Hi every one , I am a new user of WRF-CHEM working on dust scheme, I used chem_opt:300 and 301 and dust-opt of AFWA, the result is near correct, 5 dust bins and pm2.5 and pm10 are created, but I have just a field AOD-OUT which is zero,could you help me please to extract AOD outputs, I attached my name list also. my second question about dust load in my region, If I want to extract dust load in post processing I must sum 5 dust bins in all vertical layers unless the last vertical layer(e_vert)?