Howto: Run with the ORCHIDEE continental surface model

The ORCHIDEE continental surface model

This model is separate from LMDZ in the sense that it can be run on its own and that its source code is not included in the LMDZ repository.

You can check out the official ORCHIDEE website here : https://orchidee.ipsl.fr/

Coupling with LMDZ

Coupling between LMDZ and ORCHIDEE is however implemented and merely requires that:

1. The ORCHIDEE source code is available alongside the LMDZ directory (not mandatory but must match what is given in the arch.path file, see WhatIs: The target architecture ("arch") files)
2. The GCM must be compiled with the adequate "-v" option (see WhatIs: The makelmdz fcm script), i.e. "-v orchideetrunk" or "-v orchidee2.1" or "-v orchidee2.0" or "-v orchidee1.9"; use "makelmdz_fcm -h" to learn more about these)
3. the "VEGET" parameter in config.def should be set to "y":

VEGET=y

Note that if "VEGET" is set to "n" then a simple bucket scheme will be used.

ORCHIDEE parameters

There are many! All usually grouped in a "orchidee.def" file

ORCHIDEE input and output files

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03/01/2024