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Long-Term Ecosystem Research in Europe


Organising Carbon and Hydrology In Dynamic Ecosystems

ORCHIDEE, the land surface component of the IPSL-CM5 Earth System Model, is a global process-oriented Terrestrial Biosphere Model. It calculates carbon, water and energy fluxes between land surfaces and the atmosphere. In the hydrological module, energy and hydrological balances are solved in half-hourly time steps. The carbon module describes photosynthesis and respiration at the same temporal resolution; the slow components of the terrestrial carbon cycle are calculated on a daily basis. Photosynthesis provides the link between the hydrologic module and the carbon module: The carbon module first calculates LAI and the hydrologic module then calculates gross primary production and stomatal conductance. The carbon module calculates growth and maintenance respirations, net primary production, heterotrophic respiration and net ecosystem exchange. To describe vegetation distributions, the model uses the concept of plant functional types.


Open source, available upon contact

Modelled processes...

Operating system(s): Linux


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