Lakes Environmental Newsletter
Lakes Software Monthly Newsletter


Monthly Newsletter - November 2022

Lakes Environmental December Holiday Schedule

Please find below the holiday schedule for Lakes Environmental’s offices:

December 26 Closed
December 27 Closed
December 30 Closed

If you have an urgent matter requiring assistance during the holidays, please e-mail us at and we will respond to your inquiry during regular business hours.

Online AERMOD Course – Jan 17-18, 2023 - Space Filling Quickly!

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Space is filling quickly for our 2-day online AERMOD training course taking place on January 17 and 18, 2023 from 8:30am to 5:00pm (Central Time – Dallas, USA).

Don't be left out! Register today!

Note: Due to the immense popularity of our online courses and small class sizes, we recommend registering and making payment as soon as possible.


AERMOD (January 17-18, 2023)



Online AERMOD Course – Feb 14-15, 2023

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Don't miss our 2-day online AERMOD course taking place on February 14 and 15, 2023 from 8:30am to 5:00pm (Central Time – Dallas, USA). The same great course, now from the convenience of your home or office!

Register today!


AERMOD (February 14-15, 2023)




2023 Course Schedule

Jan 17-18, 2023
Register →

Feb 14-15, 2023
Register →

Mar 21-22, 2023
Register →

Apr 18-19, 2023
Register →

May 16-17, 2023
Register →

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Reporting Individual Annual Averages from a Multi-Year Run in AERMOD

For a very long time, using AERMOD to calculate the maximum annual average over a multi-year period required multiple model runs with each year being processed separately. That changed with a U.S. EPA update which allowed the model to produce individual year annual average results via the Post-Processing Output File (POSTFILE).

It is important to note that the main AERMOD output file (*.ADO with AERMOD View) still contains the multi-year annual average results. Lakes Software has made it easy to locate the separate averages in AERMOD View, though.

To enable the option to see individual year annual averages in AERMOD View, follow the steps below:

Step 1. Open the Control Pathway window

Step 2. Select the Pollutant/Averaging options

Step 3. Enable the Annual averaging period

Step 4. Enable the Report Maximum Annual Average for Each Met Year option

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Step 5. Go to the Meteorology Pathway window

Step 6. Add your multi-year surface (*.SFC) and profile (*.PFL) files

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Step 7. Finish setting up your project and run the model

The Report Maximum Annual Average for Each Met Year option automatically generates an annual average Post-Processing file for your model run.

* Maximum Annual Average POST file for Each Met Year POSTFILE ANNUAL ALL PLOT TEST-RUN.AD\ANNUAL_GALL.PLT 31

Upon successful model completion, the file will be displayed in the Plots Tree View under the Max Annual Average for Each Met Year heading. Use the Layer drop-down menu to choose which year you want contoured in the main display.

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Plots Tree View


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Layer Selection for the Post-Processing File

The file can also be opened in the Plot File Grid View to view the data in table format. The same Layer control allows the user to select which year is displayed.

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Scientists Uncover New Clues About the Climate and Health Impact of Atmospheric Particles

November 1, 2022 - Peering inside common atmospheric particles is providing important clues to their climate and health effects, according to a new study by University of British Columbia chemists.

Read more →

Greenland’s Largest Ice Sheet Thinning Rapidly

November 9, 2022 - The loss of ice from Greenland’s largest basin is occurring much faster and could contribute up to six times more to global sea-level rise by 2100 than climate models currently project, according to a study led by Dartmouth professor Mathieu Morlighem with researchers from the Technical University of Denmark (DTU) and the University of California, Irvine.

Read more →

Additional Environmental News

Visit the Environmental News Network (ENN), the most dependable online environmental news source!



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