Summary of the article:

Growth Respiration
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- Growth respiration is calculated as 0.11 times the total carbon allocation to new growth, based on construction costs for various tissues.
- The growth respiration associated with transferring allocated carbon and nitrogen from storage into displayed tissue is assumed to be negligible in CLM. 
- All growth respiration costs are incurred at the time of initial allocation, regardless of when the new growth is displayed.
- This behavior is parameterized such that a simple parameter modification could transfer a portion of the growth respiration to the time of growth display from storage.

Parameter Modification
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- The parameter `grpnow` in the CNGResp and CNAllocation routines, currently set to 1.0, could be changed to a smaller value.
- This would transfer a portion (1 - `grpnow`) of the growth respiration to occur at the time of growth display from storage, rather than at initial allocation.