Chemical and meteorological conditions associated with high and low ozone concentrations in southeastern Michigan and nearby areas of Ontario

Journal Article · Sat Feb 01 04:00:00 EST 1986 · J. Air Pollut. Control Assoc.; (United States)

DOI:https://doi.org/10.1080/00022470.1986.10466053· OSTI ID:5694444

Kelly, N A; Ferman, M A; Wolff, G T

A characterization of the photochemistry and transport of ozone in the Detroit metropolitan area is presented. It provides a basis for comparing data for Detroit to that for other cities. The characterization is based on a comprehensive set of meteorological and chemical measurements obtained at a site in the urban core of Detroit during the summer of 1981, together with measurements of O/sub 3/, nitrogen oxides (NO/sub x/); and nonmethane organic compounds (NMOC) from rural, suburban, and urban areas in southeastern Michigan and adjacent areas of Ontario. For the quartile (23 days) with highest ozone maxima (97-180 ppb), the maxima occurred 10-70 km north-northeast of the city on days that were warm and hazy with light south-southwest winds. On such days there was a marked accumulation of ozone precursors (NMOC and NO/sub x/) in the early morning, as well as a rapid chemical removal of NO/sub x/ (NO/sub x/ half-life of approx.5 h) from morning to midday. The timing of the daily ozone increase across the study region suggests that local photochemical generation in a moving plume was responsible for more than half of the ozone measured downwind. However, there was also evidence that ozone transported into Detroit as part of the regional background was a significant part of the O/sub 3/ maxima on high ozone days. The average contributions of photochemistry and transport for the 23 days with the highest ozone maxima were estimated to 57 ppb and 47 ppb, respectively.

• Research Organization: General Motors Research Labs., Warren, MI
• OSTI ID: 5694444
• Journal Information: J. Air Pollut. Control Assoc.; (United States), Journal Name: J. Air Pollut. Control Assoc.; (United States) Vol. 36:2; ISSN JPCAA
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
ATMOSPHERIC CHEMISTRY
CANADA
CHALCOGENIDES
CHEMISTRY
CORRELATIONS
DAILY VARIATIONS
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL TRANSPORT
FEDERAL REGION V
LONG-RANGE TRANSPORT
MASS TRANSFER
METEOROLOGY
MICHIGAN
NITROGEN COMPOUNDS
NITROGEN OXIDES
NORTH AMERICA
ONTARIO
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
OZONE
PHOTOCHEMICAL OXIDANTS
PHOTOCHEMISTRY
PLUMES
POLLUTION
POLLUTION SOURCES
RURAL AREAS
URBAN AREAS
USA
VARIATIONS
WIND