Upscaling instantaneous to daily evapotranspiration using modelled daily shortwave radiation for remote sensing applications: an artificial neural network approach
Résumé
Upscaling instantaneous evapotranspiration retrieved at any specific time-of-day (ETi) to daily evapotranspiration (ETd) is a key challenge in mapping regional ET using polar orbiting sensors. Various studies have unanimously cited the shortwave incoming radiation (RS) to be the most robust reference variable explaining the ratio between ETd and ETi. This study aims to contribute in ETi upscaling for global studies using the ratio between daily and instantaneous incoming shortwave radiation (RSd / RSi) as a factor for converting ETi to ETd.
Auteurs, date et publication :
Auteurs Loise Wandera , Kaniska Mallick , Gerard Kiely , Olivier Roupsard , Matthias Peichl , Vincenzo Magliulo
Publication : Hydrology and Earth System Sciences
Date : 2017
Volume : 21
Issue : 1
Pages : 197-215