Estimation of heat and momentum fluxes over complex terrain using a large aperture scintillometer

被引:61
作者
Chehbouni, A [1 ]
Watts, C
Lagouarde, JP
Kerr, YH
Rodriguez, JC
Bonnefond, JM
Santiago, F
Dedieu, G
Goodrich, DC
Unkrich, C
机构
[1] IRD, IMADES, Hermosillo 83190, Sonora, Mexico
[2] INRA, Bordeaux, France
[3] CESBIO, Toulouse, France
[4] USDA ARS, Tucson, AZ USA
[5] CESBIO, CNES, CNRS, IRD,UPS, F-13401 Toulouse 4, France
关键词
area-average sensible heat flux; effective parameters; scintillometer; eddy covariance;
D O I
10.1016/S0168-1923(00)00187-8
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
A comprehensive experimental plan has been designed to further investigate the potential and the limitations associated with the use of a large aperture scintillometer (LAS) to infer path average sensible and momentum fluxes over complex surfaces as part of the Semi-Arid Land-Surface-Atmosphere (SALSA) program. The complexity of the terrain is associated with the type and the cover of the vegetation canopy as well as with changes in topography. Scintillometer based estimates of sensible heat flux and friction velocity are compared to those measured by eddy correlation systems over a grassland patch, a mesquite patch, and over a transect spanning both patches. The results show that considering the complexity of the surface, the overall performance of the scintillometer is relatively good. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:215 / 226
页数:12
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