Lakes Environmental Newsletter
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Monthly Newsletter - September 2019 Edition

US EPA Announces Updates to the AERMOD Modeling System

On August 21, 2019, the US EPA announced revisions to the AERMOD air dispersion model and its components AERMET, the meteorological data preprocessor, and BPIP-PRIME, the building downwash program. The updated model executables have been published on the SCRAM website.

A full list of changes for each model can be found on the AERMOD, AERMET, and BPIP-PRIME web pages. Changes include:

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  • New source types: RLINE (BETA) and RLINEXT (ALPHA) for modeling roadway emissions.
  • A set of new ALPHA keywords for modifying building downwash calculations.
  • Transition of Method 2 particle deposition and gaseous deposition to ALPHA state.
  • Miscellaneous bug fixes, compilation adjustments, runstream controls, and documentation.

Lakes Environmental's team is hard at work implementing updates to AERMOD View, AERMET View, and the AERMOD parallel version (AERMOD MPI) to address the changes incorporated into Model Versions 19191. Be on the lookout for an email from Lakes Environmental announcing the new AERMOD View release upon its availability.

If your copy of AERMOD View is no longer in maintenance, please contact our sales team at for pricing to update your software.

AERMOD 19191 Webinar

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On Thursday, September 5th, we held a FREE 30-minute webinar regarding the recent changes to the US EPA AERMOD and related models (version 19191).

If you were unable to join us, you can still watch this information session using the links located below.

  Presentation   Live Demo

AERMOD & CALPUFF Courses in Los Angeles, CA – Nov 4-7, 2019

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We will host four days of AERMOD and CALPUFF training in Los Angeles from November 4-7, 2019.

Both courses will include a WRF case study for each student’s desired location, and the CALPUFF portion of this course will also include a special Class I Area Visibility case study.


AERMOD (Nov 4-5, 2019)

CALPUFF (Nov 6-7, 2019)


10% Discount:

Ends Sep 20, 2019



Los Angeles, CA



AERMOD-CALPUFF Course in Hyderabad, India – Dec 2-5, 2019

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Together with our distributor, LaGa Systems, we will hold a four day AERMOD-CALPUFF course in Hyderabad, India from December 2-5, 2019.

This course will include a do-it-yourself WRF case study for each student’s desired location.


AERMOD-CALPUFF (Dec 2-5, 2019)


10% Discount:

Ends Oct 1, 2019



Hyderabad, India



Lakes Environmental 2020 Training Course Announcement

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We’re pleased to announce our 2020 Global AERMOD and CALPUFF Air Dispersion Modeling Training Course Schedule!

Course dates and locations for the first half of the year are listed below and can also be found by visiting our website. Join us for world class training with our team of senior air quality experts!

Feb 24-27

Dallas, Texas


Mar 5-6

Toronto, Ontario


Mar 16-19



Apr 20-23

Las Vegas, Nevada

Online registration will open soon! Start making plans now to attend one of these courses. Early registration discounts will be available for a limited time only!

Lakes Environmental Closed for Canadian Thanksgiving Holiday

Lakes Environmental's Waterloo office will be closed on Monday, October 14, 2019 to observe the Canadian Thanksgiving holiday. Our Dallas support office will remain open on this day. If you have any needs during that time, please e-mail us at and we will respond to your email as soon as possible.

New Solution from the Lakes Software Family

Sign up today and get the entire secure 3 in 1 solution for free!

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2019/2020 Course Schedule

November 4-7, 2019 | Los Angeles, CA
Register →

December 2-5, 2019 | Hyderabad, India
Register →

February 24-27, 2020 | Dallas, TX
Registration Coming Soon

March 5-6, 2020 | Toronto, ON
Registration Coming Soon

March 16-19, 2020 | Singapore
Registration Coming Soon

April 20-23, 2020 | Las Vegas, NV
Registration Coming Soon

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Plant Blanking Boundary Layer

When viewing results from an air dispersion model run, the primary concern of many modelers are conditions measured at receptors located in areas generally accessible by the public. This may preclude modeling from occurring within well-defined property boundaries that restrict public access to a facility.

Lakes Environmental’s AERMOD View and CALPUFF View contain the Plant Boundary tool for defining a set of discrete receptors as the property boundary. Using this tool automatically adds a new layer to the project’s Overlays – the Plant Blanking Boundary layer.

Modeling Tip
Plant Boundary Tool

This layer fills in the bounds of the Plant Boundary with an opaque polygon that effectively hides all layers listed beneath it.

As shown in previous Modeling Tips, it is easy to remove onsite receptors that fall within the property boundary. Removing these receptors but leaving concentration contours can give the impression of calculated model results where they do not exist.

The images below display the impact of the Plant Blanking Boundary. The first image is the default image of a Plant Boundary featuring the Blanking layer enabled. The second image shows contours when the Blanking layer is disabled.

Modeling Tip
Blanking Layer Enabled

Modeling Tip>
Blanking Layer Disabled

The Blanking layer is available for display via the Plant Blanking Boundary layer displayed in the Overlays Tree View.

Modeling Tip



Putting a Price on Carbon Pollution Alone Unlikely to Help Reach Climate Goals

September 5, 2019- The Paris Agreement, signed in 2015, requires nations to collectively limit global warming to 2°C by 2100, and to pursue efforts to limit the temperature increase even further to 1.5°C.

Read more →

Researcher Examines UN Climate Change Education

September 9, 2019 - According to the United Nations, education and training is a crucial part of tackling climate change.

Read more →

Additional Environmental News

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



2019 Conference Schedule

Refinery And Chemical Industry Emissions Symposium
November 6-8, 2019 | Davis, CA USA

Learn more →

2019 Chemical and Biological Defense Science & Technology (CBD S&TConference)
November 18-21, 2019 | Cincinnati, OH USA

Learn more →


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This newsletter contains information gleaned from various sources on the web, with complete links
to the sources cited. Organizations cited are in no way affiliated with Lakes Environmental Software.

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