Estimativa da Radiação de Onda Longa Incidente em uma Floresta Semidecídua Tropical da Bacia Amazônica

Maricéia Tatiana Vilani, Luciana Sanches, Mariele Regina Pinheiro, Osvaldo Borges Pinto Junior

Abstract


The present work aims to quantify long-wave radiation incidentby the Brunt (1932), Brutsaert (1975), Idso and Jackson (1969), Satterlund(1979), Swinbank (1963) and Prata (1996) methods, consideringclassification of sky conditions to a tropical semi-deciduos forest of thesouthern amazon basin in northern Mato Grosso, Brazil, from 2007 to 2008. The sky conditions were defined by clearness index (L↓) (cloudy,partly cloudy and clear). Average annual of long-wave radiation incident(L↓) was higher when estimated by the Satterlund method (381.18 ± 36.49W m-2), and by the Brutsaert method (380.17 ± 36.19 W m-2). There wasseasonality in daily cycle of long-wave radiation incident with higher valuesduring the daytime and lower during the night. L↓ estimated by theSwinbank and Idso & Jackson methods were correlated with air temperatureand humidity. Average annual of L↓ estimated by Brunt and Satterlundmethods differed of L↓ estimated by other methods.



DOI: https://doi.org/10.5902/2179460X9498

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