Articles | Volume 22, issue 3
https://doi.org/10.5194/hess-22-1649-2018
https://doi.org/10.5194/hess-22-1649-2018
Research article
 | 
06 Mar 2018
Research article |  | 06 Mar 2018

Controls on surface soil drying rates observed by SMAP and simulated by the Noah land surface model

Peter J. Shellito, Eric E. Small, and Ben Livneh

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Revised manuscript accepted for HESS
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Cited articles

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Betts, A. K., Chen, F., Mitchell, K. E., and Janjić, Z. I.: Assessment of the Land Surface and Boundary Layer Models in Two Operational Versions of the NCEP Eta Model Using FIFE Data, Mon. Weather Rev., 125, 2896–2916, https://doi.org/10.1175/1520-0493(1997)125<2896:AOTLSA>2.0.CO;2, 1997. 
Breshears, D. D., Nyhan, J. W., Heil, C. E., and Wilcox, B. P.: Effects of Woody Plants on Microclimate in a Semiarid Woodland: Soil Temperature and Evaporation in Canopy and Intercanopy Patches, Int. J. Plant Sci., 159, 1010–1017, https://doi.org/10.1086/314083, 1998. 
Campbell, G. and Norman, J.: Introduction to Enviromental Biophysics, 2nd ed., Springer-Verlag, New York, 1998. 
Campbell, G. S.: Simple Method for Determining Unsaturated Conductivity from Moisture Retention Data, Soil Sci., 117, 311–314, 1974. 
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After soil gets wet, much of the surface moisture evaporates directly back into the air. Recent satellite data show that this process is enhanced when there is more water in the soil, less humidity in the air, and less vegetation covering the ground. A widely used model shows similar effects of soil water and humidity, but it largely misses the role of vegetation and assigns outsized importance to soil type. These results are encouraging evidence that the satellite can be used to improve models.