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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
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| 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). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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