globalchange  > 气候变化与战略
DOI: 10.1016/j.jhydrol.2020.124688
A global quantitation of factors affecting evapotranspiration variability
Author: Feng S.; Liu J.; Zhang Q.; Zhang Y.; Singh V.P.; Gu X.; Sun P.
Source Publication: Journal of Hydrology
ISSN: 221694
Publishing Year: 2020
Volume: 584
Language: 英语
Keyword: Attribution ; Budyko framework ; Climate change ; Different timescales ; Global evapotranspiration
Scopus Keyword: Catchments ; Evapotranspiration ; Runoff ; Water supply ; Attribution ; Budyko framework ; Catchment characteristics ; Climate seasonality ; Energy-constrained ; Hydrological response ; Potential evapotranspiration ; Time-scales ; Climate change ; catchment ; climate change ; evapotranspiration ; factor analysis ; global change ; hydrological response ; long-term change ; potential evapotranspiration ; timescale
English Abstract: Scientific viewpoints on the long-term hydrological responses to factors other than climatic change remain controversial and yet the impacts of these factors are often neglected at the short-term (such as monthly and annual) timescale. We developed an analytical method to decompose evapotranspiration (E) variability to the variability of precipitation (P), potential evapotranspiration (E0), total water storage change (ΔS), and catchment characteristics (n), such as vegetation, soil and climate seasonality. Global assessment showed that P enhanced E variability in most regions, while restrained E variability in some extremely humid regions. E0 controlled monthly E variability in most the energy-constrained regions. ΔS had much larger impacts on E variability at monthly scale compared to the annual scale, and restrained E variability in many arid regions (P/E0 < 0.66). Catchment characteristics had larger impacts on E variability in humid regions (P/E0 > 0.66), especially at annual scale. The dominant factors of E variability varied with timescales and regions. At a global scale, P and catchment characteristics are the dominant factors controlling global E variability at monthly and annual scales, respectively; In humid regions, however, the impacts of E0 on monthly E variability are generally larger than the impacts of precipitation and catchment characteristics. We highlight the necessity to consider the impacts of catchment characteristics even at the short-term timescales, otherwise the simulation and attribution of E variability would be significantly underestimated. © 2020 Elsevier B.V.
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被引频次[WOS]:1   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
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Affiliation: Laboratory of Critical Zone Evolution, School of Geography and Information Engineering, China University of Geosciences, Wuhan, 430074, China; Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education, Beijing Normal University, Beijing, 100875, China; State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, 100875, China; Faculty of Geographical Science, Academy of Disaster Reduction and Emergency Management, Beijing Normal University, Beijing, 100875, China; CSIRO Land and Water, GPO Box 1700, Canberra, ACT 2601, Australia; Department of Biological and Agricultural Engineering and Zachry Department of Civil Engineering, Texas A&M University, College Station, TX, United States; Department of Atmospheric Science, School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China; College of Geography and Tourism, Anhui Normal University, Anhui, 241000, China

Recommended Citation:
Feng S.,Liu J.,Zhang Q.,et al. A global quantitation of factors affecting evapotranspiration variability[J]. Journal of Hydrology,2020-01-01,584
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