卫星观测在甲烷排放清单校核中的应用  

Application of satellite observations to verify methane emission inventories

作　　者：张羽中 毛慧琴 陈翠红 梁若思 ZHANG Yuzhong;MAO Huiqin;CHEN Cuihong;LIANG Ruosi(Key Laboratory of Coastal Environment and Resources of Zhejiang Province,School of Engineering,Westlake University,Hangzhou 310030,China;Institute of Advanced Technology,Westlake Institute for Advanced Study,Hangzhou 310024,China;Satellite Application Center for Ecology and Environment,Ministry of Ecology and Environment of the People's Republic of China,Beijing 100094,China;College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]西湖大学工学院浙江省海岸带与资源重点实验室,杭州310030 [2]西湖高等研究院,杭州310030 [3]生态环境部卫星环境应用中心,北京100094 [4]浙江大学环境与资源学院,杭州310058

出　　处：《遥感学报》2024年第8期1940-1954,共15页NATIONAL REMOTE SENSING BULLETIN

基　　金：国家重点研发计划(编号:2021YFB3901000)。

摘　　要：甲烷是重要的温室气体。大气甲烷排放来源多,影响因素复杂,基于排放因子和活动水平“自下而上”编制的排放清单有较大的不确定性。覆盖全球的甲烷卫星观测为“自上而下”验证及校正排放清单提供了有效手段。本文系统介绍了利用甲烷卫星观测和大气传输模型进行正向和反演清单校核的原理方法、关键技术和研究现状,并以2020年为例,应用GOSAT卫星甲烷观测、GEOS-Chem大气化学传输模型对全球甲烷排放清单进行了正向和反演校核。结果表明,在甲烷排放量最大的10个国家中,中国、印尼排放量显著低于先验清单,俄罗斯、印度、孟加拉国排放显著高于先验清单,其他国家与先验估计无统计显著的区别。最后,本文展望了基于卫星观测的甲烷清单校核技术的发展方向。Methane is a strong greenhouse gas and is responsible for roughly a quarter of radiative forcing since industrialization. Reducing anthropogenic methane emissions is considered a vital measure to slow down climate change. Conventional “bottom-up” inventories, which are compiled based on emission factors and activity data, are subject to large uncertainties. Atmospheric observations such as those made by satellite instruments provide a useful “top-down” approach for verifying and improving emission inventories. This study aims to present the application of satellite observations to the verification of methane emission inventories through forward simulations and inversion analyses.We first presented varied types of satellite observations(short-wave infrared vs. thermal infrared observations, area-flux mappers vs.point-source imagers) and retrieval methods(CO2-proxy method vs. full-physics method) and their suitability for inventory verification. We then extensively discussed the role of chemical transport models in interpreting satellite observations, the method of properly comparing model methane simulations to satellite column observations, and the effects of simulation errors on emission inventory verification. Finally,we demonstrated the two-stage verification with forward simulations and then an inverse analysis for global methane emissions. They were conducted using the GEOS-Chem chemical transport model, GOSAT methane column observations for 2020, and two sets of bottom-up emission inventories.In the forward simulation, we developed a bias correction procedure to reduce the season-and latitude-dependent systematic biases.The bias-corrected simulation results were compared with satellite column observations to qualitatively assess the quality of emission inventories. In the inverse analyses, we presented the quantification of emissions for top methane-emitting countries. Results showed that the prior inventory significantly overestimated methane emissions in China and Indonesia, underestimated those i

关 键 词：遥感 温室气体 甲烷 卫星 碳排放 清单校核 反演 

分 类 号：TP701[自动化与计算机技术—检测技术与自动化装置] P2[自动化与计算机技术—控制科学与工程]