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The ORCHIDEE model includes 3 components: sechiba, stomate and LPJ (dynamic vegetation). Only the 2 components sechiba and stomate are activated by default. If you are using a coupled configuration with LMDZ, you will need the sechiba component to compute the water and energy balance. You will also need the stomate component to compute the carbon balance but this component can be deactivated. You will find additional information on how to use ORCHIDEE in libIGCM-supported configurations below.
2 compile methods are used in ORCHIDEE depending on the version. Read more about compiling on the ORCHIDEE wiki: https://forge.ipsl.jussieu.fr/orchidee/wiki/Documentation/UserGuide/CompileMethods
Compiling with makeorchidee_fcm
Obsolete : Standard makefiles created based on AA_make and AA_make.gdef
The vegetaion map (PFTmap.nc) can be constant or updated annually. Use the option VEGET_UPDATE=0Y for constant vegetaion map and VEGET_UPDATE=1Y to update annually the vegetation map. Note that in previous versions of ORCHIDEE up to revision 2718 on the trunk, including _v5 configurations, the vegetation map was updated in the end of the year with the map for the next coming year. In newer versions and all _v6 configurations, the vegetation map is updated on the first day of the year.
For constant vegetation map, set in orchidee.card (or sechiba.card) VEGET_UPDATE=0Y and set in [InitialStateFiles] the PFTmap.nc file you want to use for the simulation. Note that for constant vegetation map, the vegetation will be read from the restart file. Only if it is not found in the restart file, then the file PFTmap.nc will be read.
To update annually the vegetation map set in orchidee.card (or sechiba.card) VEGET_UPDATE=1Y and set :
[BoundaryFiles] List= (${R_BC}/SRF/${config_UserChoices_TagName}/PFTmap_1850to2005_AR5_LUHa.rc2/PFTmap_IPCC_${year}.nc, PFTmap.nc)
[SmoothFiles] List=(${R_BC}/SRF/${config_UserChoices_TagName}/PFTmap_1850to2005_AR5_LUHa.rc2/PFTmap_IPCC_${year_p1}.nc, PFTmap.nc, 12:12:)
[BoundaryFiles] List= (${R_BC}/SRF/${config_UserChoices_TagName}/PFTmap_1850to2005_AR5_LUHa.rc2/PFTmap_IPCC_${year_p1}.nc, PFTmap.nc)
The model output frequency is configured in the config.card file.
In orchidee.card you can specify variables inducing a change in the model input parameter files. The default parameter values are:
You can deactivate STOMATE component included by default in all experiments with ORCHIDEE. In this case, you only run the SECHIBA component. To do so:
ListNonDel= (${R_BC}/SRF/${config_UserChoices_TagName}/lai2D_03.nc, lai2D.nc)
# Read a LAI map (12 monthly values) LAI_MAP = y # default = n