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DOI	10.5194/hess-22-2881-2018
	Effects of climatic seasonality on the isotopic composition of evaporating soil waters
	Benettin P.; Volkmann T.H.M.; Von Freyberg J.; Frentress J.; Penna D.; Dawson T.E.; Kirchner J.W.
发表日期	2018
ISSN	1027-5606
起始页码	2881
结束页码	2890
卷号	22 期号:5
英文摘要	Stable water isotopes are widely used in ecohydrology to trace the transport, storage, and mixing of water on its journey through landscapes and ecosystems. Evaporation leaves a characteristic signature on the isotopic composition of the water that is left behind, such that in dual-isotope space, evaporated waters plot below the local meteoric water line (LMWL) that characterizes precipitation. Soil and xylem water samples can often plot below the LMWL as well, suggesting that they have also been influenced by evaporation. These soil and xylem water samples frequently plot along linear trends in dual-isotope space. These trend lines are often termed "evaporation lines" and their intersection with the LMWL is often interpreted as the isotopic composition of the precipitation source water. Here we use numerical experiments based on established isotope fractionation theory to show that these trend lines are often by-products of the seasonality in evaporative fractionation and in the isotopic composition of precipitation. Thus, they are often not true evaporation lines, and, if interpreted as such, can yield highly biased estimates of the isotopic composition of the source water. © 2016 Universidade Nova de Lisboa. All rights reserved.
语种	英语
scopus关键词	Evaporation; Soil moisture; Biased estimates; Characteristic signature; Evaporation lines; Isotope fractionation; Isotopic composition; Meteoric water lines; Numerical experiments; Stable water isotopes; Isotopes; climate change; ecohydrology; evaporation; experimental study; isotopic composition; isotopic fractionation; meteoric water; precipitation (climatology); seasonality; soil water; stable isotope
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160025
作者单位	Benettin, P., Laboratory of Ecohydrology ENAC/IIE/ECHO, École Polytechinque Fédérale de Lausanne (EPFL), Lausanne, Switzerland; Volkmann, T.H.M., Biosphere 2, University of Arizona, Tucson, AZ, United States; Von Freyberg, J., Department of Environmental Systems Science, ETH Zurich, Zurich, Switzerland, Research Unit Mountain Hydrology and Mass Movements, Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland; Frentress, J., Faculty of Science and Technology, Free University of Bolzano, Bolzano, Italy; Penna, D., Department of Agricultural, Food and Forestry Systems, University of Florence, Florence, Italy; Dawson, T.E., Department of Integrative Biology, University of California, Berkeley, CA, United States; Kirchner, J.W., Department of Environmental Systems Science, ETH Zurich, Zurich, Switzerland, Research Unit Mountain Hydrology and Mass Movements, Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland, Department of Ea...
推荐引用方式 GB/T 7714	Benettin P.,Volkmann T.H.M.,Von Freyberg J.,et al. Effects of climatic seasonality on the isotopic composition of evaporating soil waters[J],2018,22(5).
APA	Benettin P..,Volkmann T.H.M..,Von Freyberg J..,Frentress J..,Penna D..,...&Kirchner J.W..(2018).Effects of climatic seasonality on the isotopic composition of evaporating soil waters.Hydrology and Earth System Sciences,22(5).
MLA	Benettin P.,et al."Effects of climatic seasonality on the isotopic composition of evaporating soil waters".Hydrology and Earth System Sciences 22.5(2018).