Accounting for atmospheric boundary layer variability on flux estimation from RS observations

A Large Eddy Simulation (LES) model is coupled to a remote-sensing-based SVAT that accounts for soil and vegetation in order to study the feedback effects between surface state and spatial variability in fluxes, through the induction of spatial variability in the lower atmosphere. As such, this stud...

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Bibliographic Details
Published in:International journal of remote sensing 2008-01, Vol.29 (17-18), p.5275-5290
Main Authors: Timmermans, W. J., Bertoldi, G., Albertson, J. D., Olioso, A., Su, Z., Gieske, A. S. M.
Format: Article
Language:English
Subjects:
Applied geophysics
Earth sciences
Earth, ocean, space
Engineering Sciences
Exact sciences and technology
Internal geophysics
Other
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Summary:A Large Eddy Simulation (LES) model is coupled to a remote-sensing-based SVAT that accounts for soil and vegetation in order to study the feedback effects between surface state and spatial variability in fluxes, through the induction of spatial variability in the lower atmosphere. As such, this study focuses on sensible heat flux exchange. The simulations indicated that changes are introduced to the flux distributions mainly at higher surface temperatures. A scale-dependent method is presented to account for feedback effects. This showed the most significant correlation between surface and air temperature at scales from 500 to 1000 m and modulated the spatial variance of sensible heat flux. This suggests that feedback effects act to limit the spatial variability in fluxes, and ignoring them will cause the largest errors at the extremes.
ISSN:0143-1161
1366-5901
DOI:10.1080/01431160802036383