Vuichard's page on MergeOCN

This page describes the work of inclusion of the N cycle in the trunk of ORCHIDEE based on the work of S. Zaehle. It is based on two versions of OCN. The "original" one as given by S. Zaehle in 2009 (rev 19, source:branches/orchidee-N@19) and the one modified by B. Guenet, N. Viovy which corresponds to the head of the same branch (source:branches/orchidee-N@19).

We first aim to implement the N-cycle in a version closed to the trunk version of ORCHIDEE but that accounts for the re-formulation of the aloccation (making use of labile C pool of reserve) as done by S. Luyssaert in the DOFOCO branch. To do so, we started from a "hybrid" version where the sechiba component is from the trunk version of ORCHIDEE and the stomate component is from the DOFOCO branch. The work of integration of the N specifities has started from this version that is stored here : source:branches/orchidee-N@1648

Here below,

SOM decomposition issue - 27/11/2013

OCN contains the version of Century published in 1993 while the ORCHIDEE is more based on the publication of 1987. Questions:

• Fraction towards the passive pool of the carbon flow that goes out of the slow pool is set to 0.03 in Parton 1987, insead of 0.003-0.009*clay_fraction in Parton, 1993. Soenke kept the parametrization of 1987. Why ?