Dear all

I have recently modified RegCM dust module to run for five bins. I have added a fifth bin(20-60um). But I haven't made change for the optical properties(ssa and extinction). I got emission in the fifth bin.  I am not sure if it is doing right because data for optical properties is given four 4 dust bins, so why the model runs when I add a fifth bin(but no ssa and extinction values for this bin).

 And also can you please suggest me how I can get(calculate) ssa and extinction for dust.

best regards,

Netsanet