Articles | Volume 12, issue 11
Geosci. Model Dev., 12, 4751–4779, 2019
https://doi.org/10.5194/gmd-12-4751-2019
Geosci. Model Dev., 12, 4751–4779, 2019
https://doi.org/10.5194/gmd-12-4751-2019

Model evaluation paper 20 Nov 2019

Model evaluation paper | 20 Nov 2019

Accounting for carbon and nitrogen interactions in the global terrestrial ecosystem model ORCHIDEE (trunk version, rev 4999): multi-scale evaluation of gross primary production

Nicolas Vuichard et al.

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Short summary
In this research, we present a new version of the global terrestrial ecosystem model ORCHIDEE in which carbon and nitrogen cycles are coupled. We evaluate its skills at simulating primary production at 78 sites and at a global scale. Based on a set of additional simulations in which carbon and nitrogen cycles are coupled and uncoupled, we show that the functional responses of the model with carbon–nitrogen interactions better agree with our current understanding of photosynthesis.