星载高光谱分辨率激光雷达大气气溶胶和云探测研究  

Spaceborne High Spectral Resolution Lidar for Atmospheric Aerosols and Clouds Profiles Measurement

作　　者：胡建波 王雄 赵少华 王中挺 杨巨鑫 戴光耀[6] 谢缘 竹孝鹏[1,2,5] 刘东 侯霞[1,2,5,8] 刘继桥[1,2,5,8] 陈卫标 Hu Jianbo;Wang Xiong;Zhao Shaohua;Wang Zhongting;Yang Juxin;Dai Guangyao;Xie Yuan;Zhu Xiaopeng;Liu Dong;Hou Xia;Liu Jiqia;Chen Weibiao(Space Laser Engineering Department,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing100049,China;School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;Satellite Application Center for Ecology and Environment,Ministry of Ecology and Environment,Beijing 100094,China;Key Laboratory of Space Laser Communication and Detection Technology,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;College of Marine Technology,Faculty of Information Science and Engineering,Ocean University of China,Qingdao 266100,Shandong,China;College of Optical Science and Engineering,Zhejiang University,Hangzhou 310027,Zhejiang,China;Laoshan Laboratory,Qingdao 266237,Shandong,China)

机构地区：[1]中国科学院上海光学精密机械研究所航天激光工程部,上海201800 [2]中国科学院大学材料与光电研究中心,北京100049 [3]华中科技大学光学与电子信息学院,湖北武汉430074 [4]生态环境部卫星环境应用中心,北京100094 [5]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 [6]中国海洋大学信息科学与工程学部海洋技术学院,山东青岛266100 [7]浙江大学光电科学与工程学院,浙江杭州310027 [8]崂山实验室,山东青岛266237

出　　处：《光学学报》2023年第18期1-10,共10页Acta Optica Sinica

基　　金：中国科学院国际伙伴计划项目(18123KYSB20210013);上海市"科技创新行动计划"科技支撑碳达峰碳中和专项(22dz208700)。

摘　　要：为实现对全球气溶胶光学参数剖面的高精度测量,采用基于碘分子滤波器的高光谱分辨率探测技术。结合欧洲中期天气预报中心(ECMWF)的大气再分析数据集(ERA5)的温度和压强数据,选取在轨期间途经撒哈拉沙漠和加拿大山火区域的星载高光谱分辨率激光雷达(HSRL)的观测数据,对沙尘类气溶胶和烟尘类气溶胶的光学特性进行分析,包括气溶胶的后向散射系数、消光系数、退偏振比和雷达比。结果表明:撒哈拉沙漠地区近地面5km以内的气溶胶分布主要以沙尘类气溶胶为主,其退偏振比集中在0.2~0.4,雷达比数值集中在40~60sr;加拿大山火地区的气溶胶主要以烟尘类气溶胶为主,其退偏振比集中在0.02~0.15,雷达比在50~70sr范围。激光雷达特有的高光谱探测技术,在气溶胶和云的精细化探测和分类方面具有重要应用,将在环境监测中发挥重要作用。Objective On April 16,2022,the aerosol and carbon dioxide detection lidar(ACDL)was successfully launched with the atmospheric environment monitoring(DQ-1)satellite.The high spectral resolution lidar(HSRL)system of ACDL,which is responsible for measuring atmospheric aerosol and cloud profiles,has successfully worked in orbit for more than one year and provided accurate global aerosol and cloud profiles.Aerosols have a significant impact on the global radiation balance and climate change.The biggest unknown when it comes to predicting climate is the radiative effect between aerosols and clouds.Therefore,in order to determine the distribution and the change of aerosols in the atmosphere,it is important to make high-precision observations of aerosols in the atmosphere with high temporal and spatial resolution.As an active remote sensing instrument,lidar is widely used in atmospheric aerosol profiles with high temporal and spatial resolution and continuous observation during the day and night.High spectral resolution lidar has the advantage of separating atmospheric aerosols Mie scattering signal and molecular Rayleigh scattering signal,compared with traditional elastic scattering lidar.Therefore,HSRL can directly obtain the backscattering coefficient,extinction coefficient,depolarization ratio,and lidar ratio of aerosols,without assuming the lidar ratio.It significantly improves the accuracy of aerosol optical parameters which would be used widely in environment monitoring and climate study.Methods The spaceborne HSRL system of ACDL based on an iodine molecular filter is implemented in orbit to measure aerosol and cloud profiles with high accuracy.Combined with the temperature and pressure data of the atmospheric reanalysis dataset(ERA5)of the European Centre for Medium-Range Weather Forecasts(ECMWF),the optical parameters such as backscattering coefficient,extinction coefficient,depolarization ratio,and lidar ratio of aerosols are obtained through data inversion.Aerosols are classified by reference values of optical

关 键 词：大气气溶胶 云 气溶胶光学参数 星载激光雷达 高光谱分辨率探测技术 

分 类 号：P412.27[天文地球—大气科学及气象学]