Table 1. τ and τa at 550 nm for BC and OC in original and modified climatologies
Koch Chin
τ τa τ τa
Original BC 0.003 0.0016 0.005 0.0029
Climatology OC 0.016 0.0005 0.012 0.0004
Multiplying BC 3.8 3.8 2.2 2.2
Factor OC 1.6 1.6 1.8 1.8
Inferred BC 0.010 0.0060 0.011 0.0064
Amount OC 0.025 0.0008 0.022 0.0007