Estimation of evaporation using the surface energy balance system (SEBS) and numerical models

Ali Ershadi, M. F. Mccabe, J. P. Evans, J. P. Walker, Robert Pipunic

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

Abstract

This study estimates evaporation using the Surface Energy Balance System (SEBS) method over an agricultural region in the Murrumbidgee Irrigation Area of NSW, Australia. Evaporation is estimated as latent heat flux using the standard Monin-Obukhov Similarity Theory (MOST) equations of SEBS and meteorological observations form an eddy-covariance system. Landsat and MODIS satellite data coincident with the period of in-situ flux measurements are used to examine the spatial variability of evaporation measurements. To extend the investigation, atmospheric forcing data from recent simulations of the Weather Research and Forecasting (WRF) model are used. A comparison at the point scale is made between observed eddy-covariance, modeled WRF predictions, and calculated SEBS values. In addition, the spatial variability of evaporation from the Landsat and MODIS images are compared against WRF results. Results show good estimation of the sensible heat flux using Landsat, MODIS, and WRF data, but estimation of the latent heat flux are not comparable with observations due to non-closure issues.

Original languageEnglish
Title of host publication34th International Symposium on Remote Sensing of Environment
Subtitle of host publicationThe GEOSS Era: Towards Operational Environmental Monitoring
PublisherInternational Society for Photogrammetry and Remote Sensing (ISPRS)
Pages1-4
Number of pages4
Publication statusPublished - 2011
EventInternational Symposium on Remote Sensing of Environment (ISRSE) 2011 - Sydney, Australia
Duration: 10 Apr 201115 Apr 2011
Conference number: 34th

Conference

ConferenceInternational Symposium on Remote Sensing of Environment (ISRSE) 2011
Abbreviated titleISRSE 2011
CountryAustralia
CitySydney
Period10/04/1115/04/11
OtherThe GEOSS Era: Towards Operational environmental Monitoring
April 10-15, 2011
Sydney, Australia

Keywords

  • Evapotranspiration
  • NWP
  • Remote sensing
  • SEBS
  • Thermal images
  • WRF

Cite this

Ershadi, A., Mccabe, M. F., Evans, J. P., Walker, J. P., & Pipunic, R. (2011). Estimation of evaporation using the surface energy balance system (SEBS) and numerical models. In 34th International Symposium on Remote Sensing of Environment : The GEOSS Era: Towards Operational Environmental Monitoring (pp. 1-4). International Society for Photogrammetry and Remote Sensing (ISPRS). http://www.isprs.org/proceedings/2011/ISRSE-34/211104015Final00681.pdf