000022331 001__ 22331 000022331 005__ 20200702121622.0 000022331 0247_ $$2DOI$$a10.1016/j.jhydrol.2012.03.041 000022331 0247_ $$2WOS$$aWOS:000305200700008 000022331 037__ $$aPreJuSER-22331 000022331 041__ $$aeng 000022331 082__ $$a690 000022331 084__ $$2WoS$$aEngineering, Civil 000022331 084__ $$2WoS$$aGeosciences, Multidisciplinary 000022331 084__ $$2WoS$$aWater Resources 000022331 1001_ $$0P:(DE-Juel1)VDB108058$$aRothfuss, Y.$$b0$$uFZJ 000022331 245__ $$aFactors controlling the isotopic partitioning between soil evaporation and plant transpiration: Assessment using a multi-objective calibration of SiSPAT-Isotope under controlled conditions 000022331 260__ $$aAmsterdam [u.a.]$$bElsevier$$c2012 000022331 300__ $$a75 - 88 000022331 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article 000022331 3367_ $$2DataCite$$aOutput Types/Journal article 000022331 3367_ $$00$$2EndNote$$aJournal Article 000022331 3367_ $$2BibTeX$$aARTICLE 000022331 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000022331 3367_ $$2DRIVER$$aarticle 000022331 440_0 $$03413$$aJournal of Hydrology$$v442-443$$x0022-1694$$y6 000022331 500__ $$3POF3_Assignment on 2016-02-29 000022331 500__ $$aWe thank the PNRH Thematic Action of the French ECCO (ECosphere COntinentale) program for providing part of the financial support of the study. We thank Ludovic Oudin (UMR Sisyphe) for his helpful commentaries all along the writing of the manuscript. 000022331 520__ $$aStable isotopes of water (O-18 and H-2) are tracers of ecosystem processes and in particular of water vapour sources. They have been substantially used for evapotranspiration (ET) studies. Data gathered during a series of soil monoliths experiments under fully controlled conditions allowed the partitioning of ET fluxes into soil evaporation (Ev) and plant transpiration (Tr) from isotopic measurements along growth of a tall fescue cover. These data were used to calibrate SiSPAT-Isotope, a 1D Soil-Vegetation-Atmosphere Transfer (SVAT) model coupled with a module for isotopic transport in the soil and the atmosphere. For this, the soil isotopic module was extended to take into account plant water uptake by roots and the model was modified so that it could be constrained with collected input data (e.g. ET flux). The multi-objective calibration method allowed determining narrowed probability distributions for soil, plant and isotopic parameters of which some are currently debated and/or typically not measured in the field (e.g. kinetic fractionation factor during soil evaporation). Comparisons between simulation results corresponding to the "best compromise" parameter set with data (i.e. soil water pressure and contents, soil temperatures and heat fluxes, soil isotopic compositions, and root extraction depths) were provided to show the consistency of the calibration method. Guidelines were provided for the determination of the isotopic composition of evaporation in the field: we could emphasize the importance of values used for the kinetic fractionation factor and the impact of the heights at which atmospheric variables (air relative humidity and temperature, isotopic composition of atmospheric water vapour) are measured in the field. (C) 2012 Elsevier B.V. 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