CAM5 physics with "-chem none"?

[chris_fletcher@utoronto_ca]

Hi, is it possible to build standalone CAM5 with "-chem none", i.e. without prognostic chemistry of any kind?

I can build and run fine using the default (-chem trop_mam3) but when I try to build with -phys cam5 -chem none I get many undefined symbol errors during linking, for example:

ld: 0711-317 ERROR: Undefined symbol: .__mo_ghg_chem_NMOD_ghg_chem_timestep_init
ld: 0711-317 ERROR: Undefined symbol: &&N&@chem_mods
ld: 0711-317 ERROR: Undefined symbol: .__mz_aerosols_intr_NMOD_mz_aero_initialize
ld: 0711-317 ERROR: Undefined symbol: .__modal_aero_initialize_data_NMOD_modal_aero_initialize
ld: 0711-317 ERROR: Undefined symbol: &&N&@mo_tracname
​

Thanks in advance.

 

[eaton]

The cam5 physics package assumes the presence of prognostic modal aerosols via the trop_mam3 chemistry package.

We plan sometime this summer or fall to provide the option of using prescribed modal aerosols. This is expected to make cam5 about half as expensive as the current version with fully prognostic modal aerosols.