Remote-Sensing Inversion Method for Evapotranspiration by Fusing Knowledge and Multisource Data

Table 1

Summary of commonly applied empirical regression methods.

Methods	Parameter meaning	References	Remark
	is daily evapotranspiration, mm· is daily net radiation flux, MJ· · is daily soil heat flux, MJ· · are ground surface temperature and the temperature at 1.5 meters above the ground surface, at 13:30–14:00 local time, °C; is lysimeter empirical parameters for regression of observed data	Jackson et al. [4]	(1)
	are radiated ground surface temperature and the temperature at 2 meters above the ground surface, at 13:00 local time, °C; and are calibration parameters based on surface roughness and atmospheric stability	Seguin et al.[5]	(2)
	are radiated ground surface temperature and the temperature at 50 meters above ground surface, at 13:00 local time, °C; is average overall conductivity of daily apparent heat flux; is correction parameters for non-neutral static stability	Carlson et al.[6]	(3)
	is daily reference evapotranspiration, mm· are parameters fitted using the PM formula based on local meteorological data	Rivas and Caselles [7]	(4)