河北省重点城市干湿季PM_(2.5)输送路径和来源分析  

Analysis of PM_(2.5)Transport Routes and Sources in Key Cities of Hebei Province during Dry and Wet Seasons

作　　者：鲍进剑 梁娟珠[1,2] BAO Jinjian;LIANG Juanzhu(Institute of Digital China,Fuzhou University,Fuzhou 350003,China;Key Laboratory of Spatial Data Mining and Information Sharing,Ministry of Education,Fuzhou University,Fuzhou 350003,China)

机构地区：[1]福州大学数字中国研究院,福建福州350003 [2]福州大学空间数据挖掘与信息共享教育部重点实验室,福建福州350003

出　　处：《测绘与空间地理信息》2023年第10期50-53,57,共5页Geomatics & Spatial Information Technology

基　　金：福建省科技计划项目(2020L3005)资助。

摘　　要：为深入研究河北省石家庄、邯郸、唐山以及邢台4座“退后十”重点城市干湿季PM_(2.5)的重污染传输潜在源区,结合GDAS数据,基于HYSPLIT后向轨迹,通过聚类分析、潜在污染源以及浓度权重的计算,对4座重点城市进行大气污染来源的分析。结果表明:1)PM_(2.5)质量浓度呈现为干季浓度较高、湿季浓度较低,同时地域差异较大;2)干季气团4个城市主要受山西省、陕西省、河南省和山东省重工业城市春冬季大量的燃煤、机动车尾气及二次反应携带高浓度气团的影响,该类气团轨迹传输路径较短,传输速度快,影响显著;3)湿季气团大多来源于沿海地区和北部内陆地区,由蒙古国传输至内蒙古地区,以自然源排放为主,受北部冷空气持续影响,使得大气污染物浓度稀释;4)PM_(2.5)较强潜在源区都集中在内蒙古西南部、陕西省东北部、山西省中南部、河南省北部,其中强潜在源区相似,主要集中在延安市、吕梁市、临汾市。In order to deeply study the potential sources of PM_(2.5)heavy pollution transmission in Shijiazhuang,Handan,Tangshan and Xingtai of Hebei province during dry and wet seasons,combined with GDAS data and based on HYSPLIT backward trajectory,this paper analyzes the sources of air pollution in four key cities through cluster analysis,potential pollution sources and concentration weight calculation.The results show that:(1)The concentration of PM_(2.5)is higher in dry season and lower in wet season,and the regional difference is great.(2)The dry season air mass in the four cities is mainly affected by a large amount of coal burning,motor vehicle exhaust and high concentration air mass carried by secondary reaction in the heavy industry cities of Shanxi,Shaanxi,Henan and Shandong provinces in spring and winter.(3)The wet season air mass is mostly from the coastal areas and northern inland areas,transmitted from Mongolia to Inner Mongolia,mainly from natural sources,affected by the continuous cold air in the north,making the concentration of air pollutants diluted.(4)The strong potential sources of PM_(2.5)are mainly in the southwest of Inner Mongolia,the northeast of Shaanxi,the south-central of Shanxi and the north of Henan.The strong potential sources are similar,mainly in Yan′an,Lvliang and Linfen.

关 键 词：PM_(2.5) 干湿季 后向轨迹 输送路径 潜在源区 河北省 

分 类 号：P237[天文地球—摄影测量与遥感]