02275naa a2200325 a 450000100080000000500110000800800410001910000250006024501050008526000090019050001280019952011960032765000150152365000200153865000090155865000150156765300180158265300200160065300300162065300200165065300220167065300190169265300210171165300230173265300430175570000200179870000180181870000200183677300930185616615672018-06-22       2009    bl uuuu     u00u1 u    #d1 aSANTOS, C. A. C. dos  aEnergy balance measurements over a banana orchard in the Semiarid region in the Northeast of Brazil.  c2009  aTítulo em português: Medidas do balanço de energia sobre pomar de bananeira na região Semiárida do Nordeste do Brasil.  aThe objective of this work was to evaluate the reliability of eddy covariance measurements, analyzing the energy balance components, evapotranspiration and energy balance closure in dry and wet growing seasons, in a banana orchard. The experiment was carried out at a farm located within the irrigation district of Quixeré, in the Lower Jaguaribe basin, in Ceará state, Brazil. An eddy covariance system was used to measure the turbulent flux. An automatic weather station was installed in a grass field to obtain the reference evapotranspiration (ET0) from the combined FAO-Penman-Monteith method. Wind speed and vapor pressure deficit are the most important variables on the evaporative process in both growing seasons. In the dry season, the heat fluxes have a similar order of magnitude, and during the wet season the latent heat flux is the largest. The eddy covariance system had acceptable reliability in measuring heat flux, with actual evapotranspiration results comparing well with those obtained by using the water balance method. The energy balance closure had good results for the study area, with mean values of 0.93 and 0.86 for the dry and wet growing seasons respectively.  aDry season  aEddy covariance  aMusa  aWet season  aCalor latente  aCalor sensível  aCorrelações turbulentas  aEddy cavariance  aEstação chuvosa  aEstação seca  aLatent heat flux  aSensible heat flux  aTécnica das correlações turbulentas1 aSILVA, B. B. da1 aRAO, T. V. R.1 aNEALE, C. M. U.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 44, n. 11, p. 1365-1373, nov. 2009.