Silva, Cícero Lopes da; Oliveira, Carlos Alberto da Silva

Oliveira Júnior, Manuel Pereira de

26-Jan-2010

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Boschin, Ana Paula Masson; Silva, Cicero Lopes da; Oliveira, Carlos Alberto da Silva; Oliveira Júnior, Manuel Pereira de; Miranda, Martha Zavariz de; Fagioli, Marcelo

8-Jun-2011

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The objective of this work was to estimate Angström-Prescott equation mean coefficients in Brasília, DF, Brazil, and their effects on the calculations of global radiation (Rs) and reference crop evapotranspiration (ETo). It was used meteorological data from Embrapa Hortaliças weather station, from 1978 to 2003. The mean coefficients were determined by linear regression analysis considering monthly, annual and total periods. Using the calculated coefficients for different periods and those provided by FAO (0.25 and 0.50), Rs and ETo were estimated and their performances were evaluated. Monthly mean coefficient a varied from 0.241 to 0.345, and b from 0.430 to 0.515. Annual mean coefficients a and b were 0.278 and 0.498, and total means were 0.282 and 0.490, respectively. These coefficients did not differ from each other on radiation estimates. The month of July provided the worse estimates and performance. When using calculated Rs estimates with monthly, annual, total and FAO coefficients, estimated values of ETo did not differ from observed ones, providing excellent performance, despite the mean coefficient used. Depending on the final application, it is suggested the use of total mean coefficients due to their easiness to estimate the shortwave radiation.

Dornelas, Karla Daniele e Silva; Silva, Cícero Lopes da; Oliveira, Carlos Alberto da Silva

30-Mai-2011

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Lima, Jorge Enoch Furquim Werneck; Silva, Cícero Lopes da; Oliveira, Carlos Alberto da Silva

31-Mai-2011

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Oliveira, Carlos Alberto da Silva

Mera, Ana Carolina

8-Mar-2010

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Alencar, Danielle B. S. de; Silva, Cícero Lopes da; Oliveira, Carlos Alberto da Silva

30-Mai-2011

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Pinto, Jacques M.; Silva, Cícero Lopes da; Oliveira, Carlos Alberto da Silva

27-Mai-2011

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Oliveira, Carlos Alberto da Silva

Evangelista, William

1-Dez-2009

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Oliveira, Carlos Alberto da Silva

Grenho, Ana Isabel Santos

1-Dez-2009

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Liz, Ronaldo Setti de; Calbo, Adonai Gimenez; Carrijo, Osmar Alves; Oliveira, Carlos Alberto da Silva

6-Jun-2011

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Costa, Wanderley Andrade; Oliveira, Carlos Alberto da Silva; Kato, Eiyti

12-Mai-2011

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Oliveira, Carlos Alberto da Silva; Silva, Cícero Lopes da

França, Cibele Dutra de

28-Set-2011

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Oliveira, Carlos Alberto da Silva

Moreira, Jonathas de Alencar

22-Jun-2011

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Faggion, Francisco; Oliveira, Carlos Alberto da Silva; Christofidis, Demétrios

31-Mai-2011

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Evangelista, William; Oliveira, Carlos Alberto da Silva; Silva, Cícero Lopes da

30-Mai-2011

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