摘要
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.
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].
作者
夏丛紫
刘诚
蔡兆男
赵飞
苏文静
张成歆
刘毅
Congzi Xia;Cheng Liu;Zhaonan Cai;Fei Zhao;Wenjing Su;Chengxin Zhang;Yi Liu(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)
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)
