Changes between Version 44 and Version 45 of Documentation/TrunkFunctionality4

Timestamp:

2020-05-04T16:04:58+02:00 (4 years ago)

Author:

luyssaert

Comment:

--

Documentation/TrunkFunctionality4

@@ -418 +418 @@
 
 === Tree ring width (r6721) ===
-Tree ring width is always calculated. The output variable CCTRW represents the radial increase of individual trees for each circumference class. It is calculated daily in the module stomate_growth_fun_all, from basal area increment assuming that the tree trunk is circular. The basal area increment is saved to the output variable CCDELTABA. Both outputs are written to stomate_4dim.nc.   
+Tree ring width is always calculated and is not controlled by any flags or additional parameters. The basal area increment is central in the allocation scheme when making use of the Deleuze and Dhote rule to account for within stand competition between trees with different dimensions. It is saved to the output variable CCDELTABA (mm2 day-1). Basal area increment can be used to calculate the tree ring width when assuming that the cross-section of a tree trunk is circular. The output variable CCTRW represents the radial increase of individual trees for each circumference class (mm day-1). Since CCTRW is simply sqrt(ba_later/pi) - sqrt(ba_beginning/pi), it reconstructs trees from zero at year 1 removing the effect of BA_init. An implication of this approach is that the value at the first time step does not only include the growth calculated in stomate_growth_fun_all but also the basal area that was prescribed in stomate_prescribe.f90. The contribution of the initial tree dimensions prescribed in stomate_prescribe becomes more important if bigger trees are prescribed. Both CCDELTABA and CCTRW are written to stomate_4dim.nc.  
 
 === Vertical discretization soil carbon (r6721) ===