Changes between Version 69 and Version 70 of DevelopmentActivities/MergeOCN/Vuichard

Timestamp:

2014-03-14T16:45:15+01:00 (10 years ago)

Author:

nvuilsce

Comment:

--

DevelopmentActivities/MergeOCN/Vuichard

@@ -236 +236 @@
   2/ The solution that is proposed by Kull and Kruijt (1998) and this is implemented in OCN (cexchange) assumes that Ci (the intercellular CO2 concentration is known). So there is no attempt to solve jointly A (the assimilation), Ci and gs (the stomatal conductance). I don't know we could keep the analytical solution of Yin et al. (2009) with the formulation proposed by Kull and Kruijt.
 
-* In diffuco_trans_co2, the leaf N is impacting Vcmax and Jmax based on the work of Friend et al. (1997, eq. 46 and 47, [https://cloud.lsce.ipsl.fr/index.php/apps/files/download/Shared/ORCHIDEE/REFERENCES/ORCHIDEE-N/friend_1997.pdf here]).[[BR]] 
+* In diffuco_trans_co2, the leaf N is impacting Vcmax and Jmax based on the work of Friend et al. (1997, eq. 46 and 47, [https://cloud.lsce.ipsl.fr/index.php/apps/files/download/Shared/ORCHIDEE/REFERENCES/ORCHIDEE-N/friend_1997.pdf here]). See [source:branches/orchidee-N/ORCHIDEE/src_stomate/stomate_vmax.f90@19#L273 here] [[BR]] 
  The factor impacting Vcmax and Jmax corresponds the fraction of leaf N present in RubB relatively to the reference fraction. It is a linear function of leaf N content with the following two equations:[[BR]]
  f_Rub + 12.5 f_Chl + f_other = 1  (eq. 46)[[BR]]
@@ -242 +242 @@
  where f_Rub, f_chl and f_other are the fraction of leaf N, in RubP, Chlorophyl and other pools respectively and N the leaf N content (gN m-2 ? kgN m-2 ? )
 
- Here is a comment of Sönke about the way he accounts for N limitation on photosynthesis: ''N effect is fraction in Rubisco (relative to normal) times leaf N relative to normal. It should be based on true calculus, but results with BIOME-BGC/Hybrid formulation are not realistic - don't yet understand the cause of the error''.
+ Some comments on the way the N limitation is accounted for : 
+  1/ a comment of Sönke: ''N effect is fraction in Rubisco (relative to normal) times leaf N relative to normal. It should be based on true calculus, but results with BIOME-BGC/Hybrid formulation are not realistic - don't yet understand the cause of the error''.
+
+  2/