BREEZE Software and Data / Trinity Consultants

Keeping the Increasing Complexity of Air Dispersion Modeling in Check


Courtesy of Courtesy of BREEZE Software and Data / Trinity Consultants

Driven by advances in scientific knowledge, tightening and constantly changing regulations, and higher-resolution raw data, environmental modeling is demanding more and more from EH&S professionals and their computers. AERMOD run times for large projects are measured in days rather than minutes and terrain data file sizes routinely exceed 100 MB. Modelers can increase productivity and keep the increasing model complexity under control with a number of tools from BREEZE Software.

Reduce ballooning AERMOD run times

To address extreme run times, BREEZE Software developed BREEZE AERMOD Parallel, which takes advantage of the multi-core processors found in most modern computers to dramatically decrease run times.  A two-core version nearly doubles the speed of an AERMOD run and is included with BREEZE AERMOD.  For those who need more speed, check out the BREEZE Remote Modeling System (BRMS) for results up to 100x faster!  Both produce identical results to the U.S. EPA AERMOD executable.

Staying on top of changes to meteorological data processing standards

Modeling options and regulatory guidelines applicable to meteorological data processing change on a regular basis.  The BREEZE Software data team consists of staff meteorologists, environmental engineers, and modeling experts, who can process meteorological data quickly and properly for ANY location in the world!  Because we stay up to date with U.S. regulatory requirements, as well as innovative techniques for generating accurate AERMOD-ready data for remote locations, our data can be used with confidence for regulatory modeling.

Recent regulatory model updates with more coming this Fall

  • AERMOD: An updated release of EPA’s AERMOD and the AERMET meteorological preprocessor is expected before the end of the year. Some of the most exciting potential developments for modelers are the expected changes to the handling of low wind speeds for low level releases, a situation in which AERMOD has been shown to over predict concentrations.
  • CALPUFF:  The CALPUFF model is undergoing continuous development.  From the modeler’s perspective, this is complicated by the existence of two versions of the CALPUFF system: the most recent release from the model’s developer and the most recent version that has been fully tested and approved by U.S. EPA for regulatory use.  Both versions will be included in BREEZE’s upcoming CALPUFF Professional 2.1 release.

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