Observations l l Ozone Drops for All Days, All Sites Ozone Control Program Less Effective on Weekends in So. CAB and SFBAAB No Weekend Effect in Sacramento PM Higher on Weekdays
Cause and Effect Hypotheses l l “NOX Disbenefit” » less truck traffic on weekend » less NOX and soot “NOX Limitation” » similar VMT (but later on weekends) » more ozone production from NOX “Overnight Carryover” » Friday and Saturday night traffic “Increased Weekend Emissions” » diurnals, home, recreation
“Increased Weekend Emissions” l l l l Diurnal Evaporatives SUVs Friday Gasoline Power Generation House Painting Home Solvents Lawn and Garden l l l Biogenic VOC Motorcycles Boats and Jet Skis Private Airplanes Barbecues Fast Food Preparation
Cause and Effect Research l l l Complementary Approaches » data analysis » emission activity and inventories » air quality modeling Analyze Existing Data by 2000 AQMP » primarily data analysis » So. CAB has most available data Analyze New Data by 2003 SIPs » primarily EI and modeling
Air Quality Data Analysis Research l l l Characterize WE Effect » ozone, high ozone, PM, trends Diurnal Profiles » ozone, NOX, CO, HC, PM Traffic Activity Patterns Overnight Carryover » surface, elevated, aloft HC Speciation by Day of Week Final Report
Emission Inventory Needs l l l Monday to Thursday Similar Friday, Saturday, Sunday Source Information » truck traffic on weekends » diurnals, home, recreation Temporal Information » Friday and Saturday night traffic » weekend VMT later in day Spatial Information » weekend VMT further downwind
Скачать презентацию Observations l l Ozone Drops for All Days
f8128da5447c1597fc4a9494f22ac5e0.ppt