九江市大气污染物扩散气象条件分析  

Analysis of Meteorological Conditions forAtmospheric Pollutant Dispersion in Jiujiang City

作　　者：杨超 徐洁玲 YANG Chao;XU Jieling(Jiujiang Meteorological Office,332005,Jiujiang,Jiangxi,PRC)

机构地区：[1]九江市气象局,江西九江332005

出　　处：《江西科学》2021年第2期313-317,共5页Jiangxi Science

基　　金：江西省自然科学基金项目(20202BABL203038);江西省气象局面上科科学研究目“九江市空气质量监测预警预报技术研究”。

摘　　要：利用气象观测资料和环境监测数据,分析2018—2019年九江市大气污染物扩散气象条件,并对比分析周边南昌、景德镇大气污染物扩散条件,得出以下结论:九江、南昌、景德镇3地平均PM_(2. 5)浓度均呈现秋冬季高、春夏季低的特点;3地PM_(2. 5)浓度偏高时段主要在冬半年,九江明显更高;当冬季九江盛行偏北风和东北风时PM_(2. 5)浓度更高、污染更严重,2018—2019年九江逆温次数较南昌多,垂直扩散条件略差于南昌;受地形影响,冬半年常见的偏北风被大别山脉分流为西北风和东北风,九江位于两股气流的交汇处,九江南侧有山脉阻挡,不利于污染物向南扩散。Based on the meteorological observation data and environmental monitoring data,the meteorological conditions of air a pollutant diffusion in Jiujiang city from 2018 to 2019 were analyzed,and comparatively analyzed with the dispersion conditions of air pollutants in Nanchang and Jingdezhen.The results showed that the average PM2.5 concentration of Jiujiang,Nanchang,and Jingdezhen was high in autumn and winter,and low in spring and summer;the high PM_(2.5) concentration period in the three places was mainly in the winter half year.While Jiujiang was significantly higher.When northerly and northeasterly wind prevailed g in winter,the PM_(2.5) concentration was higher and the pollution was more serious.From 2018 to 2019,there were more temperature inversions appealing in Jiujiang than in Nanchang,and the vertical diffusion conditions in Jiujiang were slightly worse than in Nanchang.Affected by the terrain,the common northerly wind in winter half year wass divided into northwest wind and northeast wind by the Dabie mountains.Jiujiang is located at the intersection of two air currents,there are mountains on the south side of Jiujiang,which are conducive to the accumulation of pollutants and are not conducive to the spread of pollutants to the south.

关 键 词：空气质量 污染物 PM_(2.5) 扩散 

分 类 号：X51[环境科学与工程—环境工程] X16