DOI: 10.5194/hess-20-2195-2016
Scopus记录号: 2-s2.0-84973621964
论文题名: A two-parameter Budyko function to represent conditions under which evapotranspiration exceeds precipitation
作者: Greve P ; , Gudmundsson L ; , Orlowsky B ; , Seneviratne S ; I
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2016
卷: 20, 期: 6 起始页码: 2195
结束页码: 2205
语种: 英语
Scopus关键词: Climate change
; Water supply
; Annual evapotranspirations
; Annual precipitation
; Comprehensive assessment
; Potential evaporation
; Socio-economics
; Steady-state condition
; Terrestrial water storage
; Water availability
; Evapotranspiration
; annual variation
; aridity
; conceptual framework
; evapotranspiration
; precipitation assessment
; runoff
; seasonality
; water availability
; water budget
; water storage
英文摘要: A comprehensive assessment of the partitioning of precipitation (P) into evapotranspiration (E) and runoff (Q) is of major importance for a wide range of socio-economic sectors. For climatological averages, the Budyko framework provides a simple first-order relationship to estimate water availability represented by the ratio E/P as a function of the aridity index (EpP, with Ep denoting potential evaporation). However, the Budyko framework is limited to steady-state conditions, being a result of assuming negligible storage change in the land-water balance. Processes leading to changes in the terrestrial water storage at any spatial and/or temporal scale are hence not represented. Here we propose an analytically derived modification of the Budyko framework including a new parameter explicitly representing additional water available to evapotranspiration besides instantaneous precipitation. The modified framework is comprehensively analyzed, showing that the additional parameter leads to a rotation of the original water supply limit. We further evaluate the new formulation in an example application at mean seasonal timescales, showing that the extended framework is able to represent conditions in which monthly to annual evapotranspiration exceeds monthly to annual precipitation. © 2016 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78827
Appears in Collections: 气候变化事实与影响
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作者单位: Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland; Center for Climate Systems Modeling (C2SM), ETH Zurich, Zurich, Switzerland
Recommended Citation:
Greve P,, Gudmundsson L,, Orlowsky B,et al. A two-parameter Budyko function to represent conditions under which evapotranspiration exceeds precipitation[J]. Hydrology and Earth System Sciences,2016-01-01,20(6)