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%
ZION1 20% Best 2.21 0.90 1.70 1.25 0.34 1.29 7.70   28.7% 11.7% 22.1% 16.2% 4.5% 16.8%
ZION1 Middle 60% 4.56 2.00 3.17 1.74 0.83 2.83 15.15   30.1% 13.2% 21.0% 11.5% 5.5% 18.7%
ZION1 20% Worst 6.18 7.56 6.12 2.50 1.63 5.54 29.52   20.9% 25.6% 20.7% 8.5% 5.5% 18.8%
ZION1 Average 4.46 2.74 3.44 1.79 0.89 3.05 16.37   27.3% 16.8% 21.0% 11.0% 5.4% 18.6%