review ForC variable set/mapping to IPCC C pools

[teixeirak]

I've just created the figure below mapping ForC variables to the C pools defined by IPCC. We'll use this as a guide for mapping ForC data to EFDB/ the IPCC system (already done for stocks) and have it as a figure in @mawilliams99's paper.

@bpbond , @hmullerlandau, @cpiponiot, I'd appreciate your critical feedback on two aspects of this: (1) make sure you don't see any errors/inconsistencies (2) Are there any cases where no variable has been defined in ForC, but you think it's worth naming/defining one? Some would be nearly impossible to measure (e.g., change from litter to soil pool), whereas others could in theory be estimated fairly easily (e.g., stock and influx of dead coarse roots, movement of standing dead wood to fallen dead wood). I don't know that there are enough records out there to make it worth it, but if we want to recommend that people start estimating these, we could define the variables. There's no real cost to doing so. I just added a bunch of increment ("delta.[stock]") variables (#6).

For reference, the definitions of those fields are here:

[teixeirak]

Here's a slightly updated version (change is to litter variable):

[teixeirak]

• [ ] Note to self: consider including ANPP_branch.fall

[teixeirak]

Note to self: sent 9/08 for Valentyna to review; awaiting response.