Research Progress of Satellite Remote Sensing Detection of Methane
Over the past 30 years,atmospheric methane concentrations have increased significantly,and about 25％of the global warming effect currently comes from methane.Therefore,accurate detection of methane is very important to combat global climate change.Compared with traditional ground-based,vehicle-based and airborne-based detection,satellite remote sensing technology can realize large-space-scale methane detection with all emission sources.This paper first clarifies the climatic effect of methane,then introduces the principles of remote sensing detection of methane by using short-wave infrared and thermal infrared bands,as well as the three satellite observation modes,which are nadir sounding,limb sounding and occultation sounding.Then,the progress of methane satellite payloads launched and planned to be launched in the future is further sorted out,and it is found that the spatiotemporal resolution and inversion accuracy of methane satellite remote sensing detection are continuously improving,showing the characteristics of multi-mode,multi-scale and multi-sensor fusion.Finally,the methane satellite remote sensing inversion algorithm is summarized and analyzed.This study can provide a reference for the application of existing methane satellite remote sensing detection and the development of methane remote sensing satellites in the future.
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