How could I modify the aerosol emission size?

[Benjamin]

Hello,

I am currently working on biomass burning aerosols and their impacts.
One of the aspect i am researching at the moment is the influence of the size distribution to the optical properties.

However, it appears that the initial diameter in wrf-chem (dginin-dginia-siginin-siginia-..) may not be suited to fit the biomass burning emission size distribution observed.

Thus, I am wondering how could I modify the initial emission diameter for biomass burning aerosol without affecting the whole module.

Thanks in advance for any idea,
Cheers
Benjamin