globalchange  > 气候变化事实与影响
DOI: 10.5194/hess-18-2815-2014
Scopus记录号: 2-s2.0-84905455065
论文题名:
HESS Opinions "a perspective on isotope versus non-isotope approaches to determine the contribution of transpiration to total evaporation"
作者: Sutanto S; J; , Van Den Hurk B; , Dirmeyer P; A; , Seneviratne S; I; , Röckmann T; , Trenberth K; E; , Blyth E; M; , Wenninger J; , Hoffmann G
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期:8
起始页码: 2815
结束页码: 2827
语种: 英语
Scopus关键词: Calibration ; Evaporation ; Isotopes ; Parameterization ; Calibration and validations ; Calibration parameters ; Climatic conditions ; Global climate model ; Hydrological cycles ; Hydrometric measurements ; Land surface models ; Methodological aspects ; Transpiration
英文摘要: Current techniques to disentangle the evaporative fluxes from the continental surface into a contribution evaporated from soils and canopy, or transpired by plants, are under debate. Many isotope-based studies show that transpiration contributes generally more than 70% to the total evaporation, while other isotope-independent techniques lead to considerably smaller transpiration fractions. This paper provides a perspective on isotope-based versus non-isotope-based partitioning studies. Some partitioning results from isotope-based methods, hydrometric measurements, and modeling are presented for comparison. Moreover, the methodological aspects of the partitioning analysis are considered, including their limitations, and explanations of possible discrepancies between the methods are discussed. We suggest sources of systematic error that may lead to biases in the results, e.g., instruments inaccuracy, assumptions used in analyses, and calibration parameters. A number of comparison studies using isotope-based methods and hydrometric measurements in the same plants and climatic conditions are consistent within the errors; however, models tend to produce lower transpiration fractions. The relatively low transpiration fraction in current state-of-the-art land-surface models calls for a reassessment of the skill of the underlying model parameterizations. The scarcity of global evaporation data makes calibration and validation of global isotope-independent and isotope-based results difficult. However, isotope-enabled land-surface and global climate modeling studies allow for the evaluation of the parameterization of land-surface models by comparing the computed water isotopologue signals in the atmosphere with the available remote sensing and flux-based data sets. Future studies that allow for this evaluation could provide a better understanding of the hydrological cycle in vegetated regions. © Author(s) 2014. CC Attribution 3.0 License.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78180
Appears in Collections:气候变化事实与影响

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作者单位: Institute for Marine and Atmospheric Research Utrecht (IMAU), University of Utrecht, Princetonplein 5, 3584 CC Utrecht, Netherlands; Research Center for Water Resources, Ministry of Public Works, Jl. Ir. H. Djuanda 193, 40135 Bandung, Indonesia; KNMI, P.O. Box 201, 3730AE De Bilt, Netherlands; George Mason University, Mail Stop: 2B3, 4400 University Drive, Fairfax, VA 22030, United States; Institute for Atmospheric and Climate Science, ETH Zurich, CHN N11, Universitätstrasse 16, 8092 Zurich, Switzerland; National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307, United States; Centre for Ecology and Hydrology, Wallingford, Oxfordshire, OX10 8BB, United Kingdom; UNESCO-IHE, Department of Water Engineering, P.O. Box 3015, 2601 DA Delft, Netherlands; Delft University of Technology, Water Resources Section, P.O. Box 5048, 2600 GA Delft, Netherlands; LSCE-Orme, CEA-Orme des Merisiers, point courier 129, 91 Gif-Sur-Yvette cedex, France

Recommended Citation:
Sutanto S,J,, Van Den Hurk B,et al. HESS Opinions "a perspective on isotope versus non-isotope approaches to determine the contribution of transpiration to total evaporation"[J]. Hydrology and Earth System Sciences,2014-01-01,18(8)
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