DYNAMICS OF HEAT FLUXES BY BOWEN AND MATMNXFLX AND NOAH FLDAS PRODUCTS IN THE PANTANAL OF MATO GROSSO - BRAZIL/DINAMICA DOS FLUXOS DE CALOR POR BOWEN E PRODUTOS MATMNXFLX E FLDAS NOAH NO PANTANAL MATO-GROSSENSE

This paper aimed to analyze the dynamics of the energy budget components: latent heat flux (LE), sensible heat flux (H) and soil heat flux (G), in the Mato Grosso Pantanal. The estimates of LE, H, and G were obtained by the Bowen ratio methods, using data from the micrometeorological tower located in the Bafa das Pedras Park of SESC-Pantanal Ecological Resort, for the years 2011 to 2013. The normality of the variables Rn, LE, H and G, were tested by Kolmogorov-Smirnov test at 5% significance, and the seasonal differences of the fluxes were verified by the Kruskal-Wallis test, [alpha] = 0.05. LE and H data from the remote sensing products MATMNXFLX and FLDAS_NOAH of the MERRA model was also acquired, and their comparison with the tower data was performed by the statistics of Spearman correlation (r), Mean Absolute Error (MAE), Root Mean Squared Erro (RMSE), bias, and Willmott's Concordance Index (d). It was observed that most of the available energy is used for evapotranspiration (latent heat), followed by sensible heat and soil heat flux. In the rainy season there is an increase in the partition of LE and G and reduction of H. Only the estimates of LE of MATMNXFLX and FLDAS_NOAH products correlate with the data observed in the meteorological tower. It is concluded that the energy partitions have a seasonal behavior and that the MATMNXFLX and FLDAS_NOAH products, after being calibrated, can be used to estimate LE in the Mato Grosso Pantanal. Keywords: Bowen's Ratio; net radiation; Wetlands; Seasonality; Remote Sensing. Analisou-se a dinamica das componentes do saldo de radiacao (Rn) destinadas aos fluxos de calor latente (LE), sensivel (H) e fluxo de calor no solo (G) no Pantanal Mato-Grossense. As estimativas do LE, H e G foram obtidas pelos metodos da razao de Bowen por meio de dados da torre micrometeorologica localizada no Parque Baia das Pedras da Estancia Ecologica SESC-Pantanal, durante os anos de 2011 a 2013. Foram testadas a normalidade das variaveis Rn, LE, H e G, por meio do teste de Kolmogorov-Smirnov a 5% de significancia, e a diferenca sazonal dos fluxos foi verificada pelo teste de Kruskal-Wallis, [alpha]= 0.05. Foram ainda adquiridos dados de LE e H dos produtos de sensoriamento remoto MATMNXFLX e FLDAS NOAH do modelo MERRA e sua comparagao com os dados da torre foi realizado pelas estatistica da Correlacao de Spearman (r), Erro Medio Absoluto (MAE), Raiz do Erro Quadratico Medio (RMSE), vies e Indice de Concordancia de Willmott (d). Observo