How to change the surface albedo in CLM4.5

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I am curious about the albedos in CLM4.5 because there ar so many different albedos are used: Visible direct beam, Visible diffuse bean, Near-IR direct beam, and Near-IR diffuse beam, so how to compare the simulated albedo with the observation(Surface Albdeo = (FSDS-FSNS)/(FSDS)FSDS: Downwelling solr flux at the surfaceFSNS: Net Solar Flux at the surface.) ?Just calculated from the simulated solar radiation and the reflected radoation( the broadband flux albedo)?If I want to change the albedo, where should I start with?It will be very appreciated if anyone could give me some suggestions.Thank you very much.