PPT Slide
Sites: South Coast, South Central Coast, Mojave Desert
Sample collection: Once per 6 days
Time resolution: 24hours (midnight - midnight)
Gas phase: match CO, NOx, O3 to 24-hour PM time resolution on PM days
Size fraction: PM10 and TSP
Data analysis: split by season (Oct-Mar or Apr-Sep)
10+ years data at 70% completeness (21 days/season/year)
15 CO, 17 NOx, 25 O3, 9 PM10, 26 TSP sites
Sparse data, high variability. Seasonality and time trends.
Significant (p < 0.01) decreases of CO, NOx, PM10, TSP from WD to WE
Significant (p < 0.01) increases of ozone from WD to WE
Nonsignificant and variable changes of PM and TSP nitrate