INPUT ALTITUDES NOT IN ASCENDING ORDER when IMMAX<0

[drbel8]

Hello,
in my INPUT_RRTM file I'm setting IMMAX<0 (IBMAX is also <0) but I'm getting
INPUT ALTITUDES NOT IN ASCENDING ORDER

I tried to set ZM to 0.0; to ascending altitude as well as to leave the field empty, the PM field is descending.

The same INPUT_RRTM works correctly with RRTM_LW
Do you have any suggestion?

INPUT_RRTM.txt

[mjiacono]

Thanks for reporting this issue. There is an oversight in RRTMG_LW that doesn't appear in RRTM_LW because the interfacing to the INPUT_RRTM file is somewhat different. For now, a quick fix involves making two small changes to source module rrtmg_lw.1col.f90: 1) at line 793, add "gravc" to the end of common block "consts", and 2) at line 906 add a line that defines gravc as "gravc = grav * 1.e02". This addition of the gravity constant (in units of cm/s2) will allow the code to correctly specify altitudes from the input pressure values. We will add this correction to a future release.

[drbel8]

Thank you, I confirm this solved my issue.