机载高光谱分辨率激光雷达探测大气气溶胶光学特性及污染研究  

Study on Airborne High Spectral Resolution Lidar Detecting Optical properties and Pollution of Atmospheric Aerosol

作　　者：朱首正 卜令兵[1] 刘继桥[2] 王勤 杨巨鑫 张扬 竹孝鹏[2] 陈卫标[2] Zhu Shouzheng;Bu Lingbing;Liu Jiqiao;Wang Qin;Yang Juxin;Zhang Yang;Zhu Xiaopeng;Chen Weibiao(Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science&Technology,Nanjing,Jiangsu 210044,China;Key Laboratory of Space Laser Communication and Detection Technology,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Shanghai Institute of Satellite Engineering,Shanghai 201109,China)

机构地区：[1]南京信息工程大学气象灾害预警与评估协同创新中心,江苏南京210044 [2]中国科学院上海光学精密机械研究所空间激光信息传输与探测技术重点实验室,上海201800 [3]上海卫星工程研究所,上海201109

出　　处：《中国激光》2021年第17期158-170,共13页Chinese Journal of Lasers

基　　金：国家自然科学基金(41675133);国家重点研究计划(2017YFF0104605);民用航天预研项目(D040103)。

摘　　要：为实现对气溶胶光学参数的大范围、高精度、定量化探测,使用一套基于碘分子滤波器的机载高光谱分辨率激光雷达(HSRL)系统开展飞行实验,同时在地面设置辅助验证观测站。实验研究了秦皇岛地区的气溶胶变化趋势、不同下垫面类型下的气溶胶分布以及秦皇岛气溶胶光学厚度(AOD)的高值地区,并将HSRL系统反演的AOD数据与地面站点的太阳光度计和卫星遥感器测得的数据进行对比分析,三者相关性优于0.95。结合地面气象数据和机载观测数据,对不同飞行天次下秦皇岛地区的污染物来源以及城镇、山地、海洋等不同下垫面类型下的气溶胶光学参数分布特征进行分析,包括气溶胶后向散射系数、气溶胶消光系数、雷达比、色比和退偏比。结果表明:城镇地区的大气低层中以生物质燃烧和工业产生的气溶胶为主,海洋地区大气低层中以污染型海洋气溶胶为主,山地地区大气低层中的粒子尺寸较大,以污染型沙尘粒子为主。Objective Aerosol plays an important role in assessing radiation,climate,cloud formation,and environmental pollution.In addition,the optical and physical properties of aerosols impact the formation and transmission of air pollutants.Therefore,the temporal and spatial distribution characteristics of tropospheric aerosols are important for studying the uncertainty of the aerosol environment and climate change.It is important to study the optical properties and vertical distribution changes of aerosols through effective observation methods.As a widely used active detection instrument of aerosols,lidar plays an irreplaceable role in the detection of vertical distribution of aerosol and changes in pollutant transmission.Related scholars have researched the distribution characteristics of aerosol extinction coefficient(AEC)and aerosol backscatter coefficient(ABC)profiles,as well as the regional pollution and climate impact by different types of aerosol distribution characteristics,which promotes the development of research methods and lidar detection.High spectral resolution lidar(HSRL)can detect aerosol optical parameters,such as AEC and ABC,enhancing the inversion accuracy of aerosol optical parameters.It provides an efficient method for accurate analysis of climate effects and long-term evolution characteristics of aerosols,as well as the evolution of regional and long-term pollution research.Methods In this study,the HSRL system based on an iodine molecular filter is used to conduct an aerosol observation experiment in Qinhuangdao in March,2019.Firstly,the correlation and absolute deviation between the aerosol optical depth(AOD)results retrieved by HSRL system and the data detected by the sunphotometer on the ground site and satellite remote sensor are discussed and analyzed.Combined with the AOD results of HSRL sysytem and ground meteorological data,the optical characteristics and pollution changes of aerosols during the pollution process in the Qinhuangdao area are studied.The distribution of aerosols on a pollut

关 键 词：遥感 机载高光谱分辨率激光雷达 气溶胶垂直分布 气溶胶光学参数 污染分析 

分 类 号：P412.25[天文地球—大气科学及气象学]