35.2.4 Netcdf information for nonconstant diffusivities

The nonconstant diffusivity schemes provide an added amount of structure to the tracer diffusivities. This structre is of interest when studying the details of the schemes. For this purpose, a number of two dimensional fields are mapped to the netcdf file ncdiff.dta.nc whenever the diagnostic option ncdiff_netcdf is enabled. The interval of output is determined by the namelist parameter diffsnapint, which is set along with the other nonconstant diffusivity namelist parameters. The following fields are plotted: T^-2, $\beta_{eff}$, L_hl, $\kappa_{hl}$, L_vmhs, $\kappa_{vmhs}$, and A_gm. $A_{gm} = min(\kappa_{hl},\kappa_{vmhs})$ is the nonconstant GM diffusivity. Note that A_redi = A_gm if the namelist parameters ahisop = athkdf, whereas A_redi = ahisop if $ahisop \ne athkdf$. Again, the above fields depend only on latitude and longitude.