GOSAT与TROPOMI的甲烷柱浓度(XCH_(4))对比分析  

Comparison analysis of methane column concentrations(XCH_(4)) between GOSAT and TROPOMI

作　　者：曹钰 李如仁[1] 张慧芳[2] 李会亚 方君君 陈报章[2,4,5] CAO Yu;LI Ru-ren;ZHANG Hui-fang;LI Hui-ya;FANG Jun-jun;CHEN Bao-zhang(School of Transportation and Geomatics Engineering,Shenyang Jianzhu University,Shenyang 110168,China;State Key Laboratory of Geographic Information Science and Technology,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China;Shenzhen Ecological Environment Monitoring Center Station of Guangdong Province,Shenzhen 518049,China;College of Resources and Environment,University of Chinese Academy of Sciences,Beijing 100049,China;Jiangsu Collaborative Innovation Center for Geographic Information Resources and Development and Utilization,Nanjing 210023,China)

机构地区：[1]沈阳建筑大学交通与测绘工程学院,辽宁沈阳110168 [2]中国科学院地理科学与资源研究所,地理信息科学与技术系国家重点实验室,北京100101 [3]广东省深圳生态环境监测中心站,广东深圳518049 [4]中国科学院大学资源与环境学院,北京100049 [5]江苏省地理信息资源与开发利用协同创新中心,江苏南京210023

出　　处：《中国环境科学》2025年第3期1185-1197,共13页China Environmental Science

基　　金：中国科学院基础与交叉前沿科研B类先导专项(XDB0740300);资源与环境信息系统国家重点实验室自主创新项目(KPI005);新疆维吾尔自治区重点研发计划项目(2021B03002-2);国家自然科学基金资助项目(41977404,41771114)。

摘　　要：甲烷(CH_(4))作为大气中主要的温室气体,其空间分布特征是气候研究的主要内容.然而,多源卫星观测的甲烷柱浓度(XCH_(4))数据之间存在差异,对这些差异的系统评估有助于提高其科学应用的准确性.本研究对2019年3月~2023年2月期间的温室气体观测卫星(GOSAT,Greenhouse Gases Observing Satellite)和对流层观测仪(TROPOMI,TROPOspheric Monitoring Instrument)所获得的XCH_(4)产品进行比较分析,并使用总碳柱观测网(TCCON,Total Carbon Column Observing Network)数据进行评估.结果表明,两颗卫星共同特征为:赤道附近XCH_(4)较高,向两极递减,北半球的XCH_(4)值普遍高于南半球;年际变化中,南半球的波动幅度较大,达到±15×10^(-9);季节变化表现为夏季较低,冬季较高.差异特征为:TROPOMI的数据量是GOSAT的1300倍;GOSAT在北美和非洲的年均增长率(13.08×10^(-9)/a和13.92×10^(-9)/a)略低于TROPOMI(13.34×10^(-9)/a和14.12×10^(-9)/a),且南美的年际振幅(16.10×10^(-9)/a)较大;夏季两颗卫星的XCH_(4)差异最大,为-5.00×10^(-9).经与TCCON数据验证分析显示:两颗卫星都具有较高的一致性,但也存在误差,具体而言TCCON与GOSAT和TROPOMI的差值分别为-7.61×10^(-9) (南北半球分别为-4.59×10^(-9)和-4.63×10^(-9))和-5.03×10^(-9) (南北半球分别为-6.70×10^(-9)和0.18×10^(-9)).As one of the major greenhouse gases in the atmosphere,the spatial distribution characteristics of Methane (CH_(4)) were the main content of climate research.However,differences were observed between the methane column concentration (XCH_(4)) data from multiple satellite sources.A systematic evaluation of these differences was conducted to improve the accuracy of its scientific application.The XCH_(4) products obtained by the Greenhouse Gases Observing Satellite (GOSAT) and the Tropospheric Monitoring Instrument (TROPOMI) from March 2019 to February 2023 were compared and analyzed,and the Total Carbon Column Observing Network (TCCON) data were used for evaluation.The results showed that the two satellites shared the following common characteristics:XCH_(4) was higher near the equator and decreased towards the poles,with XCH_(4) values in the northern hemisphere generally being higher than those in the southern hemisphere;In the interannual variation,the fluctuation range in the southern hemisphere was larger,reaching±15×10^(-9);Seasonal variation was characterized by lower values in summer and higher values in winter.The differences were as follows:The data volume of TROPOMI was found to be 1300 times greater than that of GOSAT;The annual average growth rates of GOSAT in North America and Africa (13.08×10^(-9)/a and 13.92×10^(-9)/a) were slightly lower than those of TROPOMI (13.34×10^(-9)/a and 14.12×10^(-9)/a),while the interannual amplitude in South America (16.10×10^(-9)/a) was found to be larger.The XCH_(4) difference between the two satellites in summer was found to be the largest,with a measurement of-5.00×10^(-9).Verification and analysis with TCCON data showed that both satellites exhibited high consistency,although errors were also observed.Specifically,the differences between TCCON and GOSAT and TROPOMI were-7.61×10^(-9) (-4.59×10^(-9) and-4.63×10^(-9) in the northern and southern hemispheres,respectively) and-5.03×10^(-9) (-6.70×10^(-9) and 0.18×10^(-9) in the northern and southern hemisp

关 键 词：XCH_(4) GOSAT TROPOMI 交叉验证 遥感 

分 类 号：X511[环境科学与工程—环境工程]