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Revista Brasileira de Meteorologia

versão impressa ISSN 0102-7786versão On-line ISSN 1982-4351

Resumo

BIUDES, Marcelo Sacardi; CAMPELO JUNIOR, José Holanda; NOGUEIRA, José de Souza  e  SANCHES, Luciana. Estimate of energy balance in cambarazaland pasture in the north of Pantanal by Bowen ratio method. Rev. bras. meteorol. [online]. 2009, vol.24, n.2, pp.56-64. ISSN 1982-4351.  https://doi.org/10.1590/S0102-77862009000200003.

The energy balance study of a vegetated surface and atmosphere is important to characterize the local microclimate, identify interactions among environmental variables and the vegetation and to identify anthropogenic activities effects. The objective of this work was estimate the seasonality of energy balance by Bowen ratio method in a monodominant vegetation of Cambará area in the RPPN SESC-Pantanal and a pasture area in UFMT's Experimental Farm. The energy balance components presented seasonality, with larger averages at the rainy station in two areas of study. In the cambarazal was a higher variation of the latent heat flux of the dry season for the rainy season that in the pasture. However, the seasonal variation of the sensible heat flux in the cambarazal was lower than in the pasture, due to the thermo-regulatory effect in the cambarazal, according to the largest biomass. The available energy at two ranches was partitioned priority in latent heat flux, 80,0% in the cambarazal and 56,6% in the pasture, followed by the sensible heat flux, 19,1 and 42,9%, and by the soil heat flux, 0,3 and 7,2%.

Palavras-chave : Bowen ratio; seasonality; tropical forest; microclimate.

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