Ambient hydrocarbon monitoring in Lake County, Indiana
Methane (CH4) and non-methane organic compounds (NMOC) concentrations were measured in atmospheric air in East Chicago, Indiana for a period of one year starting August 1981 using Bendix 8202 reactive hydrocarbon analyzer. Data on ozone, oxides of nitrogen, temperature, wind speed, and direction were collected from available sources. Monitoring data were collected on hourly basis and then processed to calculate daily and monthly averages. Methane concentration was highest in August (2ppm) and decreased to 0.8 ppm in Dec. and stayed low in winter months before starting to increase in spring, yearly average being 1.3 ppm. Similarly, NMOC concentration also decreased with temperature and was lower than 0.24 ppm for 8 months (Sept. to April). Summer months (May to August) showed high ambient NMOC with an annual average of 0.5 ppm. Morning (6-9 am) NMOC concentration was consistently higher than afternoon (12-4 pm) concentration. Similarly NOX also decreased in the afternoon but ozone concentration was significantly higher at 12-4 pm than at 6-9 am indicating a trend that NMOC and NOX contribute to the increased ozone concentration. Temperature showed high positive correlations with CH4, NMOC, and 03 but negative correlation with NOX.
- Research Organization:
- City of East Chicago, East Chicago, Indiana
- OSTI ID:
- 6945316
- Report Number(s):
- CONF-830617-
- Journal Information:
- Proc., Annu. Meet., Air Pollut. Control Assoc.; (United States), Vol. 83-24.6; Conference: 76. annual meeting of the Air Pollution Control Association, Atlanta, GA, USA, 19 Jun 1983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AIR QUALITY
MONITORING
METHANE
ECOLOGICAL CONCENTRATION
NITROGEN OXIDES
ORGANIC COMPOUNDS
OZONE
AIR POLLUTION MONITORS
DAILY VARIATIONS
EXPERIMENTAL DATA
HOURLY VARIATIONS
INDIANA
MONTHLY VARIATIONS
SEASONAL VARIATIONS
TEMPERATURE MEASUREMENT
URBAN AREAS
VELOCITY
WIND
ALKANES
CHALCOGENIDES
DATA
ENVIRONMENTAL QUALITY
FEDERAL REGION V
HYDROCARBONS
INFORMATION
MEASURING INSTRUMENTS
MONITORS
NITROGEN COMPOUNDS
NORTH AMERICA
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
USA
VARIATIONS
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)