Articles | Volume 23, issue 12
Hydrol. Earth Syst. Sci., 23, 4891–4907, 2019

Special issue: Understanding and predicting Earth system and hydrological...

Hydrol. Earth Syst. Sci., 23, 4891–4907, 2019

Research article 29 Nov 2019

Research article | 29 Nov 2019

Spatial variability of mean daily estimates of actual evaporation from remotely sensed imagery and surface reference data

Robert N. Armstrong et al.

Data sets

Evaporation modelling gridded data and meteorological station data for a case study at a rolling prairie landscape at St. Denis National Wildlife Area, Saskatchewan, Canada R. Armstrong, J. Pomeroy, and M. Lawrence

Short summary
Digital and thermal images taken near midday were used to scale daily point observations of key factors driving actual-evaporation estimates across a complex Canadian Prairie landscape. Point estimates of actual evaporation agreed well with observed values via eddy covariance. Impacts of spatial variations on areal estimates were minor, and no covariance was found between model parameters driving the energy term. The methods can be applied further to improve land surface parameterisations.