BIBLIOS

Document type
Journal articles

Document subtype
Full paper

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

Participants in the publication
Camille Risi (Author)
Jerome Ogee (Author)
Sandrine Bony (Author)
Thierry Bariac (Author)
Naama Raz Yaseef (Author)
Lisa Wingate (Author)
Jeffrey Welker (Author)
Alexander Knohl (Author)
Cathy Kurz Besson (Author)
INSTITUTO SUPERIOR DE AGRONOMIA
IDL
Monique Leclerc (Author)
Gengsheng Zhang (Author)
Nina Buchmann (Author)
Jiri Santrucek (Author)
Marie Hronkova (Author)
Teresa David (Author)
Philippe Peylin (Author)
Francesca Guglielmo (Author)

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


Where published
Hydrology: Current Research

Publication Identifiers
ISSN - 2157-7587

Publisher
OMICS Publishing Group


Document Identifiers
DOI - https://doi.org/10.4172/2157-7587.1000258
URL - http://dx.doi.org/10.4172/2157-7587.1000258

Rankings
CITESCORE Q2 (2018) - 2.02 - Earth-Surface Processes