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Theoretical and Applied Climatology

, Volume 129, Issue 1–2, pp 89–95 | Cite as

Estimating daily net radiation in the FAO Penman–Monteith method

  • Facundo CarmonaEmail author
  • Raúl Rivas
  • Eduardo Kruse
Original Paper

Abstract

In this work, we evaluate the procedures of the Manual No. 56 of the FAO (United Nations Food and Agriculture Organization) for predicting daily net radiation using measures collected in Tandil (Argentina) between March 2007 and June 2010. In addition, a new methodology is proposed for estimating daily net radiation over the reference crop considered in the FAO Penman–Monteith method. The calculated and observed values of daily net radiation are compared. Estimation errors are reduced from ±22 to ±12 W m−2 considering the new model. From spring–summer data, estimation errors of less than ±10 % were observed for the new physical model, which represents an error of just ±0.4 mm d−1 for computing reference evapotranspiration. The new model presented here is not restricted to a climate regime and is mainly appropriate for application in the FAO Penman–Monteith method to determine the reference crop evapotranspiration.

Keywords

Root Mean Square Error Longwave Radiation Mean Absolute Error Mean Bias Error Reference Crop 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This work was financed by CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas) and IHLLA (Instituto de Hidrología de Llanuras). The authors would also like to thank CIC (Comisión de Investigaciones Científicas de Buenos Aires), UNCPBA (Universidad Nacional del Centro de la provincia de Buenos Aires), and the anonymous reviewers who helped us to improve the manuscript.

Supplementary material

704_2016_1761_MOESM1_ESM.pdf (157 kb)
ESM 1 (PDF 156 kb)

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Copyright information

© Springer-Verlag Wien 2016

Authors and Affiliations

  1. 1.Instituto de Hidrología de Llanuras (IHLLA)Universidad Nacional del Centro de la Provincia de Buenos AiresTandilArgentina
  2. 2.Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)Buenos AiresArgentina
  3. 3.Comisión de Investigaciones Científicas (CIC)Buenos AiresArgentina

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