Validation study of an overall radiation balance estimation method under Ponta Grossa (PR) Brazil weather conditions

Engenharia Agrícola

Gustavo C. Beruski²  André B. Pereira¹ 

[1] ,USP ESALQ Departamento de Engenharia de BiossistemasPiracicaba SP

关键词: overall radiation balance;    Bowen ratio;    global solar radiation;    modeling;    solar radiometry;    balanço geral de radiação;    razão de Bowen;    radiação solar global;    modelagem;    radiometria solar;   

DOI  :  10.1590/S0100-69162014000300010

来源: SciELO

【 摘 要 】

Radiation balance is the fraction of incident solar radiation upon earth surface which is available to be used in several natural processes, such as biological metabolism, water loss by vegetated surfaces, variation of temperature in farming systems and organic decomposition. The present study aimed to assess and validate the performance of two estimation models for Rn in Ponta Grossa city, Paraná State, Brazil. To this end, during the period of 04/01/2008 to 04/30/2011, from radiometric data collected by an automatic weather station set at the Experimental Station, of the State University of Ponta Grossa. We performed a linear regression study by confrontation between measurements made through radiometric balance and Rn estimates obtained from Brunt classical method, and the proposed method. Both models showed excellent performance and were confirmed by the statistical parameters applied. However, the alternative method has the advantage of requiring only global solar radiation values, temperature, and relative humidity.

【 授权许可】

CC BY   
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