以涡度相关法的实测资料为标准,对波文比—能量平衡法、空气动力学法、Penman-Monteith模型、Shuttleworth-Wallace模型进行对比研究,并分析了各种方法的精度和灵敏度。结果表明:Penman-Monteith模型和波文比—能量平衡法的精度最高,Shuttleworth-Wallace模型和空气动力学法的精度较差。Penman-Monteith模型的稳定性较好,波文比—能量平衡法受Δe和ΔT观测精度的影响大,风温湿观测高度以及下垫面是否均一对空气动力学法影响较大,Shuttleworth-Wallace模型对各类阻抗较为敏感。

Based on the observational data of eddy correlation method,we validate some methods for estimating latent heat flux,which include Bowen-ratio method,aerodynamics method,Penman-Monteith model and Shuttleworth-Wallace model.Analysis of the performance and sensitivity of these models shows that Penman -Monteith model and Bowen -ratio method are the best in performance,while Shuttleworth-Wallace model and aerodynamics method are the worst.Penman-Monteith model is not sensitive to the uncertainty in these model parameters.The measured precision ofΔe andΔT affect the performance of Bowen -ratio method greatly,while the observation height of wind,temperature,humidity and heterogeneous surfaces affect the performance of aerodynamics method greatly.Shuttleworth-Wallace model is sensitive to surface resistances.