Particular uncertainties encountered in using a pre-packaged SEBS model to derive evapotranspiration in a heterogeneous study area in South Africa
作者： LA Gibson , Z Münch , J Engelbrecht , None
关键词:
摘要: Abstract. The focus of this paper is on the pre-packaged version SEBS in ILWIS and sensitivity to some parameters over which user has control when using model, order make informed choices limit uncertainties. sensitivities input are related daily ET rather than energy flux results since interest water managers other users model. This describes uncertainties introduced by model (a) land surface temperature air gradient, (b) choice fractional vegetation formula, (c) displacement height at wind speed measured, (d) study area heterogeneity. It was shown that sensitive gradient magnitude depended cover whether or not wet-limit had been reached. formula influence up 0.7 mm. canopy should be considered relation weather station reference avoid sensible heat from becoming unsolvable due a negative ln calculation. Finally heterogeneous although resolution fluxes were calculated did significantly impact partitioning results. differences upscaling evaporative fraction varying resolutions observed implies heterogeneity may play biggest role albedo calculation studied.
harvard.edu
hydrol-earth-syst-sci.net参考文章(30)
Wilfried Brutsaert, Evaporation into the atmosphere ,(1982)
R. van der Velde, Zhongbo Su, Wenjing Lin, SATELLITE BASED REGIONAL-SCALE EVAPOTRANSPIRATION IN THE HEBEI PLAIN, NORTHEASTERN CHINA ESASP. ,vol. 655, pp. 19- ,(2008)
Folke Olesen, Isabel Trigo, Prasanjit Dash, Cristina Madeira, INTERCOMPARISON OF METEOSAT-8 DERIVED LST WITH MODIS AND AATSR SIMILAR PRODUCTS ,(2005)
Zhongbo Su, G.J. Roerink, Drought risk reduction Alterra-rapport. ,vol. 1135, ,(2004)
Andrew N. French, Thomas J. Schmugge, William P. Kustas, Kaye L. Brubaker, John Prueger, Surface energy fluxes over El Reno, Oklahoma, using high‐resolution remotely sensed data Water Resources Research. ,vol. 39, pp. 1164- ,(2003) , 10.1029/2002WR001734
Toby N. Carlson, David A. Ripley, On the relation between NDVI, fractional vegetation cover, and leaf area index Remote Sensing of Environment. ,vol. 62, pp. 241- 252 ,(1997) , 10.1016/S0034-4257(97)00104-1
Matthew F. McCabe, Eric F. Wood, Scale influences on the remote estimation of evapotranspiration using multiple satellite sensors Remote Sensing of Environment. ,vol. 105, pp. 271- 285 ,(2006) , 10.1016/J.RSE.2006.07.006
S. Garrigues, D. Allard, F. Baret, M. Weiss, Quantifying spatial heterogeneity at the landscape scale using variogram models Remote Sensing of Environment. ,vol. 103, pp. 81- 96 ,(2006) , 10.1016/J.RSE.2006.03.013
Bhaskar J. Choudhury, Relationships between vegetation indices, radiation absorption, and net photosynthesis evaluated by a sensitivity analysis Remote Sensing of Environment. ,vol. 22, pp. 209- 233 ,(1987) , 10.1016/0034-4257(87)90059-9
Isabella Mariotto, Vincent P. Gutschick, Non-Lambertian Corrected Albedo and Vegetation Index for Estimating Land Evapotranspiration in a Heterogeneous Semi-Arid Landscape Remote Sensing. ,vol. 2, pp. 926- 938 ,(2010) , 10.3390/RS2040926