Science & Technology
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November 15, 2012 LT2 Public Meeting
Announcement and meeting materials for November 15, 2012 Public Meeting: Concerning Monitoring, Binning and Microbial Toolbox Information
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December 7, 2011 LT2 Public Meeting
Describes meeting materials from December 7, 2011 public meeting about LT2 Rule Review
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9th Conference on Air Quality Modeling
The 10th Conference on Air Quality Modeling, mandated by Section 320 of the Clean Air Act, held on the EPA RTP Campus from March 13th through 15th, 2012. This is a public hearing on regulatory air quality model and technique development.
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SCRAM Surface Meteorological Archived Data
SCRAM Archived Data (TD-1440) are compressed WBAN Hourly Surface Observations (TD-1440) format data.
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7th Conference on Air Quality Modeling
The 10th Conference on Air Quality Modeling, mandated by Section 320 of the Clean Air Act, held on the EPA RTP Campus from March 13th through 15th, 2012. This is a public hearing on regulatory air quality model and technique development.
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8th Conference on Air Quality Modeling
The 10th Conference on Air Quality Modeling, mandated by Section 320 of the Clean Air Act, held on the EPA RTP Campus from March 13th through 15th, 2012. This is a public hearing on regulatory air quality model and technique development.
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SCRAM Mixing Height Data
Mixing Height data are used with surface meteorological upper air data. Upper air data are meteorological data that are measured in the vertical layers of the atmosphere.
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State Implementation Plan (SIP) Attainment Demonstration Guidance
how to prepare attainment demonstrations for National Ambient Air Quality Standards (NAAQS) and the Regional Haze Rule using air quality modeling and other relevant technical analyses.
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Multipollutant Modeling Applications
2002 multi-pollutant modeling platform
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Photochemical Modeling Applications
Provides access to modeling applications involving photochemical models, including modeling of ozone, particulate matter (PM), and mercury for national and regional EPA regulations such as the Clean Air Interstate Rule (CAIR) and the Clean Air Mercury Rule
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Air Quality Models - Clarification Memos for Dispersion Models
Memoranda issued by EPA as general clarifications for issues related to Appendix W and technical aspects of dispersion models, when necessary.
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Air Modeling - Meteorological Guidance
Meteorological guidance for the use of observational data in permit modeling, monitoring for modeling applications, and other related data procedures and quality assurance
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AERMOD Modeling System Development
AERMOD Model System development plans and ongoing research, which is summarized in a series of White Papers.
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Meteorological Processors and Accessory Programs
Surface and upper air data, provided by NWS, are important inputs for air quality models. Before these data are used in some of the EPA dispersion models, meteorological processors are used to manipulate the data.
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Air Quality Dispersion Modeling - Related Model Support Programs
Programs and utilities that are used in support of some of the dispersion models listed here. Note that utilities designed for use with particular models will be found with those models.
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Air Quality Dispersion Modeling - Screening Models
Models that are often applied before applying a refined air quality model to determine if refined modeling is needed.
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Nitrogen Dioxide/Nitrogen Oxide In-Stack Ratio (ISR) Database
The EPA’s Guideline on Air Quality Models, Appendix W to 40 CFR Part 51, recommends a three-tiered screening approach to estimate ambient concentrations of Nitrogen Dioxide (NO2).
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Air Modeling - Observational Meteorological Data
Observed meteorological data for use in air quality modeling consist of physical parameters that are measured directly by instrumentation, and include temperature, dew point, wind direction, wind speed, cloud cover, cloud layer(s), ceiling height,
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Air Quality Model Clearinghouse
The Model Clearinghouse is a focal point for interpretation of modeling guidance in specific regulatory applications.
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Air Modeling - Announcements
Air Modeling Recent Additions