Evaluation of the PEM-2 (Pollution Episodic Model Version 2) using the 1982 Philadelphia Aerosol Field Study data base. Final report, January 1984-June 1985

Technical Report · Sat Mar 01 04:00:00 EST 1986

OSTI ID:5594542

Ku, J Y; Rao, K S

This report describes an evaluation of the Pollution Episodic Model Version 2 (PEM-2) using measurements obtained from 29 days of the Philadelphia Aerosol Field Study. The model performance was determined by comparing predicted 12-h and 24-h average concentrations against corresponding observed values at six monitoring sites for four pollutant species; particulate total mass, fine sulfate, and SO/sub 2/. A first-order chemical transformation of SO/sub 2/ to sulfate was considered, in addition to the direct emission, dry deposition, and settling of the pollutant species. The model domain covered 80km X 80km with 32 X 32 grid cells which included 300 major point sources and 289 area sources for the Philadelphia urban area. Hourly meteorological observations and hourly emissions were input to the model. Statistical measures of difference and correlation paired in time and space revealed that the particulate species were simulated closely. These results, however, must be interpreted with caution since the background concentrations exceeded the local urban source contributions. Tables of statistical and regression analyses results as well as graphical displays of predicted and observed concentrations are presented and discussed.

• Research Organization: National Oceanic and Atmospheric Administration, Oak Ridge, TN (USA). Atmospheric Turbulence and Diffusion Lab.
• OSTI ID: 5594542
• Report Number(s): PB-86-167921/XAB
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AEROSOLS
AIR POLLUTION
CHALCOGENIDES
COLLOIDS
DISPERSIONS
EVALUATION
MATHEMATICAL MODELS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
POLLUTION
SOLS
SULFATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
URBAN AREAS