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%
WHRI1 20% Best 1.44 0.34 0.70 0.45 0.09 0.33 3.34   43.1% 10.1% 20.8% 13.3% 2.7% 10.0%
WHRI1 Middle 60% 3.62 0.97 2.16 0.82 0.37 1.25 9.19   39.4% 10.6% 23.5% 9.0% 4.0% 13.6%
WHRI1 20% Worst 6.18 1.60 8.08 2.06 1.31 2.97 22.20   27.8% 7.2% 36.4% 9.3% 5.9% 13.4%
WHRI1 Average 3.72 0.98 3.09 1.00 0.51 1.43 10.73   34.7% 9.1% 28.8% 9.4% 4.7% 13.3%