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AERMOD View

  • August 22, 2024

AERMOD View: Understanding 1-Hour NO2 & SO2 NAAQS Options

In 2010, the United States Environmental Protection Agency (U.S. EPA) revised the National Ambient Air Quality Standards (NAAQS) for short-term nitrogen dioxide (NO2) and sulfur dioxide (SO2). Due to the unique forms of these standards – which are based on annual distributions of daily maximum hourly concentrations as opposed to the distribution of all hourly values – the AERMOD air dispersion model had to be updated to perform calculations accordingly.

  • April 14, 2024

Customizing the Main Display

Lakes Software’s commercial applications all feature a similar look and feel. This familiarity allows users to easily execute a variety of air dispersion models even when accessing a brand-new product for the first time. The image below uses AERMOD View to demonstrate the key components of each Lakes Software application.

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  • March 19, 2024

AERMOD View: Counting Concentration Exceedances

When conducting an air dispersion modeling analysis, modelers may want to know not just what the value of the maximum concentration is but also how frequently concentrations exceed some upper limit or threshold. The U.S. EPA AERMOD air dispersion model comes with an option to extract these exceedances: the Threshold Violation File or MAXIFILE. Lakes Software’s AERMOD View application goes a step further and automatically counts those exceedances so that modelers can easily determine the frequency of such violations.

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  • February 20, 2024

AERMOD View: Concentration Converter

We previously discussed a fundamental limitation of the CALPUFF modeling system which places finite limits on how many objects and calculations the various system executables can handle in a single project.

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  • December 18, 2023

AERMOD View: Import Elevations from AERMAP

AERMAP is the terrain preprocessor for the AERMOD modeling system and provides data to AERMOD necessary for dispersion calculations in complex terrain. AERMAP reads digital terrain files, interpolates elevations for most model objects, and calculates hill-height scaling factor for receptors in an air dispersion study conducted using AERMOD.

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  • November 23, 2023

U.S. EPA Conference on Air Quality Modeling

Earlier this month, the U.S. EPA hosted the 13th Conference on Air Quality Modeling at their offices in Research Triangle Park, North Carolina. This month’s Modeling Tip takes a closer look at why this Conference is held and what gets accomplished.