First sulfur dioxide observations from the environmental trace gases monitoring instrument(EMI)onboard the GeoFen-5 satellite  

基于搭载在高分五号的大气痕量气体差分吸收光谱仪(EMI)的二氧化硫反演

作　　者：Congzi Xia Cheng Liu Zhaonan Cai Fei Zhao Wenjing Su Chengxin Zhang Yi Liu 夏丛紫;刘诚;蔡兆男;赵飞;苏文静;张成歆;刘毅(School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China;Key Laboratory of Environmental Optics and Technology,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China;Center for Excellence in Regional Atmospheric Environment,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China;Department of Precision Machinery and Precision Instrumentation,University of Science and Technology of China,Hefei 230026,China;Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes,University of Science and Technology of China,Hefei 230026,China;Key Laboratory of Middle Atmosphere and Global Environment Observation,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China)

机构地区：[1]School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,China [2]Key Laboratory of Environmental Optics and Technology,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China [3]Center for Excellence in Regional Atmospheric Environment,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China [4]Department of Precision Machinery and Precision Instrumentation,University of Science and Technology of China,Hefei 230026,China [5]Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes,University of Science and Technology of China,Hefei 230026,China [6]Key Laboratory of Middle Atmosphere and Global Environment Observation,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China

出　　处：《Science Bulletin》2021年第10期969-973,M0003,共6页科学通报（英文版）

基　　金：supported by the National Key Research and Development Program of China (2018YFC0213104, 2017YFC0210002, 2016YFC0203302 and 2017YFC0212800);the National Natural Science Foundation of China (41722501, 91544212, 51778596, 41575021, 41977184 and 41875043);Anhui Science and Technology Major Project (18030801111);the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA23020301);the National Key Project for Causes and Control of Heavy Air Pollution (DQGG0102 and DQGG0205);the National High-Resolution Earth Observation Project of China (05-Y30B019001-19/20-3);Civil Aerospace Technology Advance Research Project (Y7K00100KJ)

摘　　要：Previous studies reported a significant overestimation of the Sentinel-5 Precursor(S-5P)official operational SO_(2) product in global SO_(2) emissions[1],[2].As such,China successfully launched the GaoFen-5 satellite into the sun-synchronous polar orbit on May 9,2018[3].我国于2018年5月9日成功发射高分5号卫星,搭载了国内首台用于痕量气体监测的星载紫外可见甚高光谱仪(大气痕量气体差分吸收光谱仪,EMI),可实现包括二氧化硫(SO_(2))在内的对流层大气成分高分辨率全球监测;有利于打破我国大气环境遥感对国外卫星载荷的依赖,提升自主可控性和增强我国在全球环境治理中的话语权.由于EMI的关键部件遭到国际禁运,其仪器稳定性与光谱质量同国外最新同类载荷相比尚有一定差距,给SO_(2)的反演带来了极大的挑战.本文针对EMI同步太阳光谱的缺失和在轨仪器性能衰变等问题,采取重构每日太阳光谱和在轨光谱二次定标,大幅降低了反演条带现象和拟合残差,成功反演对流层SO_(2)柱总量,反演精度达到国外载荷相当水平.该产品与国外星载和地面观测产品均表现出良好的时空一致性(R>0.63).此外,该产品还提供火山羽流的高度,可用于气候和航空安全等方面研究.

关 键 词：太阳光谱 二氧化硫 时空一致性 环境遥感 光谱质量 地面观测 痕量气体 对流层大气 

分 类 号：X831[环境科学与工程—环境工程] O657.3[理学—分析化学]