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%
THSI1 20% Best 1.79 0.36 0.73 0.33 0.04 0.45 3.70   48.3% 9.8% 19.8% 8.9% 1.1% 12.1%
THSI1 Middle 60% 6.89 1.38 4.19 1.37 0.24 1.50 15.57   44.3% 8.9% 26.9% 8.8% 1.5% 9.6%
THSI1 20% Worst 14.68 2.78 13.33 3.50 0.73 3.61 38.63   38.0% 7.2% 34.5% 9.1% 1.9% 9.3%
THSI1 Average 7.52 1.46 5.35 1.60 0.30 1.72 17.94   41.9% 8.1% 29.8% 8.9% 1.7% 9.6%