AERMOD air Articles
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Sensitivity of the AERMOD air quality model to the selection of land use parameters
AERMOD is a new, advanced plume dispersion model that the U.S. Environmental Protection Agency (EPA) is expected to propose for regulatory use. It is intended to replace ISCST3 for most modeling applications. AERMOD is the result of an effort to incorporate scientific knowledge gained over the last three decades into regulatory plume models. AERMOD requires, as input, three site-specific land use ...
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Dispersion of buoyant emissions from low level sources in urban areas: water channel modelling
A laboratory study was done to investigate dispersion of buoyant emissions from near surface sources in urban areas. Ground level concentrations under different surrounding building geometries were measured using a newly developed system based on laser induced fluorescence. In the presence of upstream buildings AERMOD (AMS/U.S. EPA regulatory dispersion model) is unable to explain concentrations ...
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Aermod View - Upper Air Data Modifications with Aermet
The AERMET meteorological data pre-processor contains many different features designed to aid users in performing quality control tasks as data are processed. This includes the ability to audit specific variables, modify valid data ranges, and more. One feature built into AERMET’s Upper Air Pathway is designed to check for potential problems within the sounding and potentially correct ...
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A new model validation database for evaluating AERMOD, NRPB R91 and ADMS using krypton-85 data from BNFL Sellafield
The radioisotope krypton-85 (85Kr) is emitted into the atmosphere from nuclear fuel reprocessing plant. Releases from the BNFL Sellafield complex have been used to evaluate the performance of regulatory atmospheric dispersion models. Field measurements of 85Kr, associated emissions and meteorological data and dispersion model predictions have been collated into a model validation database that ...
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`Sensitivity of the AERMOD Air Quality Model to the Selection of Land Use Parameters,` prepared for a 1999 air pollution conference in San Francisco, CA
Abstract AERMOD i: a neiv, advanced pl.ir* ."ispersicn rcd*l that "h* U.S. Envircn-nerta Prc:*c::on Agency (EPA) is expected to propose for regulatory use. It is intended to replace ISCST3 for most modeling applications. AERMOD is the result of an effort to incorporate scientific knowledge gained over the last three decades into regulatory plume models. AERMOD requires, as input, three ...
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Modeling Tip: How to import model objects from AERMOD-related files into BREEZE AERMOD
BREEZE AERMOD provides modelers with the ability to import model objects from existing AERMOD related files. The supported files include EPA AERMOD and ISC input files (.dat), BREEZE AERMOD input files (.ami), source files (.pnt), receptor files (.rec), and building files (.bld). With these file types, users can import model object data including, but not limited to, locations, exit temperatures, ...
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Managing air quality during regulatory changes
This paper discusses the regulatory and technical issues associated with the revisions to the US EPA Guideline on Air Quality Models. The proposed guideline includes the models AERMOD, CALPUFF, and ISC-PRIME, all of which contain significant technical improvements over prior models. Differences in modelling requirements are appearing as regulatory agencies and industries use technically superior ...
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ALL4 Air Quality Modeling Update
As it’s been over a year since my last air quality modeling-related 4TR article, I thought it appropriate to provide a general status report on the air quality modeling updates that have occurred over the last year. There are a number of items that warrant discussion around their updates and the potential impacts on the regulated community, specifically: A new version of U.S. ...
By All4 Inc.
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`Revising Louisiana State Air Quality Modeling Guidance for the Incorporation of AERMOD,` presented at the 2006 A&WMA annual conference
Abstract For over two decades, the Industrial Source Complex (ISC) dispersion model has been the primary model used to predict ambient air impacts from stationary sources. Recent advances in dispersion modeling theory have resulted in the creation of a new type of modeling algorithm referred to as the American Meteorological Society/U.S. Environmental Protection Agency Regulatory Modeling System ...
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`Arkansas Air Permitting Issues Update,` presented at the 2006 AEF conference
Chuck’s On The Horizon Issues AERMOD Proper use of terrain andmet data NSR Reform Proposal Debottlenecking Aggregation Netting Dispersion Modeling Update On November 9, 2006, AERMOD willreplace ISC as the approved RegulatoryGuideline Model (Guideline on Air QualityModels, 40 CFR 51 Appendix W) AERMOD is similar to ISC, but requiresmore extensive input, e.g., ...
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`Sensitivity of Aermod to meteorological data sets based on varying surface roughness,` presented at the 2009 air & waste management association`s annual conference
Abstract Dispersion modeling in support of regulatory programs for federal, regional, state and localpermitting relies on the U.S. Environmental Protection Agency’s AERMOD Model as specifiedin the Guideline on Air Quality Models (40 CFR 51, Appendix W).1 Internal calculations inAERMOD for daytime mixing in the convective boundary layer and night time mixing in thestable boundary layer rely ...
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Modeling Tip: How to Import BREEZE AERMOD files into BREEZE Risk Analyst for Human Health Risk Assessments
Humans can be exposed to hazardous air pollutants (HAPs) either directly through inhalation or indirectly through ingestion or dermal contact, which can result in acute or chronic health effects. The risk of exposure varies depending on a number of variables, including the meteorological conditions, local geographical and emissions characteristics, the age of the individuals being exposed, and ...
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U.S. EPA Releases 1-Hour NO2 NAAQS Modeling Guidance
The U.S. EPA Air Quality Modeling Group (AQMG) recently released a new guidance document for NO2 modeling. The document outlines procedures that can be used to calculate the NO2 design values for comparison to the new 1-hour NO2 National Ambient Air Quality Standard (NAAQS). The new 1-hour NO2 standard of 100 ppb goes into effect on April 12, 2010. This 1-hour NO2 standard is based on the ...
By All4 Inc.
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AERMOD View - Debug Output Files
When conducting an air dispersion modeling analysis with the AERMOD modeling system, modelers may encounter situations where they want to validate or verify the model’s calculations. To support this, the model has the ability to generate Debugging Output Files of intermediate calculation results. This is controlled by the Control Pathway using the DEBUGOPT model keyword. As the ...
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Comparison of AERMOD and EIAA with respect to the Alaska tracer data
This paper inter-compares the performance of AERMOD and EIAA (the current Chinese regulatory model) against the Alaska tracer field experiment. The predicted maximum arc-wise Ground Level Concentrations (GLC) are compared with the observed tracer field data. The scatter plots, QQ plots, and residual plots are examined. EIAA frequently underestimates the GLC because it lacks any downwash ...
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AERMOD Versus CTDMPLUS: A Complex Terrain Case Study
ABSTRACT The American Meteorological Society/U.S. Environmental Protection Agency (AMS/EPA) Regulatory Model Improvement Committee (AERMIC) has updated the Industrial Source Complex (ISC) air dispersion model. The AERMIC model (AERMOD) is capable of predicting ambient pollutant concentrations in simple terrain and elevated terrain. The complex terrain capabilities of AERMOD are of particular ...
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Computer simulated versus observed NO2 and SO2 emitted from elevated point source complex
ISC-AERMOD dispersion model was used to predict air dispersion plumes from an diesel power plant complex. Emissions of NO2 and SO2 from stacks (5 numbers) and a waste oil incinerator were studied to evaluate the pollutant dispersion patterns and the risk of nearby population. Emission source strengths from the individual point sources were also evaluated to determine the sources of significant ...
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Comparison of Two Dispersion Models: A Bulk Petroleum Storage Terminal Case Study
In 65 FR 21506 (dated April 21, 2000), the United States Environmental Protection Agency (U.S. EPA) proposed revisions to its air dispersion modeling guidance, found in 40 CFR 51, Appendix W (“Guideline on Air Quality Models”) that included replacing the Industrial Source Complex (ISC) model with the American Meteorological Society (AMS) / EPA Regulatory Model (AERMOD) as the regulatory default ...
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Comparison of Two Dispersion Models: A Bulk Petroleum Storage Terminal Case Study
In 65 FR 21506 (dated April 21, 2000), the United States Environmental Protection Agency (U.S. EPA) proposed revisions to its air dispersion modeling guidance, found in 40 CFR 51, Appendix W (“Guideline on Air Quality Models”) that included replacing the Industrial Source Complex (ISC) model with the American Meteorological Society (AMS) / EPA Regulatory Model (AERMOD) as the regulatory default ...
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`Comparison of Two Dispersion Models: A Bulk Petroleum Storage Terminal Case Study,` presented at AWMA 2004 annual conference
Abstract In 65 FR 21506 (dated April 21, 2000), the United States Environmental Protection Agency (U.S. EPA) proposed revisions to its air dispersion modeling guidance, found in 40 CFR 51, Appendix W ("Guideline on Air Quality Models") that included replacing the Industrial Source Complex (ISC) model with the American Meteorological Society (AMS) / EPA Regulatory Model (AERMOD) as the regulatory ...
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