Hellow people

  I got problem on the Aerosol simulation. I have run the model for all the possibilities of aerosol simulation, i.e all aerosol(10),without dust(6), dust only(4), and for he anthropogenic and biogenic components. But of the 13  chemistry outputs, I only see the result for the three variables, namely, tracer mixing ratio, Column Burden, and surface emission. When I try to see the result(with Grads) for the other variables I get  "Constant field.  Value = 0". I did the simulation for different locations but I get the same thing. Can somebody kindly tell me why I don't see the result for the other variables?

 Also the three variables I get have the same value for different simulation times. I even tried to change the emission by changing AER2=2*AER2 in the AEROSOL.f found in the ICBC directory. I got absolutely no change in the three outputs. Why is this so?

And one more thing, How can I see the effects of each component. For instance how can I see the radiative forcing of BC or OC only. 

 I hope I will get answer from someone. 

Best regards,

Netsanet