Effects of Averaging Period on Energy Fluxes and the Energy-Balance Ratio as Measured with an Eddy-Covariance System
作者： Junting Feng , Baozhong Zhang , Zheng Wei , Di Xu
DOI: 10.1007/S10546-017-0284-8
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摘要: The eddy-covariance method is an important technique for investigating the exchange of energy and substances between atmosphere ecosystem. However, inappropriate averaging period leads to inaccurate fluxes a low energy-balance ratio (EBR). effects various periods on EBR are analyzed using flux data from entire growth stage maize measured with system in northern China. We find that relative error 10–60 min commonly used 30 within 3%. When 10 60 min, magnitudes increase length at stages. For exceeding vary significantly, particularly longer than 120 min. In general, $${ EBR} > 0.8$$ field, tending but decreasing rapidly stages Ogive functions indicate optimal seedling–shooting shooting–heading approximately 10–30 heading–filling filling–maturity 30–60
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