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%
WHPE1 20% Best 1.42 0.46 0.65 0.40 0.15 0.45 3.53   40.2% 13.0% 18.3% 11.4% 4.3% 12.8%
WHPE1 Middle 60% 3.75 1.08 2.18 0.94 0.49 1.22 9.67   38.8% 11.2% 22.6% 9.8% 5.1% 12.6%
WHPE1 20% Worst 6.58 1.77 6.44 2.08 1.07 2.52 20.46   32.2% 8.7% 31.5% 10.2% 5.3% 12.3%
WHPE1 Average 3.89 1.10 2.77 1.08 0.55 1.34 10.72   36.2% 10.3% 25.8% 10.0% 5.1% 12.5%