User's guide for PEM-2: Pollution Episodic Model (version 2). Final report

Technical Report · Mon Dec 01 04:00:00 EST 1986

OSTI ID:6716102

Rao, K S

The Pollution Episodic Model Version 2 (PEM-2) is an urban-scale model designed to predict short-term average ground-level concentrations and deposition fluxes of one or two gaseous or particulate pollutants at multiple receptors. The two pollutants may be non-reactive, or chemically-coupled through a first-order chemical transformation. Up to 300 isolated point sources and 50 distributed area sources may be considered in the calculations. Concentration and deposition flux estimates are made using hourly mean meteorological data. Up to a maximum of 24 hourly scenarios of meteorology may be included in an averaging period. The concentration algorithms used in PEM-2 are specially developed to account for the effects of dry deposition, sedimentation, and first-order chemical transformation. The Gaussian plume-type algorithms for point sources are derived from analytical solutions of a gradient-transfer model. The User's Guide lists the concentration algorithms and computational techniques used in the PEM-2 program, and describes the input/output parameters, optional features, capabilities, and limitations of the model. Modifications to the previous version of the model are outlined. The information in the report is directed to the model user and the programmer.

• Research Organization: National Oceanic and Atmospheric Administration, Oak Ridge, TN (USA). Atmospheric Turbulence and Diffusion Lab.
• OSTI ID: 6716102
• Report Number(s): PB-87-132098/XAB
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
AIR POLLUTION
AIR QUALITY
ALGORITHMS
COMPUTER CODES
ENVIRONMENTAL QUALITY
FORTRAN
MAGNETIC STORAGE DEVICES
MAGNETIC TAPES
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
MEMORY DEVICES
PARTICLES
PARTICULATES
POINT SOURCES
POLLUTION
PROGRAMMING LANGUAGES
RADIATION SOURCES