Determinação dos coeficientes da equação de Angstron para a região de Palotina, Estado do Paraná - DOI: 10.4025/actasciagron.v26i3.1831

Rivanildo Dallacort; Paulo Sergio Lourenço de Freitas; Antonio Carlos Andrade Gonçalves; Roberto Rezende; Altair Bertonha; Frederico Fonseca da Silva; Marcos Trintinalha

doi:10.4025/actasciagron.v26i3.1831

Determination of Angstron’s equation coefficients for the region of Palotina, Paraná state, Brazil - DOI: 10.4025/actasciagron.v26i3.1831

Rivanildo Dallacort UNEMAT
Paulo Sergio Lourenço de Freitas UEM
Antonio Carlos Andrade Gonçalves UEM
Roberto Rezende UEM
Altair Bertonha UEM
Frederico Fonseca da Silva UEM
Marcos Trintinalha UEM

DOI: https://doi.org/10.4025/actasciagron.v26i3.1831

Abstract

This work aimed at adjusting the Angstron’s equation coefficients, on monthly and annual basis, to the region of Palotina (24º17'S, 53º50'30'' W and 333m of altitude), Paraná, Brazil. The purpose was to determine the global solar radiation on a daily basis. Climatic data of global solar radiation and total daily sunshine, from 1982 to 2002 were used to fit the equation. Lower values (7,82MJ m^-2) of global solar radiation were verified at months with north solar declination and higher values (22,07MJ m^-2) at months with south solar declination, with annual mean value of 14,27MJ m^-2. The radiation that reached the atmosphere top presented similar annual trend, with a lowest value of 21,58MJ m^-2 on June 24^th and highest value of 44,51MJ m^-2 on January 1^st. Annual mean value was of 33,45MJ m^-2. Higher value of insolation ratio were obtained in the winter and lower values occurred in the summer, ranging from 0,13 to 0,97, with 0,58 as a mean value. The brightness index ranged from 0,32 to 0,55, and 0,55 constitute the maximum brightness index for the region of Palotina, Paraná

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Author Biography

Rivanildo Dallacort, UNEMAT

Graduação em Engenharia Agrícola pela Universidade Estadual do Oeste do Paraná (2003) Mestrado em Agronomia pela Universidade Estadual de Maringá (2004) Doutorado em Agronômia pela Universidade Estadual de Maringá (2006) Atualmente é: - Professor titular da Universidade do Estado de Mato Grosso - Membro Comitê Científico Universidade do Estado de Mato Grosso Atuante na área de Engenharia Agrícola, atuando principalmente nos seguintes temas: agrometeorologia, modelagem agrometeorológica, soja, feijão, modelos de simulação, balanço da água no solo, irrigação, recursos hídricos e meio ambiente Currículo Lattes

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Published

2008-04-11

How to Cite

Dallacort, R., Freitas, P. S. L. de, Gonçalves, A. C. A., Rezende, R., Bertonha, A., Silva, F. F. da, & Trintinalha, M. (2008). Determination of Angstron’s equation coefficients for the region of Palotina, Paraná state, Brazil - DOI: 10.4025/actasciagron.v26i3.1831. Acta Scientiarum. Agronomy, 26(3), 329-336. https://doi.org/10.4025/actasciagron.v26i3.1831

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Issue

Vol 26 No 3 (2004)

Section

Agronomy

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