H-SAF Visiting Scientist Program HSAF_CDOP2_VS12_02 Root-zone soil moisture index complementary validation at global scale based on triple collocation method. Comparison with State-Of- The-Art global scale root-zone soil moisture products
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Modeling and assimilation of root zone soil moisture using remote sensing observations in Walnut Gulch Watershed during SMEX04
Soil moisture status in the root zone is an important component of the water cycle at all spatial scales (e.g., point, field, catchment, watershed, and region). In this study, the spatio-temporal evolution of root zone soil moisture of the Walnut Gulch Experimental Watershed (WGEW) in Arizona was investigated during the Soil Moisture Experiment 2004 (SMEX04). Root zone soil moisture was estimat...
متن کاملValidation Analysis of SMAP and AMSR2 Soil Moisture Products over the United States Using Ground-Based Measurements
Soil moisture products acquired from passive satellite missions have been widely applied in environmental processes. A primary challenge for the use of soil moisture products from passive sensors is their reliability. It is crucial to evaluate the reliability of those products before they can be routinely used at a global scale. In this paper, we evaluated the Soil Moisture Active/Passive (SMAP...
متن کاملA physically based approach for the estimation of root-zone soil moisture from surface measurements: application on the AMMA database
In the present work, we present a new formulation for the estimation of the soil moisture in the root zone based on the measured value of soil moisture at the surface. The method sheds lights on the relationship between surface and root zone soil moisture. It derives from a simplified form of the soil water balance equation and provides a closed form of the relationship between the root zone an...
متن کاملRoot Zone Soil Moisture Assessment Using Remote Sensing and Vadose Zone Modeling
Soil moisture is an important hydrologic state variable critical to successful hydroclimatic and environmental predictions. Soil moisture varies both in space and time because of spatio-temporal variations in precipitation, soil properties, topographic features, and vegetation characteristics. In recent years, airand space-borne remote sensing campaigns have successfully demonstrated the use of...
متن کاملMapping Root Zone Soil Moisture Using Remotely Sensed Optical Imagery
Field-based soil moisture measurements are cumbersome. Remote sensing techniques based on active or passive microwave data have limitations. This paper presents and validates a new method based on land surface energy balances using remotely sensed optical data ~including thermal infrared!, which allows field and landscape-scale mapping of soil moisture depth-averaged through the root zone of ex...
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تاریخ انتشار 2013