1、第 1 期陈荣等：银川市大气边界层逆温影响因素及其与冬季PM2.5的关系Influence factors of atmospheric boundary layer inversion in Yinchuan City and the relation with PM2.5 in winterCHEN Rong1，2，WANG Jianying1，3，YANG Wenjun1，4，CHEN Min1，2，WANG Qian1，2，LI Kun1，2（1.Key Laboratory for Meteorological Disaster Monitoring and Early Warnin
2、g and Risk Management of Characteristic Agriculture in Arid Regions，CMA，Key Laboratory of Meteorological Disaster Preventing and Reducing of Ningxia，Yinchuan 750002，China；2.Yinchuan Meteorological Bureau of Ningxia，Yinchuan 750002，China；3.Ningxia Meteorological Service Center，Yinchuan 750002，China；4
3、.Helan Meteorological Station of Ningxia，Helan 750200，China）Abstract：In order to explore the characteristics and influence factors of atmospheric boundary layer inversion in Yinchuan City and their relationship with winter PM2.5 pollution,based on the sounding and surface meteorological observation
4、data at Yinchuan meteorological station and the air quality monitoring data in Yinchuan City from 2015 to 2020,the characteristics of atmospheric boundary layer inversion and surface meteorological elements are analyzed.And on this basis that the influence of inversion and surface meteorological ele
5、ments on PM2.5 pollution weathers in winter is explored.The results are as follows:(1)The inversions in atmospheric boundary layer are more easily to occur in the early morning than in the evening in Yinchuan City,and most of the inversions are ground inversions,they are stronger and thinner than su
6、spension inversions.The inversion frequency and thickness are the largest in winter and the smallest in summer,while the inversion intensity is the strongest in autumn and the weakest in summer.(2)In winter,the inversions are easily to occur on a sunny day with average surface wind speed from 1.0 to
7、 1.5 ms-1 and relative humidity from 30%to 60%.(3)Ground inversion is one of the main meteorological factors affecting PM2.5 pollution weathers in winter.When the inversion thickness exceeds 596 m and the intensity exceeds 1.4(100 m)-1,PM2.5 pollution weathers are easily to occur,and the pollution i
8、s aggravated with the increase of inversion thickness and intensity.(4)Under PM2.5 pollution weathers in winter,the sky is mostly sunny in the early morning,the average surface wind speed is usually less than 1.3 ms-1,the relative humidity is greater than 54%,and the pollution is aggravated with the
9、 increase of humidity.(5)The boundary layer height is significantly negatively correlated with PM2.5 mass concentration,and the lower boundary layer height is,the heavier PM2.5 pollution is.Key words：atmospheric boundary layer；inversion；meteorological elements；PM2.5 pollution；Yinchuan City（责任编辑：蔡迪花；校对：刘晓云）干旱气象 51篇论文入选中国知网高被引、高下载、高PSCI论文近日，中国知网的 学术精要数据库 中，干旱气象 共有6篇论文入选“高影响力”论文（即三高论文），21篇论文入选“高被引论文”，11篇论文入选“高下载论文”，24篇论文入选“高PSCI论文”。学术精要数据库（https：/ 中国学术期刊影响因子年报（自然科学与工程技术版）显示，“大气科学”学科分类中，干旱气象 在36个期刊中学科影响力指数（CI）排名第8，连续三年处于Q1区。2021年 干旱气象 总被引频次1 897，影响因子1.625，他引影响因子1.067，近年来长足发展，学科影响力不断提升。131