Version 4 (modified by luyssaert, 10 months ago) (diff)


The French configurations

To do: *GM: Ask Nicolas Viovy whether his files are for his driver or standard driver. *PP: Prepare SAFRAN for 2.1new driver (Philippe will ask Vlad for scripts/insights). Make sure it is compatible with the current and new driver. *GM: Ask Miriam (ADEME) or Infosoil INRAE (Orleans) about the French soil map they want us to use. How to get the map? Texture map? Carbon content? Soil water holding capacity? *AD: High resolution basin information needs to be prepared (this is already on Agnes’s to do list). Conversion from lambert-projection to lat/lon. *PP: CITEPA ask for their land cover map.


The files which make up the basic configuration will be prepared for the trunk (ORCHIDEE 4.x), ORCHIDEE 3.x and Tags 2.x

Vegetation discretization

A single land cover map with the current 15 default PFTs will be prepared for a recent year. The forest, grassland and cropland MTCs can be refined in species-specific PFTs if required by the application.

Parameter files

The parameter files will depend on the number of PFTs that was used to discretize the vegetation. For ORCHIDEE 4.x parameter files can be managed through the scripts and database stored in config/ORCHIDEE_OL/MAKE_RUN_DEFS.

Land cover change map

Climate forcing

Soil map


River basins

Not working yet at this resolution. For the time being we could store high resolution run-off information through the history files. Run-off could be calculated in post-processing.


CMIP6+census C3 & C4 crops or more details?

Land cover change map Past only - Future only

Restart - Own spinup Own spinup

Intended uses

  1. Projects: ADEME and Marie Curie of Guillaume Marie

Nicolas Vuichard, Jina Jeong, Guillaume Marie and Sebastiaan Luyssaert

The ADEME project has a focus on France and the MSC a focus on Europe. The projects study the impact of natural disturbances and forest management on the future forest health.

Configuration spinup ORCHIDEE 4.x: sechiba, stomate and sapiens Vegetation discretization: tree species level, three diameter classes and three or four age classes Restart: none Land cover change map: to be created based on the NFI age distribution map, NFI species distribution map, and the LUHv2 or another LCC product. Climate forcing: medium resolution (~ 8x8 km) no other specific requirements. Currently looking into SAFRAN data 1986 to 2018. Soil map: if available the soil map from a previous ADEME project. If not any soil map could do. Forest management map: for the year 2010 (default or based on NFI)

Configuration transient Included in the spinup thanks to a dedicated land cover change map

Configuration simulation experiments ORCHIDEE 4.x: sechiba, stomate and sapiens Restart: from spinup Land cover change map: none PFT map: based in NFI data (last map of the Land cover change maps that need to be prepared for the spinup) Climate forcing: downscaled AR5. medium resolution (~ 8x8 km). We will have an inconsistency between the spinup and the future simulations no matter which forcing we use. Soil map: if available the soil map from a previous ADEME project. If not any soil map could do. Species change maps: based on the scenarios France (this is part of the simulation experiment) Management change maps: based on the scenarios France (this is part of the simulation experiment)

Tree-ring simulations for Fontainebleau and Paris (Jonathan, Jina, Sebastiaan, Philippe, Valerie) Site-level simulations for PFT4 and PFT6 (PFT refination for oak possibly) ORCHIDEE 4.x: sechiba, stomate

  1. Projects: Services climatiques IPSL, Explore2 (MTES), BLUEGEM if funded by Belmont Forum

Agnès Ducharne, Jan Polcher, Frédérique Chéruy, Philippe Peylin, Bertrand Guenet, Philippe Ciais

All three projects have a focus on water resources and their response to climate change and anthropogenic pressures, especially from the agricultural sector.

Configuration simulation experiments ORCHIDEE 2.x (3.x foreseen in a second step with Nicolas Vuichard): sechiba, stomate with HR routing, GWF, and irrigation Restart: from spinup PFT map: first step with CMIP6 maps, and attempts to use French agricultural census Land cover change: yes, using standard CMIP6 maps Climate forcing: SAFRAN (~ 8x8 km) + downscaled bias-corrected climate projections from other partners of the projects ; CORDEX output Soil map: first step with Reynolds, but tests with the INRA soil map Management change maps: for agriculture and irrigation, using standard CMIP6 maps (LUHv2), and tailored irrigation Model calibration : with ORCHIDAS over the historical period, to match hydrological observations

  1. Projects: Carbon flux simulation in the context of the VERIFY project and in collaboration with CITEPA

Matthew Mcgrath, Philippe Peylin, ….

We started a discussion with CITEPA which is an agency making the Greenhouse gaz budget for France for the UNFCCC. They are considering of “possibly” using the ORCHIDEE model as an additional source of information for their budget (the NBP of ORC)

We should probably phase these simulations with Project-1 of Guillaume Marie.

But CITEPA could contribute as they have “made” specific land cover maps for France (annual) based on different products (ESA-CCI, a map from CESBIO, Corinne LC, ..)

  1. Produce adequate forcing to run ORCHIDEE at km-scales

Jan Polcher, Nicolas Vuichard, Nathalie De Noblet, … To be able to use ORCHIDEE over France at an appropriate resolution we also need the adequate forcing. Not only in terms of spatial resolution but also on the quality of the diurnal cycle of rainfall. I.e. the intensity of rainfall needs to be correct so that all the issues with ORCHIDEE’s water cycle come to light and we can explore our ability to simulate extreme events.

Dear Sebastiann,

that is fine with me.

You have to know that there is a project which will be submitted next week to build a forcing for ORCHIDEE at 3km. This would mean running RegIPSL (WRF+ORCHIDEE) forced with ERA5. It would provide a dynamically downscaled version of the re-analysis which can serve for model development ... and in the end see how these improvements feedback o the atmosphere.

If Nicolas Vuichard attends the meeting he will be able to provide more details.

Best regards


Dear Sebastiaan,

I see this as progressive !

Yes, at high resolution some heterogeneities become more important.

The plan would to run RegIPSL with ORCHIDEE as it is over the 1979-2020 period ... perhaps with some fudge for the background albedo. This gives a forcing data set which is already better for ORCHIDEE as the lower boundary conditions do not reflect HTESSEL any more.

Using this high resolution forcing we can then work to refine ORCHIDEE, introduce new processes ... whatever is needed. When we feel confident that we have a model which is better suited to represent kilometric scale heterogeneities, then we can re-run RegIPSL. This achieved two goals : 1) how important are these improvements to ORCHIDEE to better represent near surface atmospheric processes and what do we gain in terms of PBL structure and so on. 2) we have a second version of forcings for ORCHIDEE off-line which can be the basis for further improvements.

I see this as a key evolution of ORCHIDEE to fulfil the requests we get for climate services.

I will ask Nicola if he is interested and has time for this meeting.

Best regards


Forgot to add that we have a prototype for this.

We have 10 years of ERA-I downscaled to 3km over the Iberian Peninsula. The domain goes up to Northern France but it is only usable south of the Loire. So that could easily be made available.

The diurnal cycle of rainfall is quite different and much more realistic than ERA-I (compare to MF radar based climatologies). So that affects directly the interception loss and soil infiltration. Nobody is looking how the vegetation state predicted by ORCHIDEE are changing at these resolution !

Best regards


Discussion concerning the French configuration


Vegetation discretization

Parameter files

Land cover change map

Climate forcing

Soil map


River basins

Not working yet at this resolution. For the time being we could store high resolution run-off information through the history files. Run-off could be calculated in post-processing.


Bonjour a tous,

Suite à l'échange d'email avec l'ADEME, Manuel Martin de l'INRAE infosol d'Orléans propose d'utiliser la carte de sol RMQS-RU pour la texture des sol et la RU, voici les deux publications concernant ce projet.

Dobarco, M. R., Cousin, I., Le Bas, C., & Martin, M. P. (2019). Pedotransfer functions for predicting available water capacity in French soils, their applicability domain and associated uncertainty. Geoderma, 336, 81-95.

Dobarco, M. R., Bourennane, H., Arrouays, D., Saby, N. P., Cousin, I., & Martin, M. P. (2019). Uncertainty assessment of GlobalSoilMap? soil available water capacity products: A French case study. Geoderma, 344, 14-30.

Pensez-vous que cette carte pourrait intégrer les cartes de forçage des textures de sol pour ORCHIDEE ? Manuel Martin parle d'une licence a obtenir pour accédé à la carte. Doit-on en déduire qu'elle sera payante ?


Guillaume MARIE

Bonjour Guillaume,

j’avoue que je suis un peu perdue, et pour en rajouter une couche voici un autre papier, lié au 2ème ci-dessous: GlobalSoilMap? France: High-resolution spatial modelling the soils of France up to two meter depth D'ailleurs, si qq1 a les pdfs, je suis preneuse car je n'ai pas les droits pour les télécharger.

Mais pour être un peu plus constructive, voici ce que je peux dire :

Les paramètres hydriques sont actuellement au nb de 7 : ks (conductivité hydraulique), alpha et n (paramètres de van Genuchten), mcs (saturation), mcr (residual), mcw (wilting point), mcf (field capacity), sachant que les deux derniers peuvent être calculés à partir des 5 autres, et que la RU est donnée par le produit de leur différence (mcf-mcw) avec mcs et al profondeur du sol.

Deux façons sont actuellement disponibles pour définir ces paramètres (dans la branche 2_2) : (a) lire une carte de classes de textures USDA (12 classes, qui peuvent être déduites des fractions de sand/clay) et utiliser les PTF discrètes (Carsel et Parrish 1988) codées dans constantes_soil_var.f90 (b) lire une carte pour chacun des paramètres, ce qui permet d’être très flexible (c'est al nouveauté dans 2_2 et ça peut facilement intégré dans le trunk)

Ensuite, il y a d'autres paramètres du sol dans ORCHIDEE:

  • la fraction d’argile qui sert dans stomate
  • les paramètres thermiques sont actuellement déduits de la texture, à partir d'une carte de classes de textures USDA

Conclusion : même si on veut utiliser des cartes de paramètres hydriques, il faut actuellement rentrer une carte de classe de texture.

Enfin, quand je regarde la carte de texture de surface en Figure 8 du papier ci-dessous, ça me semble une très bonne base. Par contre, on peut se demander s'il faut prendre la texture en surface ou à 30 cm.

Suggestion: cartographier la classe texturale dominante à partir de cette carte (ou celle que vous aurez choisie in fine) à la résolution SAFRAN ; cartographier aussi les paramètres déduits avec nos PTFs et les comparer avec les cartes de paramètres recommandées par l'ADEME si c'est le cas.

Amicalement, Agnès