Theoretical studies of long-range transport of oxidants. Final report
A three dimensional chemical tracer model (CTM) was developed for the long-range transport of oxidants that can predict ozone levels in rural areas. Ozone episodes occur each summer, during which a significant fraction of the United States may experience concentrations of oxidants more than the National Ambient Air Quality Standard (120 ppb). The CTM has been constructed to simulate production, transport, and deposition of O{sub 3}, NO{sub x}, and other reactive species in regions of North America. Sub-grid models were implemented to account for different chemical regimes in areas defined as rural, urban, urban plumes, and power plant plumes. Model simulations reproduce key features of available observations, indicating that the model provides a realistic climatology for concentrations of O{sub 3} and O{sub 3} precursors. The CTM represents an analytical tool uniquely suited for analysis of problems associated with means and extremes of pollutant concentrations over large areas of North America, including interactions between urban and rural environments.
- Research Organization:
- Harvard Univ., Cambridge, MA (United States)
- OSTI ID:
- 5609417
- Report Number(s):
- PB-91-182360/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION
CHALCOGENIDES
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL TRANSPORT
FORECASTING
LONG-RANGE TRANSPORT
MASS TRANSFER
MATHEMATICAL MODELS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
OZONE
POLLUTION
RURAL AREAS
URBAN AREAS