Weekend/weekday differences in oxidants and their precursors. Final report

Technical Report · Thu Mar 01 04:00:00 EST 1979

OSTI ID:5476454

Horie, Y; Cassmassi, J; Lai, L; Gurtowski, L

Differences between weekend and weekday oxidant and oxidant precursor concentrations in the Northeastern United States are examined. Statistical tests are employed to assess whether any differences in daily maximum oxidant concentrations are significant. Weekend/weekday differences in meteorology are also examined for any potential impact on weekend/weekday differences in oxidants. Oxidant concentrations are adjusted in an attempt to account for variations in meteorology, and weekend/weekday differences in the adjusted values are examined. Finally, statistical tests are used to determine significant differences in early morning oxidant precursor concentrations. The analyses revealed that oxidant concentrations downwind of major urban areas tend to be lower on weekends. However, the reductions are not as large as those observed in precursor concentrations within the major urban areas. Reductions in weekend oxidant concentrations at locations within the major urban areas are not as great as those at downwind locations.

• Research Organization: Technology Service Corp., Santa Monica, CA (USA)
• OSTI ID: 5476454
• Report Number(s): PB-300479
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
AIR QUALITY
CHALCOGENIDES
DAILY VARIATIONS
ENVIRONMENTAL QUALITY
MATHEMATICS
METEOROLOGY
NITROGEN COMPOUNDS
NITROGEN OXIDES
NORTH AMERICA
NORTH ATLANTIC REGION
OXIDES
OXIDIZERS
OXYGEN COMPOUNDS
OZONE
POLLUTION
STATISTICS
URBAN AREAS
USA
VARIATIONS
WIND