Prescribe dust and sea salt aerosols in CAM6

[Lian Xue]

Hi all~

I'm trying to prescribe the dust and sea salt aerosol in two runs with F2010climo compsets, since I hope these two species remain the same when making comparisons. I set the prescribed_aero_nl group in user_nl_cam file as follows:

&prescribed_aero_nl
prescribed_aero_cycle_yr = 2000
prescribed_aero_datapath = '$CESMinputdatapath/atm/cam/chem/trop_mam/aero'
prescribed_aero_file = 'mam3_1.9x2.5_L30_2000clim_c130319.nc'
prescribed_aero_specifier = 'dst_c1', 'ncl_c1','ncl_c2','dst_c3', 'ncl_c3','dst_a1_logm', 'ncl_a1_logm', 'ncl_a2_logm', 'dst_a3_logm', 'ncl_a3_logm', 'dst_a1_logv', 'ncl_a1_logv', 'ncl_a2_logv', 'dst_a3_logv', 'ncl_a3_logv'
prescribed_aero_type = 'CYCLICAL'
prescribed_aero_model = 'modal'

But it turns out that this didn't work, since the dust and sea salt show large inconsistency with both the input mam3 nc file and each other. Did I mismanage it?

Many thanks to all!

 

[peverley]

Moving this to the CAM-CHEM board in the hopes they can answer your question!

 

[AshaJain]

I think you can shut off prognostic dust model calculations by setting the dust_emis_fac namelist variable to a large value. This variable divides the dust emissions computed in the land model. There may be something similar for sea salt. From here, you can specify your own dust surface emissions and set the surface emissions to "cyclical"