期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2007
卷号：XXXVI-7/C50
出版社：Copernicus Publications
摘要：The relationship between skin temperature and vegetation fraction impacts the variation of evapotranpiration, which is influenced by moisture availability on the surface and vice versa. The skin surface temperature varies with vegetation amount, land cover types, precipitation, topographical differences, soil types and texture. Complex interactions between them determine the relationship between skin temperature and vegetation fraction and hence the evapotranspiration. Of the factors that influence the land surface-atmosphere interactions, water content in vegetation is investigated to determine the possibility of model improvement. Vegetation water content, which is differently controlled by vegetation type, is parameterized into the model by studying its variation with land cover types as well as with the moisture conditions on the surface. Oklahoma in the central U.S. is selected as the study area because it shows variation of vegetation, from bare soil to fully vegetated, and of surface temperature and soil moisture. The simulated variables are compared to the MODIS remote sensing data and the Mesonet ground-based observation data. With the same spatial resolution of MODIS data, the model simulation is calibrated based on the observations provided by the Oklahoma Mesonet
