Lakes Environmental Newsletter
Lakes Software Monthly Newsletter


Monthly Newsletter - April 2023

Update to Ontario’s Air Dispersion Models

On April 13th, Ontario’s Ministry of the Environment, Conservation and Parks (MECP) adopted version 22112 of the U.S. EPA AERMOD air dispersion model & AERMET meteorological pre-processor as the approved dispersion model versions under Ontario Regulation 419/05 Air Pollution - Local Air Quality Regulation (O. Reg. 419/05).

A bulletin announcing the change was published in the Environmental Registry of Ontario.

The 22112 updated AERMOD/AERMET model versions are based on the best available science and will provide a better indication if an industrial facility meets Ontario’s strict environmental standards.

If you are located in Ontario and have an outdated version of AERMOD View, we’ve just announced special time-limited pricing to upgrade your license and start using the latest U.S. EPA model release 22112. Contact us today for further details!

Environmental Justice Webinar – May 3, 2023

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On Wednesday, May 3rd, at 2:00pm Eastern (New York Time) our team of experts will discuss the most advanced approach to quickly and inexpensively conduct complex Environmental Justice (EJ) studies.

Discover proven technical approaches including:

  1. Effectively mapping the highest impacted communities based on cumulative risk.
  2. Tracing back the contributing sources based on risk.
  3. Prioritizing emissions reduction efforts to address the highest risks first.

Register for this FREE 30-minute webinar using the link below.

MAY 3 | 2:00 PM ET

For more information on our upcoming webinars and to view our past webinar recordings, please visit our website.

Online AERMOD Training Course – Jun 20-21, 2023

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Space is filling quickly for our 2-day online AERMOD training taking place on June 20 and 21, 2023 from 8:30am to 5:00pm (Central Time – Chicago, USA).

Register now before spots are gone!

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 (Jun 20-21, 2023)



A&WMA Annual Conference and Exhibition

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We will be in Orlando from June 5-8, 2023, for the Annual Air & Waste Management Conference and Exhibition.

Lakes Environmental is proud to be both a gold sponsor of the conference and an exhibitor! Drop by booth #303 to meet our friendly, knowledgeable staff and for your chance to win a FREE copy of our AERMOD View air dispersion modeling software!

Visit the conference website to register for this annual event.

Lakes Environmental Teaching Professional Development Courses at 2023 A&WMA Conference

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The Air & Waste Management Association will be offering a variety of high-quality professional development courses on June 5, 2023, just prior to the annual conference in Orlando.

As in previous years, we will present a one-day course on AERMOD Air Dispersion Modeling and a one-day course on Puff Dispersion Modeling. Additional details regarding these courses can be found below.


AIR-299: AERMOD Air Dispersion Modeling (Jun 5, 2023)


AIR-262: Puff Dispersion Modeling with CALPUFF/SCICHEM (Jun 5, 2023)


Orlando, FL


Lakes Environmental Closed for Victoria Day Holiday

Lakes Environmental's offices will be closed on Monday, May 22, 2023, to observe the Victoria Day holiday. Our Dallas support office will remain open on this day. If you have any support questions during that time, please e-mail and our team will respond to your inquiry as soon as possible.


2023 Course Schedule

Jun 20-21, 2023
Register →

Jul 25-26, 2023
Register →

Aug 22-23, 2023
Register →


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Comparing Wind Roses Using WRPLOT View

Wind roses are used to graphically depict wind frequency. Directly comparing wind roses from two different sets of meteorological data is a great way to compare how similar the data is. This is commonly done when comparing observational data to that generated with a meteorological model such as WRF or MM5.

Lakes Software’s WRPLOT View freeware application has long been a favorite tool of scientists in many different fields looking to analyze wind data. When using WRPLOT View to compare wind roses from different data sets, it is important to understand what is being depicted so an accurate assessment of the data can be made.

When a met data file is loaded into WRPLOT View, the wind rose that is generated is displayed on a scale that shows the percentage of time that the wind blows in each direction. By default, this scale is automatically determined to best fit the data.

When two different wind roses are created, they may have different scales assigned to them by default. In the images below, notice that the first site has a maximum frequency just under 6% while the second site is near 7.35% for its maximum frequency.

Modeling Tip pictureModeling Tip picture

To make an accurate comparison, it is helpful to set the scales to be identical. To change the scale of a wind rose in WRPLOT View, do the following:

  1. Click the Options button on the Wind Rose tab.

    Modeling Tip picture

  2. Select Percentage under the Scaling option.

    Modeling Tip picture

  3. Specify the desired scale.

    Modeling Tip picture

Once the scales are the same for both wind roses, a visual comparison is much easier to perform.

Modeling Tip pictureModeling Tip picture



US Forests Face an Unclear Future With Climate Change

April 6, 2023 - When you walk through a forest, you are surrounded by carbon. Every branch and every leaf, every inch of trunk and every tendril of unseen root contains carbon pulled from the atmosphere through photosynthesis.

Read more →

Ice Sheets Can Collapse Faster Than Previously Thought

April 5, 2023 - An international team of researchers, led by Dr Christine Batchelor of Newcastle University, UK, used high-resolution imagery of the seafloor to reveal just how quickly a former ice sheet that extended from Norway retreated at the end of the last Ice Age, about 20,000 years ago.

Read more →

Additional Environmental News

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



2023 Conference Schedule

2023 National Tribal Forum on Air Quality (NTFAQ)
May 1-4, 2023 | Chandler, AZ

Learn more →

TCEQ Environmental Trade Fair and Conference (ETFC)
May 16-17, 2023 | Austin, TX | Booth # 401

Learn more →

Air & Waste Management Association’s 116th Annual Conference & Exhibition
Jun 5-8, 2023 | Orlando, FL | Booth # 303

Learn more →


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