Energy Balance in a Patch of the Atlantic Forest in São Paulo City, Brazil


The aim of this work was to characterize and to bring into relationship of the net radiation with the latent heat flux equivalent to water (mm) in a patch of Atlantic Forest within the metropolitan area of Sao Paulo (RMSP). The estimation of the latent heat flux (LE) was made by the energy balance equation with the Bowen ratio. Measurements of net radiation and psychometrics gradients were made. Soil heat flux (G) was measured by temperature sensors in two depths. Measurements were made at Park of Science and Technology of Sao Paulo University (CIENTEC), Sao Paulo, Brazil, between 2011 and 2013. Results indicated that evapotranspiration varies seasonally and the amount of water evaporated exceeds 3.0 mm·day-1 in spring/summer and in autumn/winter the amount is approximately 1.0 mm·day-1. The evapotranspiration is increased under RMSP urban climate conditions with higher air temperature and lower moisture especially in summer season.

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Funari, F. and Filho, A. (2014) Energy Balance in a Patch of the Atlantic Forest in São Paulo City, Brazil. Journal of Water Resource and Protection, 6, 805-812. doi: 10.4236/jwarp.2014.69076.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Pereira Filho, A.J., Marques dos Santos, P. and Xavier, T.M.B.S. (2007) Evolucao do Tempo e do Clima na Regiao Metropolitana de Sao Paulo. IAG-USP, Sao Paulo, 282.
[2] Thornthwaite, C.W., Wilm, H.G., et al. (1994) Report of the Committee on Evaporation and Transpiration from 1943 to 1944. Transactions—American Geophysical Union, 5, 687.
[3] Thornthwaite, C.W. (1948) On the Approach toward a Rational Classification of Climate. Geographical Review, 38, 55-94.
[4] Berlato, M. and Molion, L.C.B. (1981) Evaporation and Evapotranspiracao. Bulletin IPAGRO, 7, 3-96.
[5] Lombardo, M.A. (1985) Ilha de calor nas metropoles—O exemplo de Sao Paulo. Editora Hucitec com apoio de Lalekla S.A. Comercio e Industria, 244.
[6] Garcia Occhipinti, A. and Marques dos Santos, P. (1965) Analise das maximas intensidade de chuva na cidade de Sao Paulo. IAG-USP, Sao Paulo, 41.
[7] Thornthwaite, C.W. and Mather, J.R. (1955) The Water Balance. Laboratory of Climatology, Centerton.
[8] Penman, H.L. (1948) Natural Evaporation from Open Water, Bare Soil and Grass. Proceedings of the Royal Society A, London, 193, 120-145.
[9] Penman, H.L. (1956) Evaporation an Introductory Survey. Netherlands Journal of Agricultural Science, 4, 9-29.
[10] Bavel, C.H.M. (1956) A Nomogram to Estimate Maximum Evapotranspiration. North Carolina State College, Raleigh.
[11] Blaney, H.F. and Criddle, W.D. (1950) Determining Requirements Water in Irrigated Areas from Climatological and Irrigation Data. Washington Soil Conservation Service, 48.
[12] Bowen, I.S. (1926) The Ratio of Heat Losses by Conduction and by Evaporation from Any Water Surface. Physical Review, 27, 779-787.
[13] Fritschen, L.J. (1966) Evapotranspiration Rates of Field Crops Determinated by Bowen Ratio Method. Agronomy Journal, 58, 339-342.
[14] Camargo, A.P. (1961) Contribution to the Determination of Potential Evapotranspiration in the State of Sao Paulo. Doctoral Thesis, ESALQ-USP, Sao Paulo.
[15] Camargo, A.P. (1962) Contribution to the Determination of Evapotranspiration in the State of Sao Paulo. Bragantia, 21, 163-213.
[16] Camargo, A.P. (1978) Water Balance in State of Sao Paulo. Bulletin, 116, Agricultural Institute—Campinas-SP, 28.
[17] Nova, N.A.V. (1973) Studies on the Energy Balance in Rice Culture. Thesis Habilitation, ESALQ-USP, Sao Paulo, 89.
[18] Sa, L.D.A., Manzi, A.O. and Viswanandham, Y. (1986) A Comparison of Bowen Ratio Estimates Obtained by Different Methods in the Amazon Rain Forest. IV Brazilian Congress of Meteorology—Rio de Janeiro-RJ, Proceedings II, 216-222.
[19] Gielow, R., Santos, R.C.S., Santos, J.M. and Viswanandham, Y. (1990) Bowen Ratio Condition for Advection on Rain Forest. VI Brasilian Congress of Meteorology, Salvador-BA, Annals, 383-387.
[20] Paiva, C.M., Liu, W.T.H. and France, G.B. (2000) Determination of Crop Evapotranspiration of Wheat by Energy Balance—Bowen Ratio Method to Londrina-PR. XI—Brazilian Congress of Meteorology, Rio de Janeiro-RJ, Annals, 159-164.
[21] Cunha, A.R., Escobedo, J.F. and Klosowski, E.S. (2002) Estimation of the Latent Heat Flux by the Energy Balance in Protected Pepper Cultivation. Brazilian Agricultural Research, 37, 735-747.
[22] Boueri, M.A. (2007) Estimation of Crop Evapotranspiration of Tagetes patula by the Bowen Ratio Method in Greenhouse and Field. Thesis, Universidade Estadual Paulista, Botucatu.
[23] Biudes, M.S., Valentini, C.M., Campelo Jr., A.J.H. and Nogueira, J.S. (2008) Estimation of Evapotranspiration in a Mixed Landscape of Savanna Conditions the Method of Bowen Ratio and Penman—Monteith. Science and Natura, UFSM, 30, 71-86.
[24] Silva, A.F., Pereira, R.I., Machado, W.B. and Silva, R. (2010) Energy Flows in Agriculture and f in the Amazon. 1st International Seminar on Science Environmental Sustainability of the Amazon, UFAM.
[25] Oliveira, A.S. (1971) Comparative Studies of Potential Evapotranspiration Estimated by Tanks and by Penman. Thesis Free-Teaching, Escola Superior de Agricultura Luiz de Queiroz, USP, Piracicaba, 90.
[26] Armani, G. (2004) Interactions between Atmosphere and Land Surface. Master’s Dissertation, DG-FFLCH-USP, 198.
[27] Armani, G. (2009) Analysis and Top Three-Dimensional Microclimate of a Watershed Humid Tropical Climate of Altitude. Doctoral Thesis, DG-FFLCH-USP.
[28] Armani, G. and Galvani, E. (2006) Performance Evaluation of a Weather Shelter Low Cost. Brazilian Journal of Agrometeorology, 14, 34-40.
[29] Meteorological Service Navy—Navy of Brazil (2011-2013) Synoptic Letters.
[30] Funari, F.L. and Filho, A.J.P. (2010) Comparative Analysis of Meteorological Variables Measurements Made by Conventional and Automatic Weather Stations in the Parque Estadual das Fontes do Ipiranga, Sao Paulo-SP. Brazilian Journal of Climatology, 7, 159-167.
[31] Funari, F.L. (2013) Research Report. LabHidro-IAG-USP, 41.
[32] Funari, F.L. and Filho, A.J.P. (2014) The Determination of the Heat Flux in the Soil, Using Data of Soil Temperature In the Parque Estadual das Fontes do Ipiranga, Sao Paulo-SP. (To Be Published)
[33] Mota, F.S. (1977) Meteorologia Agricola. Editora Nobel, 376.
[34] Funari, F.L. and Filho, A.J.P. (2014) Comparisons between Measurements of Temperature and Relative Humidity, Obtained in a Shelter for Low Cost Passive Ventilation and a Standard Weather Shelter. (In the Final Stage of Writing)
[35] Ferreira, W.A. (1972) Use of Evaporation Piche to Estimate the Potential Evapotranspiration. Doctoral Thesis, Universidade Estadual Paulista, Botucatu, 72.
[36] Filho, A.J.P., Massambani, O., Lobo, G.A. and Castilhano, L.L. (2002) Water Balance of the Hydrographical Basin of IAG. In: Bicudo, D.C., Forti, M.C. and Bicudo, C.E.M., Eds., Parque Estadual das Fontes do Ipiranga, Org. Secretaria do Meio Ambiente, Estado de Sao Paulo, 351.
[37] Molion, L.C.B. (1987) Micrometeorology of the Amazonian Rain Forest. In: Dickinson, R.E., Ed., Geophysiology of Amazonian: Vegetation and Climate Interactions, Wiley and Sons, Hoboken, 255-270.
[38] De Souza, R.L.M., Filho, E.P.M., Filho, O.C.R., Mesquita, F.L.L., Karam, H.A. and Sa, L.D.A. (2009) Estudo do balanco de energia superficial do Pantanal Sul Mato-grossense durante o periodo Seco e umido. 2nd Simposio de Geotecnologia no Pantanal, Corumba, 7-11 November 2009, 314-322.

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