Evaluation of two models using CERES data for reference evapotranspiration estimation


  • F. Carmona Instituto de Hidrología de Llanuras “Dr. Eduardo J. Usunoff”; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
  • M. Holzman Instituto de Hidrología de Llanuras “Dr. Eduardo J. Usunoff”; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
  • R. Rivas Instituto de Hidrología de Llanuras “Dr. Eduardo J. Usunoff”; Comisión de Investigaciones Científicas (CIC)
  • M.F. Degano Instituto de Hidrología de Llanuras “Dr. Eduardo J. Usunoff”; Comisión de Investigaciones Científicas (CIC)
  • E. Kruse Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
  • M. Bayala Instituto de Hidrología de Llanuras “Dr. Eduardo J. Usunoff”; Comisión de Investigaciones Científicas (CIC)




CERES, remote sensing, reference evapotranspiration


Evapotranspiration is the most important variable in the Pampas plain. Information provided by sensors onboard satellite missions allows represent the spatial and temporal variability of evapotranspiration, which cannot be achieved using only measurements of weather stations. In this work, the Priestley and Taylor (PT) and FAO Penman Monteith (FAO PM) equations were adapted to estimate the reference evapotranspiration, ET0 , using only CERES satellite products (SYN1 and CldTypHist). In order to evaluate the reference evapotranspiration from CERES, a comparison with in situ measurements was conducted. We used ET data provided by the Oficina de Riesgo Agropecuario, corresponding to 24 stations placed in the Pampean Region of Argentina (2001-2016). Results showed very good agreement between the estimates with CERES products and in situ values, with errors between"‰±0.8 and"‰±1.1 mm d–and r2  greater than 0.75  at daily scale, and errors between"‰±14  and"‰±19  mm month–1  and r2   greater than 0.9, at monthly scale better results were obtained with adapted model FAO PM than PT. Finally, ET0 monthly maps for the Pampean Region of Argentina were elaborated, which allowed knowing the temporal-spatial variation in the validation area. In conclusion, the methods presented here are a suitable alternative to estimate the reference evapotranspiration without requiring ground measurements.


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Author Biography

F. Carmona, Instituto de Hidrología de Llanuras “Dr. Eduardo J. Usunoff”; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)



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