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%
SIAN1 20% Best 2.77 0.88 3.03 1.57 0.43 1.09 9.76   28.4% 9.0% 31.0% 16.0% 4.4% 11.1%
SIAN1 Middle 60% 5.17 1.56 5.39 1.74 1.12 3.07 18.06   28.6% 8.6% 29.8% 9.7% 6.2% 17.0%
SIAN1 20% Worst 7.77 2.49 9.27 2.43 2.30 6.09 30.35   25.6% 8.2% 30.5% 8.0% 7.6% 20.1%
SIAN1 Average 5.23 1.62 5.71 1.85 1.22 3.30 18.93   27.6% 8.5% 30.2% 9.8% 6.5% 17.4%