ABSTRACT CH4 (methane) is an important greenhouse gas that has a significant impact on the formation of, and change in, the global climate. Through the development of remote sensing technology, a series of remote sensing detectors to monitor CH4 sources and sinks have been launched into space. Although a series of studies have been conducted around the CH4 concentration retrieved by AIRS (The Atmospheric Infrared Sounder instrument), SCIAMACHY (The Scanning Imaging Absorption spectrometer for Atmospheric Chartography instrument), and GOSAT (The Greenhouse Gases Observing Satellite), there have been few comprehensive comparative studies between these three satellite results and ground-based data. In this article, the correlation coefficient, root-mean-square deviation (RMSD), and bias are used to evaluate the CH4 retrieved from satellite data. The results reveal that: AIRS can reflect the distribution and changes of CH4 all over the world. The space coverage of GOSAT is focused between 60°S to 60°N, and the correlation of GOSAT with land surface stations is generally better than that with ocean surface stations. The space coverage of SCIAMACHY is between GOSAT and AIRS. Though SCIAMACHY data show a poor consistency with surface measurements, SCIAMACHY can also reflect the spatial and temporal dynamic distribution of CH4 around the world to a certain extent.

中文翻译：

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来自 SCIAMACHY、AIRS 和 GOSAT 的全球甲烷浓度与地面站测量的比较分析

摘要 CH4（甲烷）是一种重要的温室气体，对全球气候的形成和变化具有重大影响。通过遥感技术的发展，一系列监测 CH4 源和汇的遥感探测器已发射到太空。尽管围绕AIRS（大气红外测深仪）、SCIAMACHY（大气图表仪器的扫描成像吸收光谱仪）和GOSAT（温室气体观测卫星）反演的CH4浓度进行了一系列研究，但很少这三个卫星结果与地面数据之间的综合比较研究。在本文中，相关系数、均方根偏差 (RMSD) 和偏差用于评估从卫星数据中检索到的 CH4。结果表明：AIRS可以反映全球CH4的分布和变化。GOSAT 的空间覆盖集中在 60°S 到 60°N 之间，GOSAT 与陆面台站的相关性普遍优于与海面台站的相关性。SCIAMACHY的空间覆盖范围介于GOSAT和AIRS之间。尽管SCIAMACHY数据与地表测量的一致性较差，但SCIAMACHY也能在一定程度上反映全球CH4的时空动态分布。