ISBA

Description

ISBA (Soil-Biosphere-Atmosphere Interaction) is a land surface scheme developped in CNRM by the team working on meso-scale modelling (GMME). There is now a CO2-responsive version, called ISBA-Ags, and an externalized version (SURFEX) is currently being developped. At present, the ISBA version that is implemented in the ARPEGE-Climat model is relatively simple with only 2 hydrological soil layers. The GMGEC group also contributes to the ISBA developpement by :

¤ introducing a simple parameterisation of the snow cover (Douville et al., 1995).

¤ developping sub-grid effects on hydrological processes (Decharme and Douville, 2006).

¤ implementing the ISBA-Ags version and a complete carbone cycle (Gibelin et al., 2006)

¤ validating ISBA at the global scale, with a particular emphasis in comparing runoff over large basins with river runoff measurements (use of the TRIP river routing model), in the context of GSWP-2.

Related publications

Decharme B., Douville H., 2006: Introduction of a sub-grid hydrology in the ISBA land surface model. Climate Dynamics 26(1), 65 - 78, doi: 10.1007/s00382-005-0059-7 .

Decharme B. and Douville H., 2006: Uncertainties in the GSWP-2 precipitation forcing and their impacts on regional and global hydrological simulations. Climate Dynamics, 27(7-8), 695-713, doi: 10.1007/s00382-006-0160-6.

Decharme B., Douville H., Boone A., Habets F., Noilhan J., 2006: Impact of an exponential profile of saturated hydraulic conductivity within the ISBA LSM : simulations over the Rhône basin. J. Hydrometeorology , 7, 61-80.

Douville, H., Royer, J.-F. and Mahfouf, J.-F. (1995a): A new snow parametrization for the Météo-France climate model. Part I: Validation in stand-alone experiments, Clim. Dyn. 12, 21-35

Douville, H., Royer, J.-F. and Mahfouf, J.-F. (1995b): A new snow parametrization for the Météo-France climate model. Part II: Validation in a 3-D GCM experiments, Clim. Dyn. 12, 37-52

Gibelin A.L., Calvet J.C., Roujean J.L. Jarlan L. and S. Los, 2006 : Ability of the land surface model ISBA-A-gs to simulate leaf area index at the global scale: Comparison with satellites products. J. Geophys. Res., 111, D18102.

Mahfouf, J.-F., Manzi, O., Noilhan, J., Giordani, H., Déqué, M. (1995): The land surface scheme ISBA within the Météo-France climate model ARPEGE. Part I: Implementation and preliminary results. J. Climate, 8, 2039-2057.

Mahfouf, J.-F. and Noilhan, J. (1996): Inclusion of gravitationnal drainage in a land surface scheme based on the force-restore method. J. Appl. Meteor. 35, 987-992.

Noilhan, J. and Planton, S. (1989): A simple parameterization of land surface processes for meteorological models. Mon. Wea. Rev. 117, 536-549