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Record Search Query: ServiceParameters>MODELS>REGULATORY MODELS

AERMOD Modeling System
Entry ID: AERMOD_Model
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Summary
Abstract: (Summary adapted from EPA.)

The American Meteorological Society/Environmental Protection Agency Regulatory
Model Improvement Committee (AERMIC) was formed to introduce state-of-the-art
modeling concepts into the EPA's air quality models. Through AERMIC, a modeling
system, AERMOD, was introduced that incorporated air dispersion based on
planetary boundary layer turbulence structure and scaling concepts, including
treatment of both surface and elevated sources, and both simple and complex
terrain.

There are two input data processors that are regulatory components of the
AERMOD modeling system: AERMET, a meteorological data preprocessor that
incorporates air dispersion based on planetary boundary layer turbulence
structure and scaling concepts, and AERMAP, a terrain data preprocessor that
incorporates complex terrain using USGS Digital Elevation Data. Other
non-regulatory components of this system include: AERSCREEN, a screening
version of AERMOD, and AERSURFACE, a surface characteristics preprocessor.

http://www.epa.gov/scram001/dispersion_prefrec.htm#aermod

Related URL
Link: VIEW PROJECT HOME PAGE
Description: Support Center for Regulatory Air Models Home Page.

Link: GET SERVICE > GET SOFTWARE PACKAGE
Description: Model is available for download from here.

Link: GET RELATED SERVICE METADATA (SERF)
Description: ISC3 is a steady-state Gaussian plume model which can be used to assess
pollutant concentrations from a wide variety of sources associated with an
industrial complex. This model can account for the following: settling and dry
deposition of particles; downwash; point, area, line, and volume sources; plume
rise as a function of downwind distance; separation of point sources; and
limited terrain adjustment. ISC3 operates in both long-term and short-term
modes. The screening version of ISC3 is SCREEN3. ISC3 also uses the Emissions
Modeling System for Hazardous Pollutants (EMS-HAP) to process an emission
inventory for input into the model. The Building Profile Input Program (BPIP)
and the Building Profile Input Program for PRIME (BPIPPRM) can also be used
with ISC3 to correctly calculate building heights (bh) and projected building
widths (pbw) for simple, multi-tiered, and groups of structures.

Link: VIEW RELATED INFORMATION
Description: Users Guide of AERMOD available here in PDF format.

Link: VIEW RELATED INFORMATION
Description: Dispersion modeling uses mathematical formulations to characterize the
atmospheric processes that disperse a pollutant emitted by a source. Based on
emissions and meteorological inputs, a dispersion model can be used to predict
concentrations at selected downwind receptor locations. These air quality
models are used to determine compliance with National Ambient Air Quality
Standards (NAAQS), and other regulatory requirements such as New Source Review
(NSR) and Prevention of Significant Deterioration (PSD) regulations. These
models are addressed in Appendix A of EPA's Guideline on Air Quality Models
(also published as Appendix W of 40 CFR Part 51), which was originally
published in April 1978 to provide consistency and equity in the use of
modeling within the U.S. air quality management system. These guidelines are
periodically revised to ensure that new model developments or expanded
regulatory requirements are incorporated.

Link: VIEW RELATED INFORMATION
Description: Receptor Models

Receptor models are mathematical or statistical procedures for identifying and
quantifying the sources of air pollutants at a receptor location. Unlike
photochemical and dispersion air quality models, receptor models do not use
pollutant emissions, meteorological data and chemical transformation mechanisms
to estimate the contribution of sources to receptor concentrations. Instead,
receptor models use the chemical and physical characteristics of gases and
particles measured at source and receptor to both identify the presence of and
to quantify source contributions to receptor concentrations. These models are
therefore a natural complement to other air quality models and are used as part
of State Implementation Plans (SIPs) for identifying sources contributing to
air quality problems. The EPA has developed the Chemical Mass Balance (CMB) and
UNMIX models as well as the Positive Matrix Factorization (PMF) method for use
in air quality management. CMB fully apportions receptor concentrations to
chemically distinct source-types depending upon the source profile database,
while UNMIX and PMF internally generate source profiles from the ambient data.
Service Citation
Title: AERMOD Modeling System
Provider: EPA
Edition: Version 04300 with PRIME
URL: http://www.epa.gov/scram001/dispersion_prefrec.htm#aermod
ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
ENVIRONMENT
Use Constraints
This rule became effective December 9, 2005. One year after this date, the new
model - AERMOD - should be used for appropriate application as replacement for
ISC3. During this one-year period, protocols for modeling analyses based on
ISC3 which are submitted in a timely manner may be approved at the discretion
of the appropriate Reviewing Authority. Applicants are therefore encouraged to
consult with the Reviewing Authority as soon as possible to assure acceptance
during this period.
Service Provider
Support Center for Regulatory Air Models, Technology Transfer Network, U.S. Environmental Protection Agency

Service Provider Personnel
Name: DENNIS ATKINSON
Phone: 919-541-0518
Fax: 919-541-0044
Email: atkinson.dennis at epa.gov
Contact Address:
US EPA
Office of Air Quality Planning and Standards (OAQPS)
Technology Transfer Network
Mail Code D143-02
City: Research Triangle Park
Province or State: NC
Postal Code: 27711
Country: USA
Distribution Media
Distribution_Media: Electronic/Download
Distribution_Size: 53KB
Distribution_Format: zip
Fees: None
Personnel
DENNIS ATKINSON
Role: TECHNICAL CONTACT
Phone: 919-541-0518
Fax: 919-541-0044
Email: atkinson.dennis at epa.gov
Contact Address:
US EPA
Office of Air Quality Planning and Standards (OAQPS)
Technology Transfer Network
Mail Code D143-02
City: Research Triangle Park
Province or State: NC
Postal Code: 27711
Country: USA

TYLER B. STEVENS
Role: SERF AUTHOR
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA
Creation and Review Dates
SERF Creation Date: 2006-03-10
SERF Last Revision Date: 2007-05-31
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