资源环境引用本文复制引用
李细生,陈媛,张克非,易飞,张华,邓新林..长株潭大气重污染的成因分型和冷空气侵入型路径[J].四川环境,2023,42(6):37-44,8.基金项目
国家自然科学基金项目(No.41271095) （No.41271095）
湖南省气象局2020年重点课题(XQKJ20A001). （XQKJ20A001）
