ORCHIDEE-MEB

ORCHIDEE-MEB has been implemented on the version 4369 of the trunk. It consists of doing multi energy, hydrology budgets. The implementation has been developed by Karine Petrus on the period 01/01/2017-31/08/2017. The scheme (i.e. loop over each subroutine and transfer of variable to mc variable) that James Ryder has implemented in the version ORCHIDEE-DOFOCCO-MULTICOLUMN was taken in the same way.

Implementation

General idea

It consists to create a supplementary dimension to each variable which correspond to one energy, hydrology budget. In order to do a multi budget over each variable, loop over each subroutine has been chosen. The scheme is implemented such as for each subroutine (i.e. enerbil, diffuco, slowproc etc .. ) in the sechiba file for the global variables.

DO i=1,ncol_enerbil
     pre_subroutine_mc(nmc)
     subroutine(..)
     post_subroutine_mc(nmc)
END DO

#These subroutines are meant to pass variables computed in the subroutine
#to the multi-column variables

pre_subroutine_mc(nmc)
variable=variable_mc

post_subroutine_mc(nmc)
variable_mc=variable

and in each module file (i.e.: enerbil.f90, diffuco.f90 ..etc) for the local variables.

Some tricky points

Some variables such as the wind velocity computed thanks to the roughness or the swnet (which were computed in the driver.f90) have been moved to the file sechiba.f90 in order to take into account the multi-column aspect. The albedo _out was created (the same way as for the z0m_out..(internal fields to outputs)) in order to be able to create an albedo_mc

Validation of the code

The validation has been done by running the model with 2,3,4 tiles with different PFT and compare each output (surface temperature, sensible flux ..) for each tile to the corresponding tile of the trunk.

Future of the version

Run of the version

Outputs of the version

This code gives as outputs all the multicolumns variables.