Thermal hydraulic disaggregation of SMAP soil moisture over the continental United States

Pang-Wei Liu, Rajat Bindlish, Peggy E Oneill, Bin Fang, Venkataraman Lakshmi, Zhengwei Yang, Michael Cosh, Tara Bongiovanni, Chandra Holifield Collins, Patrick Starks, John Prueger, David D. Bosch (+2 others)
2022 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
A thermal hydraulic disaggregation of soil moisture (THySM) algorithm was implemented to downscale NASA's soil moisture active passive (SMAP) enhanced soil moisture (SM) product to 1 km over the continental United States (CONUS). This algorithm was developed by combining thermal inertia theory with a soil hydraulic-based approach that considers fine-scale SM spatial distribution driven by both heat fluxes and hydraulic conductivity in soils. Relative soil wetness values were estimated using
more » ... surface temperature and normalized difference vegetation index for the thermal inertia model and using soil properties for the hydraulic model. The relative soil wetness values at 1 km from both models were then combined by using weighting functions whereby the spatial distribution of SM was governed more by thermal fluxes Manuscript
doi:10.1109/jstars.2022.3165644 fatcat:tf5wo2t72neypig2uzj6xbvvju