Drying
; Evaporation
; Moisture
; Soil moisture
; Vegetation
; Continental scale
; Land surface modeling
; North american land data assimilation systems
; Potential evaporation
; Precipitation events
; Soil evaporation rates
; Soil evaporations
; Surface soil moisture
; Soils
英文摘要:
Drydown periods that follow precipitation events provide an opportunity to assess controls on soil evaporation on a continental scale. We use SMAP (Soil Moisture Active Passive) observations and Noah simulations from drydown periods to quantify the role of soil moisture, potential evaporation, vegetation cover, and soil texture on soil drying rates. Rates are determined using finite differences over intervals of 1 to 3 days. In the Noah model, the drying rates are a good approximation of direct soil evaporation rates, and our work suggests that SMAP-observed drying is also predominantly affected by direct soil evaporation. Data cover the domain of the North American Land Data Assimilation System Phase 2 and span the first 1.8 years of SMAP's operation.
Geological Sciences, University of Colorado Boulder, Boulder, United States; Cooperative Institute for Research in Environmental Science, Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Boulder, United States
Recommended Citation:
Shellito P,J,, Small E,et al. Controls on surface soil drying rates observed by SMAP and simulated by the Noah land surface model[J]. Hydrology and Earth System Sciences,2018-01-01,22(3)