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Estimating single scattering albedo of winter wheat over the North China Plain using AMSR-E data

Estimating single scattering albedo of winter wheat over the North China Plain using AMSR-E data
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摘要 We proposed a method to estimate single scattering albedo of winter wheat over the North China Plain with AMSR-E passive microwave imagery. The relationships of single scattering albedo and optical depth between 6. 925 GHz and 10. 65 GHz were derived from simulations. To retrieve the single scattering albedo,the relationships were combined with the physical expressions of microwave vegetation indices derived from the first-order parameterized emission model. Comparisons with normalized difference vegetation index( NDVI) obtained from daily MODIS reflectance product showed that the variations in winter wheat single scattering albedo were similar to those of winter wheat NDVI. However,several differences were observed. NDVI showed saturation from the heading stage to the milky stage of winter wheat,whereas single scattering albedo remained sensitive to the growth of winter wheat. Single scattering albedo offers certain advantages in reflecting the growth status of winter wheat. We proposed a method to estimate single scattering albedo of winter wheat over the North China Plain with AMSR-E passive microwave imagery. The relationships of single scattering albedo and optical depth between 6. 925 GHz and 10. 65 GHz were derived from simulations. To retrieve the single scattering albedo,the relationships were combined with the physical expressions of microwave vegetation indices derived from the first-order parameterized emission model. Comparisons with normalized difference vegetation index（ NDVI） obtained from daily MODIS reflectance product showed that the variations in winter wheat single scattering albedo were similar to those of winter wheat NDVI. However,several differences were observed. NDVI showed saturation from the heading stage to the milky stage of winter wheat,whereas single scattering albedo remained sensitive to the growth of winter wheat. Single scattering albedo offers certain advantages in reflecting the growth status of winter wheat.
作者 CHAI Linna WU Fengmin ZHANG Lixin SHI Jiancheng
机构地区 State Key Laboratory of Remote Sensing Science State Key Laboratory of Remote Sensing Science Chongqing Geomatics Center
出处 《遥感学报》 EI CSCD 北大核心 2015年第1期153-161,共9页 NATIONAL REMOTE SENSING BULLETIN
基金 National Natural Science Foundation of China(No.41171259) National Basic Research Program of China(973 Program)(No.2013CB733406)
关键词 single scattering albedo winter wheat AMSR-E parameterized model microwave vegetation indices passive microwave single scattering albedo, winter wheat, AMSR-E, parameterized model, microwave vegetation indices, passive microwave
分类号 S512.11 [农业科学—作物学]
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