# How to calculate aerosol radiative forcing in CMAQ

Hi all,
I would like to ask how can we calculate aerosol radiative forcing based on CMAQ outputs. I note that it has been described as “The radiative transfer scheme CAMRT applied in CAM3 (William et al., 2006) and CAM4 (released in April, 2010) was used to calculate the aerosol direct radiative forcing in both clear-sky and all-sky cases in this scheme.” It seems that we should calculate the radiative forcing by ourselves and CMAQ does not directly output the radiative forcing. Am I right?
If so, may I ask which scheme would be well-suited for calculating aerosol radiative forcing based on CMAQ outputs?