Sensitivity analysis of a nested-ozone air-quality model

Technical Report · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5480403

Sistla, G; Rao, S T; Godowitch, J

A series of Urban Airshed Model (UAM) simulations were performed using inputs derived from Regional Oxidant Model (ROM) data files. The gridded ROM results employed in the UAM simulations included concentrations for specifying initial and boundary conditions, wind fields, other meteorological and surface geophysical parameters, and biogenic emissions. Two approaches were applied to nest the 3-D UAM grid (a four and a five level scheme) inside the regional model grid framework. The model sensitivity study was conducted with the variation in a single gridded input parameter or method in order to assess the impact on ozone concentrations for different high ozone days during 1980 over a domain covering the greater New York metropolitan area. Differences in the domain peak ozone and maximum ozone concentration at individual grid cells from the sensitivity runs are compared to base case simulations for each day. Maximum ozone levels were examined for different wind fields, with/without surface land use for the dry deposition method, with/without biogenic emissions, and the number of UAM vertical levels and nesting approach for initial and boundary concentrations. The magnitudes of peak ozone concentration changes from several sensitivity simulations were found to be comparable to those obtained from previous model runs with emissions control strategy reductions for the greater New York City urban domain.

• Research Organization: Environmental Protection Agency, Cincinnati, OH (United States). Office of Environmental Criteria and Assessment
• OSTI ID: 5480403
• Report Number(s): PB-91-191221/XAB; EPA--600/D-91/085
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION
AIR POLLUTION MONITORING
AIR QUALITY
DEVELOPED COUNTRIES
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL QUALITY
FEDERAL REGION II
FUNCTIONS
MATHEMATICAL MODELS
NEW YORK
NORTH AMERICA
OZONE
POLLUTION
RESPONSE FUNCTIONS
SENSITIVITY ANALYSIS
THREE-DIMENSIONAL CALCULATIONS
URBAN AREAS
USA