BREEZE CALPUFF enhances the basic U.S. EPA-approved programs providing modelers with more functionality and tools for analyzing results. The main components of the BREEZE CALPUFF modeling system are:

  • CALMET - includes a diagnostic 3-dimensional meteorological model (considering slop flows, kinematic terrain effects, terrain blocking effects, and a divergence minimization procedure) and a micro-meteorological model for overland and overwater boundary layers
  • CALPUFF - a non-steady-state Lagrangian Gaussian puff model (considering complex terrain effects, overwater transport, coastal interaction effects, building downwash, wet and dry removal, and simple chemical transformation)
  • CALPOST - a post-processing package (Computation of time-averaged concentrations, deposition fluxes, and visibility impacts)

Pre- and post-processors of BREEZE CALPUFF include: 

  • READ62 - a meteorological preprocessor for extracting and processing upper air wind and temperature data
  • SMERGE - a meteorological preprocessor for processing hourly surface observations
  • PMERGE - a meteorological preprocessor for reformatting the precipitation data
  • MAKEGEO - a preprocessor reading land use, terrain data, user inputs and surface parameters and producing a file ready for CALMET
  • CALSUM - a postprocessor summing and scaling concentrations or wet/dry fluxes
  • APPEND - a postprocessor appending two or more sequential CALPUFF concentration, wet/dry flux, or relative humidity (visibility) files in time
  • POSTUTIL - a postprocessor merging species, summing and scaling results from different runs, adding background, and repartitioning nitric acid/nitrate  

CALPUFF GUI Screenshot


CALMET GUI Screenshot

Request a Demo

Related Products & Services

  • Model-ready meteorological data for the CALPUFF and CALMET models

  • Model air quality impacts due to industry emissions for permitting and planning purposes

  • Air dispersion modeling suite that predicts air quality impacts from moving and idling motor vehicles

  • Analyze and visualize model results plus meteorological and terrain data

  • Custom EHS, modeling, and programming solutions

Upcoming Training