Fair Use Policy for ORCHIDEE

The fair use policy is designed to ensure that the individuals and teams that develop the ORCHIDEE model receive proper credit for their work. The policy applies to the use of the referenced version described below. This model version is freely available; it is furnished by the ORCHIDEE project group (see ) who encourage its use. Please kindly inform by email (orchidee-projet at how you will use the model and of any publication plans. If not yet published, please reference the source of the data or model output as a citation or in the acknowledgments. The scientists who provided the data or model output will tell you if they feel they should be acknowledged or offered participation as authors. We assume that an agreement on such matters will be reached before publishing and/or use of the data for publication. If your work directly competes with an ongoing investigation, the scientists who provided the data or model output may ask that they have the opportunity to submit a manuscript before you submit one that uses their data or model output. When publishing, please acknowledge the agency that supported the research. We kindly request that those publishing papers using AmeriFlux data, Fluxnet Canada data, or Regional MDC model output provide reprints to the appropriate scientist providing the data or model output, and to the data archive at the Carbon Dioxide Information Analysis Center (CDIAC).

Recognition of intellectual contributions to the ORCHIDEE environment will be ensured by:

  • Offering co-authorship on any publication that benefits of recent improvements in the ORCHIDEE environment. We deliberately refrain from specifying ‘recent’ as it should be function of the intellectual contribution and the exposure this contribution already received.
  • Discussing, early on, intended usage of recent improvements in the ORCHIDEE environment. This discussion should prevent uses and/or applications of the ORCHIDEE environment which are in conflict with the plans of the main contributor.
  • The main contributor to the ORCHIDEE environment lists his/her intended usage of his/her recent improvements in the ORCHIDEE environment (see Section “Intended studies”).

The fair use policy is designed as a win-win opportunity for both users and developers of the ORCHIDEE environment. It warrants the continuation of ambitious model developments and thus contributes to safeguarding our leadership in land surface modelling.


How to use ORCHIDEE

  1. Free use of a referenced version
    The version that was used for the CMIP5 exercice is freely available
    Access to the code:
  • downloding code: Please send an email to “orchidee-projet at” with your intended use of ORCHIDEE. You will receive the connection details to download the reference version (via svn)

Support: see the online documentation

  • Use of follow-up recent versionsORCHIDEE is a continuously evolving research tool. Despite the efforts of documenting and validating tags before their release, new users are likely to require help to correctly use the full functionality of ORCHIDEE and its run environment. For this purpose we organize regular training days detailing the scientific basis of the model as well as the technical aspects of its run environment.
    For new users, the first line of support is the ORCHIDEE wiki that becomes accessible following registration. The second line of support is the supervisor. For users who participated in the training days and have a formal working agreement with the ORCHIDEE project team a third line of support is the help mailing list

    Requests for support from unregistered users, non-academic users or users without a working agreement with someone from the “ORCHIDEE-Project team” will not be considered


We may need your expertise

The IPSL (Institut Pierre Simon Laplace) gathers 9 laboratories whose research topics focus on the global environment with a common strategy for the study of the Earth System as a whole A major research mission is to contribute to a better understanding of the interactions between human activities in the Earth System, environment and climate dynamics at different time scales. If you have a PhD in mathematics, physics, engineering, computer science, meteorology, or physiology, or you believe that your skills could contribute to the development of ORCHIDEE as the land surface component of the IPSL Earth System model, feel free to send us your CV, a customized letter of motivation and three names of people who are willing to act as references.