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Research of methane emissions of the wetlands with backscattering properties

Methane is an important greenhouse gas (GHG) in the atmosphere. Conventional methods with Optical and infrared technology still have some questioned in large-area and time. With its advantage of acquiring geo-information in timely, speedy, all-day and all-weather over large areas, microwave remote sensing is one powerful approach in monitoring methane emissions to conventional methods. Ground-based scatterometer was employed to multi-wave and multi-polarization measurement to obtain the microwave scattering coefficients. The methane emission was analyzed by the microwave scattering coefficients and the parameters of the vegetation in observation area. Besides, RADARSAT-2 images are ordered to offer data support to the observation of methane emission from large-sized wetlands. Additionally, the comparison of this experiment results and former experiment results of methane emission from paddy land was done. The distinction of the two significant methane emission sources is analyzed in the paper.