太原盆地霾日气溶胶垂直分布及气象要素分析  

Analysis of Aerosol Vertical Distribution Characteristics and Meteorological Elements of Haze Day in the Taiyuan Basin

作　　者：杨倩 郭媛媛 孙颖姝 宋秀瑜 米晓楠[1] 栾青[1] 赵永强[1] 李孟蔚 Yang Qian;Guo Yuanyuan;Sun Yingshu;Song Xiuyu;Mi Xiaonan;Luan Qing;Zhao Yongqiang;Li Mengwei(Shanxi Climate Centert Taiyuan,Shanxi 030002,China;Shanxi Meteorological Observatory,Taiyuan,Shanxi 030002,China;Dalian Meteorological Equipment Support Center,Dalian,Liaoning 116001,China)

机构地区：[1]山西省气候中心,山西太原030002 [2]山西省气象台,山西太原030002 [3]大连市气象装备保障中心,辽宁大连116001

出　　处：《中国激光》2022年第7期155-162,共8页Chinese Journal of Lasers

基　　金：山西省科技攻关项目(20130311037-2);山西省气象局重点课题(SXKZDQH201510009);山西省气象局面上项目(SXKMSQH20226312);山西省气象局青年基金项目(SXKQNQH20195645)。

摘　　要：近年来,太原盆地气溶胶污染比较严重。为探讨太原盆地气溶胶垂直分布及气象要素的影响,本研究团队应用CALIOP气溶胶资料、地面观测站资料获得了太原盆地2018—2020年气溶胶消光系数的垂直分布;基于HYSPLIT后向轨迹和聚类分析方法,结合CALIOP气溶胶类型数据、NCEP/NCAR再分析资料、MICAPS高空和地面常规观测资料对太原盆地不同来源的气溶胶的垂直分布、类型及天气形势进行了探讨。结果表明:太原盆地霾日气溶胶消光系数的最大值为1.22 km^(-1),消光系数随着高度的增加而减小;晴日消光系数的最大值为0.33 km^(-1);新疆和内蒙古方向的气团对太原霾日的贡献最大(46%),其次为来自本地的污染气团(39%);太原盆地受西北或偏西气流的影响,同时在低层暖平流的控制下,易聚集污染沙尘型气溶胶;在静稳天气背景下,低层暖平流导致逆温层形成,地面弱气压区及弱风速区使污染物不易扩散,容易聚集污染沙尘型气溶胶和大陆污染型气溶胶;地面上,太原盆地处于高压底前部,地面风速较大,700~850 h Pa处的冷平流将高纬度的污染物输送至太原盆地,气溶胶以沙尘型气溶胶为主,气溶胶抬升高度较大。Objective Rapid economic expansion and terrain constraints are causing high levels of aerosol pollution in theTaiyuan Basin.Aerosols not only have an effect on people’s physical and mental health,but also on the earthatmosphere system’s energy balance due to their absorption and scattering of solar radiation.The majority ofresearch on the vertical characteristics of Taiyuan aerosols has been conducted using ground and aircraftobservations.Few studies have been conducted using spaceborne lidars to study the vertical distribution of aerosols inthe Taiyuan Basin.CALIOP data is frequently used in the research of aerosol vertical characteristics because it isused to identify the vertical distribution of global particles.The goal of this work is to examine the verticaldistribution of aerosol optical characteristics and aerosol types on hazy days in the Taiyuan Basin using CALIOP datato provide theoretical support for the government in developing an emission reduction plan.By studying the weatherconditions surrounding various sources of pollution,we may gain a better understanding of the effect ofmeteorological circumstances on the kind and spread of aerosols.Methods Firstly,we used the clear day and haze day determination method to determine the haze and clear days in the Taiyuan Basin from 2018 to 2020,using hourly weather observation data and daily weather phenomenon data.Then,using ground data and CALIOP data,we matched the haze and clear days and obtained the vertical distribution characteristics of the aerosol extinction coefficient for the haze and clear days based on the CALIOP data.The CALIOP data used in this research provides a vertical resolution of 30 m and a horizontal resolution of 333 m.The HYSPLIT model was then used to do a cluster analysis on the backward trajectory of haze days between 2018 and 2020.Finally,the vertical distribution characteristics of aerosols from various sources and the influence of meteorological factors were analyzed using CALIOP aerosol data,NCEP/NCAR reanalysis data,and MIC

关 键 词：遥感 霾日 气溶胶类型 CALIPSO 垂直分布 太原盆地 

分 类 号：X513[环境科学与工程—环境工程]