FCO2 fire fix

[rosiealice]

Description of changes

This removes the zeroing of the fire and grazing fluxes in the clmfate interface, replacing them with zeroing in the FATES patch routines in NorESMhub/fates#32 , and thus fixes the bias in the fire output fluxes.

Specific notes

Contributors other than yourself, if any:
@kjetilaas @maritsandstad

CTSM Issues Fixed (include github issue #):

Are answers expected to change (and if so in what way)?
Yes, to FCO2. Which will have larger fluxes replating to fire.

Any User Interface Changes (namelist or namelist defaults changes)?
No

Does this create a need to change or add documentation? Did you do so?
No

Testing performed, if any:
Here are the comparisons for (second and third rows) the default FCO2 when ONLY FIRE is used to generate it, vs the reported history fire flux, and the error between those two. The default has large (~10^-7) errors compared to the fixed version (~10^-10). The top row here is the same comparison when only the CLM HR is used to define FCO2, showing that there is some residual error. The remaining error is currently unxplained...

NOTE: Be sure to check your coding style against the standard
(https://github.com/ESCOMP/ctsm/wiki/CTSM-coding-guidelines) and review
the list of common problems to watch out for
(https://github.com/ESCOMP/CTSM/wiki/List-of-common-problems).

[maritsandstad]

Why is this one 26j and the other 26i?

[rosiealice]

The changes to the CTSM parameter file needed for this are:

< d_max = 10 ;

d_max = 15 ;
2560c2560
< frac_sat_soil_dsl_init = 0.6 ;

---

frac_sat_soil_dsl_init = 0.8 ;

and the path to the parameter file I am using is:

/cluster/work/users/rosief/NorESM_3_0_beta01_ctsm_v9/cime/scripts/ctsm60_params.v28m.nc
and/or
/cluster/work/users/rosief/NorESM_3_0_beta01_ctsm_v9/cime/scripts/ctsm60_params.v28m.cdl