globalchange  > 影响、适应和脆弱性
DOI: 10.1002/jgrd.50224
论文题名:
Data-driven regionalization of river discharges and emergent land cover-evapotranspiration relationships across Sweden
作者: Van Der Velde Y.; Lyon S.W.; Destouni G.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期:6
起始页码: 2576
结束页码: 2587
语种: 英语
Scopus关键词: Agriculture ; Catchments ; Climate change ; Estimation ; Evapotranspiration ; Rivers ; Water quality ; Actual evapotranspiration ; Discharge measurements ; Energy-use efficiency ; Regional climate models ; Regionalization approaches ; River water quality ; Water balance components ; Water use efficiency ; Water supply ; climate change ; climate modeling ; data set ; evapotranspiration ; land cover ; precipitation (climatology) ; river discharge ; river water ; water budget ; water quality ; Sweden
英文摘要: [1] Changes in river discharge and river water quality, due to climate change and other drivers such as land cover change, pose both societal and ecosystem threats. Analyses of measured terrestrial river fluxes are key for identifying the drivers and quantifying the magnitudes of such riverine changes. In this paper, we develop and apply a data-driven regionalization approach using the dense network of discharge measurements in Sweden. The developed regionalization approach facilitates detailed mapping of discharges (Q) and change trends in Q across Sweden. Combining these with estimates of precipitation (P) and change trends in P, we estimated actual evapotranspiration (AET) and change trends in AET via catchment-scale water balance constraints. We identified characteristic land cover-evapotranspiration relationships by plotting water use efficiency (AET/P) against energy use efficiency (AET/potential ET) for areas with unique land cover across Sweden. Our results show that wetlands have clearly lower water and energy use efficiencies compared to open waters, forests, and agriculture, and that agriculture has water and energy use efficiencies closest to those of open waters. We further compared the data-driven regionalization estimates of different water balance components with estimates of regional climate models (RCMs). The RCMs do not describe well the observed change trends in Sweden. In particular, for evapotranspiration, the observed change trends are not reproduced by any of the investigated 24 RCMs. © 2013. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63849
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Environmental Sciences, Copernicus Institute for Sustainable Development, Utrecht University, Utrecht, Netherlands; Physical Geography and Quaternary Geology, Stockholm University, Stockholm, Sweden; Bert Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden

Recommended Citation:
Van Der Velde Y.,Lyon S.W.,Destouni G.. Data-driven regionalization of river discharges and emergent land cover-evapotranspiration relationships across Sweden[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(6)
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