DOI: 10.5194/hess-23-925-2019
论文题名: Potential evaporation at eddy-covariance sites across the globe
作者: Maes W.H. ; Gentine P. ; Verhoest N.E.C. ; Miralles D.G.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2019
卷: 23, 期: 2 起始页码: 925
结束页码: 948
语种: 英语
Scopus关键词: Drought
; Evaporation
; Evapotranspiration
; Soil moisture
; Water supply
; Atmospheric conditions
; Eddy covariance measurements
; Hydrological forecasting
; In-situ measurement
; Multiple interpretations
; Potential evaporation
; Relative performance
; Stomatal conductance
; Ecosystems
; biome
; drought
; eddy covariance
; energy balance
; evaporation
; global perspective
; soil water
; stomatal conductance
; terrestrial ecosystem
英文摘要: Potential evaporation (E pE pevapotranspiration ) that the actual ecosystem would attain if it were to evaporate at maximal rate for the given atmospheric conditions. We use eddy-covariance measurements from the FLUXNET2015 database, covering 11 different biomes, to parameterise and inter-compare the most widely used E pE pĝ'1 ; and bias of ĝ'0.02 mm dayĝ'1 ). A Priestley and Taylor method, calibrated per biome, performed just slightly worse, yet substantially and consistently better than more complex Penman-based, Penman-Monteith-based or temperature-driven approaches. We show that the poor performance of Penman-Monteith-based approaches largely relates to the fact that the unstressed stomatal conductance cannot be assumed to be constant in time at the ecosystem scale. On the contrary, the biome-specific parameters required by simpler radiation-driven methods are relatively constant in time and per biome type. This makes these methods a robust way to estimate E p Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163047
Appears in Collections: 气候变化与战略
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作者单位: Maes, W.H., Laboratory of Hydrology and Water Management, Ghent University, Coupure Links 653, Gent, 9000, Belgium; Gentine, P., Department of Earth and Environmental Engineering, Columbia University, New York City, NY 10027, United States; Verhoest, N.E.C., Laboratory of Hydrology and Water Management, Ghent University, Coupure Links 653, Gent, 9000, Belgium; Miralles, D.G., Laboratory of Hydrology and Water Management, Ghent University, Coupure Links 653, Gent, 9000, Belgium
Recommended Citation:
Maes W.H.,Gentine P.,Verhoest N.E.C.,et al. Potential evaporation at eddy-covariance sites across the globe[J]. Hydrology and Earth System Sciences,2019-01-01,23(2)