A review of spatial downscaling of satellite remotely sensed soil moisture

Jian Peng, Alexander Loew, Olivier Merlin, Niko E. C. Verhoest
2017 Reviews of Geophysics  
Satellite remote sensing technology has been widely used to estimate surface soil moisture. Numerous efforts have been devoted to develop global soil moisture products. However, these global soil moisture products, normally retrieved from microwave remote sensing data, are typically not suitable for regional hydrological and agricultural applications such as irrigation management and flood predictions, due to their coarse spatial resolution. Therefore, various downscaling methods have been
more » ... sed to improve the coarse resolution soil moisture products. The purpose of this paper is to review existing methods for downscaling satellite remotely sensed soil moisture. These methods are assessed and compared in terms of their advantages and limitations. This review also provides the accuracy level of these methods based on published validation studies. In the final part, problems and future trends associated with these methods are analyzed. PENG ET AL. DOWNSCALE SATELLITE-BASED SOIL MOISTURE 341
doi:10.1002/2016rg000543 fatcat:lrxngwiqxjddhfnl2yzd6y7lk4