CALIOP激光探测的运城地区气溶胶垂直分布特征  

Characteristics of Aerosol Vertical Distribution in Yuncheng Area Based on CALIOP

作　　者：杨倩 韩琛惠 米晓楠[1] 王潇 王晓琼 赵永强[1] 杨超[1] Yang Qian;Han Chenhui;Mi Xiaonan;Wang Xiao;Wang Xiaoqiong;Zhao Yongqiang;Yang Chao(Shanxi Climate Center,Taiyuan,Shanxi 030002,China;Shanxi Meteorological Service Center,Taiyuan,Shanxi 030002,China;Xi’an Institute for Innovative Earth Environment Research,Xi’an,Shaanxi 710061,China)

机构地区：[1]山西省气候中心,山西太原030002 [2]山西省气象服务中心,山西太原030002 [3]西安地球环境创新研究院,陕西西安710061

出　　处：《激光与光电子学进展》2022年第2期449-455,共7页Laser & Optoelectronics Progress

基　　金：山西省气象局重点课题(SXKZDQH201510009)。

摘　　要：利用2017年1月1日至2019年12月31日山西省运城地区9个气象站点的地面逐小时资料、地面日值资料和CALIOP激光雷达资料,分别对运城地区霾日和晴日的气溶胶垂直分布特征进行分析。结果表明:运城地区霾发生时,气溶胶主要聚集在0~2 km高度的大气层中,尤其是517 m左右的大气中,气溶胶的最大消光系数为0.61 km-1;0~1 km高度内,霾日最大消光系数约为晴日最大消光系数的3倍;白天与夜间气溶胶垂直分布有明显差别,在气溶胶消光系数相同的情况下,白天气溶胶所在的高度比夜间高;霾发生时,气溶胶体积退偏比集中在0~0.2;晴日近地面体积退偏比在0~0.2的分布频率低于霾日,小粒径气溶胶数量多于大粒径气溶胶数量。Ground hourly,daily,and CALIOP data from nine meteorological stations in the Yuncheng area of Shanxi Province from January 1,2017 to December 31,2019 were used to analyze the vertical aerosol distribution characteristics on haze and clear days.The results showed that aerosols were mainly concentrated in the atmosphere layer of 0-2 km on haze days,especially the layer of approximately 0.517 km,and the maximum aerosol extinction coefficient was 0.61 km-1.Within 0-1 km,on haze days,the maximum extinction coefficient was approximately three times greater than that on clear days.There was a significant difference in the vertical distributions of aerosols during the day and night.When the aerosol extinction coefficient was the same,the aerosol height was higher during the day than that at night.When haze events happened,volume depolarization ratios of aerosols concentrated in0-0.2.On clear days,the frequency of near-surface volume depolarization ratios ranged from 0 to 0.2,which was lower than that on haze days,and the number of small-particle aerosols was greater than that of large-particle aerosols.

关 键 词：遥感 气溶胶 光学特性 垂直分布 消光系数 

分 类 号：X513[环境科学与工程—环境工程]