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%
WICA1 20% Best 3.11 0.93 1.54 0.80 0.26 1.16 7.80   39.9% 11.9% 19.8% 10.2% 3.4% 14.8%
WICA1 Middle 60% 7.19 2.01 3.77 1.25 0.51 2.22 16.96   42.4% 11.8% 22.3% 7.4% 3.0% 13.1%
WICA1 20% Worst 15.19 7.06 10.99 3.00 0.90 3.74 40.89   37.2% 17.3% 26.9% 7.3% 2.2% 9.1%
WICA1 Average 8.03 2.83 4.82 1.52 0.54 2.32 20.07   40.0% 14.1% 24.0% 7.6% 2.7% 11.6%