Energy balance measurements over a banana orchard in the Semiarid region in the Northeast of Brazil

被引:3
|
作者
Costa dos Santos, Carlos Antonio [1 ]
da Silva, Bernardo Barbosa [2 ]
Rao, Tantravahi Venkata Ramana [2 ]
Neale, Christopher Michael Usher [3 ]
机构
[1] Inst Nacl de Pesquisas da Amazonia, BR-69060001 Manaus, Amazonas, Brazil
[2] Univ Fed Campina Grande, Unidade Acad Ciencias Atmosfer, BR-58109970 Campina Grande, PB, Brazil
[3] Utah State Univ, Biol & Irrigat Engn Dept, Logan, UT 84322 USA
关键词
Musa; dry season; eddy covariance; latent heat flux; sensible heat flux; wet season; FLUX MEASUREMENTS; LARCH FOREST; WATER-VAPOR; EVAPOTRANSPIRATION; CLOSURE; BUDGET; TRANSPIRATION; HEAT;
D O I
10.1590/S0100-204X2009001100001
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
The 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 Quixere, in the Lower Jaguaribe basin, in Ceara 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.
引用
收藏
页码:1365 / 1373
页数:9
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