Modeling Software for EHS Professionals

Programs and Processors

BREEZE CALPUFF supports the basic U.S. EPA-approved programs. The BREEZE CALPUFF user interface provides modelers with more functionality and tools for analyzing results. The main components supported by BREEZE CALPUFF graphical user-interface are:

  • CALMET – 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)

BREEZE CALPUFF also supports the following pre- and post-processors:

  • 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