ext_frc_specifier several emissions files for one specie

Hi evryone

I have a doubt abourt the way to indicate the emissions thatwould take into account for one specie when I indicate that in external forcing in the user_nl_cam.

For example it is posible to put two emissions file for one species? Like this:'so4_a1 -> /home/abossolasco/CESM2/Emiss_cmip6/ext_forcing/so4_a1_vertical_anthro_25x19_AB.nc, /home/abossolasco/CESM2/Emiss_cmip6/ext_forcing/so4_a1_bb_vertical_25X19_2000-2015.nc',

The model will understand that should take this two files for the emissions of SO4?

or it is not possible to do in this way and I need just put one file with all the emissions.

I really appreciate your helpAdriana
 
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