基于CALIPSO卫星和地面观测资料的气溶胶垂直分布对比  

Comparison of Aerosol Vertical Distribution Based on CALIPSO Satellite and Ground Observation Data

作　　者：罗卉卉 陈臻懿 张天舒 范广强 项衍 Luo Huihui;Chen Zhenyi;Zhang Tianshu;Fan Guangqiang;Xiang Yan(Key Laboratory of Environmental Optics and Technology,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei,Anhui 230031,China;University of Science and Technology of China,Hefei,Anhui 230026,China)

机构地区：[1]中国科学院安徽光学精密机械研究所环境光学与技术重点实验室,安徽合肥230031 [2]中国科学技术大学,安徽合肥230026

出　　处：《中国激光》2019年第12期31-39,共9页Chinese Journal of Lasers

基　　金：国家重点研发计划(2018YFC0213100);中国科学院青年创新促进会人才支撑计划

摘　　要：利用地基激光雷达和CALIPSO卫星数据,选取廊坊地区清洁天、霾天和多云3种天气个例,对廊坊市气溶胶垂直分布特性进行对比分析,并判断污染物的可能来源。结果表明不同天气类型下两个激光雷达反演的消光系数廓线整体一致,相关系数高。清洁天气2 km以下有少量沙尘气溶胶,消光系数均小于0.2 km^-1,退偏比集中在0.10~0.30,色比值集中在0.5~1.0,粒子非球形度高且粒径大;霾天在低空500 m以下聚集着球形度高的细粒子污染物,消光系数最高超过2 km^-1,退偏比和色比值都较小,污染大陆型气溶胶和污染沙尘同时存在;多云天气下,垂直高度上只在出现云层的位置消光系数很大,廓线有尖峰,退偏比大部分小于0.02,色比集中在0.10左右,受到上升气流的影响,高空7 km以下都分布着少量沙尘气溶胶。In this study, we analyze the vertical distribution characteristics of aerosols in the Langfang city on clean, hazy, and cloudy days based on the ground-based lidar and CALIPSO satellite data and determine the possible sources of pollutants. The analysis results denote that the extinction coefficient profiles of the two lidar inversions are consistent under clear, hazy, and cloudy conditions and that the correlation coefficient is large. Small amounts of dust aerosols below 2 km can be observed on clear days, with an extinction coefficient of less than 0.2 km^-1, a depolarization ratio concentrated in 0.10-0.30, a color ratio concentrated in 0.5-1.0, high particle non-sphericity, and large particle size. Below 500 m, there exists a collection of fine particles exhibiting high sphericity on hazy days, with a maximum extinction coefficient of greater than 2 km^-1, small depolarization and small color ratios. Additionally, the polluted continental aerosols and the polluted dust are observed to simultaneously exist. On cloudy days, the extinction coefficient is large at the vertical height, where cloud layers appear, and the profile shows a sharp peak. The depolarization ratio is mostly less than 0.02, and the color ratio is concentrated at approximately 0.10. Furthermore, a small amount of dust aerosols is distributed under the influence of an updraft below 7 km.

关 键 词：大气光学 大气气溶胶 CALIPSO 消光系数 垂直分布 

分 类 号：X513[环境科学与工程—环境工程]