A regional perspective on trends in continental evaporation

被引：255

作者：

Teuling, A. J. ^{[1
]}

Hirschi, M. ^{[1
]}

Ohmura, A. ^{[1
]}

Wild, M. ^{[1
]}

Reichstein, M. ^{[2
]}

Ciais, P. ^{[3
]}

Buchmann, N. ^{[4
]}

Ammann, C. ^{[5
]}

Montagnani, L. ^{[6
,7
]}

Richardson, A. D. ^{[8
]}

Wohlfahrt, G. ^{[9
]}

Seneviratne, S. I. ^{[1
]}

机构：

[1] ETH, Inst Atmospher & Climate Sci, CH-8092 Zurich, Switzerland

[2] Max Planck Inst Biogeochem, Biogeochem Model Data Integrat Grp, D-07745 Jena, Germany

[3] CEA CNRS UVSQ, LSCE, F-91191 Gif Sur Yvette, France

[4] ETH, Inst Plant Sci, CH-8092 Zurich, Switzerland

[5] Agroscope ART, CH-8046 Zurich, Switzerland

[6] Forest Serv, I-39100 Bolzano, Italy

[7] Agcy Environm, I-39100 Bolzano, Italy

[8] Univ New Hampshire, Complex Syst Res Ctr, Durham, NH 03824 USA

[9] Univ Innsbruck, Inst Ecol, A-6020 Innsbruck, Austria

来源：

GEOPHYSICAL RESEARCH LETTERS | 2009年 / 36卷

基金：

美国国家科学基金会;

关键词：

PAN EVAPORATION; CARBON-DIOXIDE; RUNOFF; CLIMATE;

D O I：

10.1029/2008GL036584

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Climate models suggest that enhanced greenhouse gas concentrations and aerosols have major impacts on the land energy and water cycles, and in particular on evapotranspiration (ET). Here we analyze how the main external drivers of ET (incident solar radiation and precipitation) vary regionally, using recent data from a eddy-covariance flux tower network (FLUXNET) and a multi-model re-analysis (GSWP-2). Trends in radiation (global "dimming'' and "brightening'') are expected to impact ET only in regions where ET correlates with radiation. In central Europe this correlation is particularly strong, and trends derived from weighing lysimeters and river-basin water budgets follow trends in radiation. In central North America the correlation is weak, and trends in precipitation rather than radiation explain trends in ET. Our results reconcile previous hypotheses by demonstrating the strongly regional and temporal differentiation of trends in evaporation. Citation: Teuling, A. J., et al. (2009), A regional perspective on trends in continental evaporation, Geophys. Res. Lett., 36, L02404, doi: 10.1029/2008GL036584.

引用

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