Does prognostic field "mass thickness of layers" already exist in lfric_apps

[alanjhewitt]

I am able to wastefully pass lots of fields into radaer to calculate this value, but am wondering if instead this field already exists somewhere as a prognostic.

It went by several different variable names in the UM, e.g
atm%mass (in set_aer.F90)

It is currently calculated in lfric_apps in set_thermodynamic_kernel_mod.f90 (d_mass) as well

[iboutle]

In short, no.

d_mass in set_thermodynamic is the equivalent to atm%mass in the UM. The ordering is currently a bit wrong to use this in radaer (it's calculated after radaer is called). You could possibly do some restructuring of the code so that set_thermodynamic is called before radaer, and then pass d_mass into radaer. I'm not sure this would be of huge benefit though - the cost of recalculating it is probably tiny.