Average light extinction (1/Mm) and percentage contributions to the aerosol light extinction (Bep) of the major aerosol chemical components in 20% best, middle 60%, and 20% worst days based on data available during the year of 1997-2002

Location Data Sulfate Nitrate OMC LAC Soil CM Aerosol Ext   Sulfate% Nitrate% OMC% LAC% Soil% CM%
HECA1 20% Best 2.48 1.01 2.35 0.85 0.25 0.74 7.69   32.3% 13.1% 30.6% 11.0% 3.3% 9.7%
HECA1 Middle 60% 4.71 2.81 6.46 1.62 0.67 2.22 18.48   25.5% 15.2% 34.9% 8.8% 3.6% 12.0%
HECA1 20% Worst 10.14 29.91 11.40 3.23 0.67 1.51 56.86   17.8% 52.6% 20.0% 5.7% 1.2% 2.7%
HECA1 Average 5.36 7.90 6.64 1.79 0.59 1.79 24.07   22.3% 32.8% 27.6% 7.5% 2.4% 7.4%