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ISSN: 2157-7587

Hydrology: Current Research
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  • Research Article   
  • Hydrol Current Res 2016, Vol 7(4): 258
  • DOI: 10.4172/2157-7587.1000258

The Water Isotopic Version of the Land-Surface Model ORCHIDEE: Implementation, Evaluation, Sensitivity to Hydrological Parameters

Camille Risi1*, Jerome Ogée2, Sandrine Bony1, Thierry Bariac3, Naama Raz-Yaseef4,5, Lisa Wingate2, Jeffrey Welker6, Alexander Knohl7, Cathy Kurz-Besson8, Monique Leclerc9, Gengsheng Zhang9, Nina Buchmann10, Jiri Santrucek11,12, Marie Hronkova11,12, Teresa David13, Philippe Peylin14 and Francesca Guglielmo14
1LMD/IPSL, CNRS, UPMC, , Paris, France
2INRA Ephyse, , Villenave d’Ornon, France
3UMR 7618 Bioemco, CNRS-UPMC-AgroParisTech-ENS Ulm-INRA-IRD-PXII Campus AgroParisTech, Bâtiment EGER, , Thiverval-Grignon, 78850, France
4Earth Sciences Division, Lawrence Berkeley National Laboratory, , Berkeley, USA
5Department of Environmental Sciences and Energy Research, Weizmann Institute of Science, , PO Box 26, Rehovot 76100, Israel
6Biology Department and Environment and Natural Resources Institute, University of Alaska, Anchorage, AK 99510, USA
7Bioclimatology, Faculty of Forest Sciences and Forest Ecology, Georg-August University of Göttingen, , 37077 Göttingen, Germany
8Instituto Dom Luiz, Centro de Geofísica IDL-FCUL, , Lisboa, Portugal
9University of Georgia, Griffin, GA 30223, USA
10Institute of Agricultural Sciences, , ETH Zurich, Zurich, Switzerland
11Biology Centre ASCR, , Branisovska 31, Ceske Budejovice, Czech Republic
12University of South Bohemia, Faculty of Science, Branisovska 31, Ceske Budejovice, Czech Republic
13Instituto Nacional de Investigação Agrária e Veterinária, , Quinta do Marquês, Portugal
14LSCE/IPSL, CNRS, UVSQ, Orme des Merisiers, , Gif-sur-Yvette, France
*Corresponding Author : Camille Risi, LMD/IPSL, CNRS, UPMC, Paris, France, Tel: +33144276272, Email: [email protected]

Received Date: Aug 30, 2016 / Accepted Date: Sep 24, 2016 / Published Date: Oct 01, 2016

Abstract

Land-Surface Models (LSMs) exhibit large spread and uncertainties in the way they partition precipitation into surface runoff, drainage, transpiration and bare soil evaporation. To explore to what extent water isotope measurements could help evaluate the simulation of the soil water budget in LSMs, water stable isotopes have been implemented in the ORCHIDEE (ORganizing Carbon and Hydrology In Dynamic EcosystEms: the land-surface model) LSM. This article presents this implementation and the evaluation of simulations both in a stand-alone mode and coupled with an atmospheric general circulation model. ORCHIDEE simulates reasonably well the isotopic composition of soil, stem and leaf water compared to local observations at ten measurement sites. When coupled to LMDZ (Laboratoire de Météorologie Dynamique-Zoom: the atmospheric model), it simulates well the isotopic composition of precipitation and river water compared to global observations. Sensitivity tests to LSM (Land-Surface Model) parameters are performed to identify processes whose representation by LSMs could be better evaluated using water isotopic measurements. We find that measured vertical variations in soil water isotopes could help evaluate the representation of infiltration pathways by multi-layer soil models. Measured water isotopes in rivers could help calibrate the partitioning of total runoff into surface runoff and drainage and the residence time scales in underground reservoirs. Finally, co-located isotope measurements in precipitation, vapor and soil water could help estimate the partitioning of infiltrating precipitation into bare soil evaporation.

Keywords: Water isotopes; Land-surface model; Global models; Soil water budget; Rain infiltration; Runoff; Evapo-transpiration partitioning

Citation: Risi C, Ogée J, Bony S, Bariac T, Raz-Yaseef N, et al. (2016) The Water Isotopic Version of the Land-Surface Model ORCHIDEE: Implementation, Evaluation, Sensitivity to Hydrological Parameters. Hydrol Current Res 7: 258. Doi: 10.4172/2157-7587.1000258

Copyright: © 2016 Risi C, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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