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%
MELA1 20% Best 4.09 1.28 2.14 0.73 0.40 2.40 11.05   37.0% 11.6% 19.4% 6.7% 3.7% 21.7%
MELA1 Middle 60% 9.26 5.19 3.93 1.29 0.62 3.57 23.87   38.8% 21.7% 16.5% 5.4% 2.6% 15.0%
MELA1 20% Worst 18.52 16.18 7.22 2.28 0.88 4.70 49.78   37.2% 32.5% 14.5% 4.6% 1.8% 9.4%
MELA1 Average 10.17 6.70 4.26 1.39 0.63 3.58 26.74   38.0% 25.1% 15.9% 5.2% 2.4% 13.4%