CALPUFF View is a PRE- and POST-Processor for
The CALPUFF modeling system has 3 main
- CALMET (a diagnostic 3-D meteorological
- CALPUFF (the transport and dispersion
- CALPOST (a postprocessing package).
This system is a comprehensive modeling tool that
includes meteorological and geophysical data processors,
a meteorological model, a puff-based dispersion model,
and post-processing modules.
CALPUFF is already
in use to model numerous air quality scenarios,
- Toxic pollutant deposition
- Near-field impacts from
• volume sources
- Forest fire impacts
- Visibility assessments
- Long range transport studies.
- Complete pre- and post-processor interface for
CALPUFF & CALMET
- Up to 100 times easier to use than plain CALPUFF
- Transparently integrates all geophysical data
(terrain, land use, meteorology).
- Automatically downloads maps and terrain data from
- Outstanding post-processors: such as 3D-wind
fields, contour plots, XY graphics, and puff
- See terrain and results in photo-realistic and
animated tools (zoom, rotate, print).
- Reads output files from CALMET, CALPUFF, and
- Point, area, volume, and line sources.
- Non-steady-state emissions and meteorological
- Calm wind algorithm.
- Causality effects.
- Efficient sampling functions.
- Dispersion coefficient options.
- Boundary layer turbulence.
- Vertical wind shear.
- Plume rise.
- Building downwash
- Subgrid scale complex terrain (CTDM)
- Dry Deposition
- Overwater and coastal interaction effects.
- Chemical transformation options
- Wet removal
- Graphical User Interfaces
- Buoyant area source algorithm
- Buoyant line source capability
- Wind shear effects - Puff splitting
- ISC input conversion program
- BPIP interface
- Split sigmas
- Output data compression
- Recent Developments - CALMET
- MM4/MM5 interface
- Use of satellite cloud data
- Similarity theory options
- Map factors
- Interpolation of precipitation data
- Slope flow improvements
- Terrain angle, orientation and shadowing effects.
A preliminary consideration on advantages
of a puff model, such as CALPUFF, over plume models
such as ISCST3 should be based on the following
- Whether the straight-line steady-state assumptions
on which a plume model is based are valid.
- Transport distances.
- Potential for temporally and/or spatially varying
flow fields due to influences of complex terrain.
- Non-uniform land use patterns.
- Coastal effects.
- Calm winds and stagnation conditions.
- Variable wind directions.
For cases involving a high degree of spatial
variability of the flow within the boundary layer, such
as upslope or downslope flows or flows along a winding
river valley, the straightline, steady state assumption
may not be valid beyond even a few kilometers, and a
puff model may be more appropriate.
Puff models have a more
realistic presentation of dispersion than plume
Each of these programs has a graphical user interface
(GUI). In addition to these components, there are
several other processors that may be used to prepare:
- Geophysical (land use and terrain) data in many
- Meteorological data (surface, upper air,
precipitation, and buoy data), and
- Interfaces to other models, like Penn State/NCAR
Mesoscale Model (MM5).
- Complex Terrain
- Stagnation, inversion, recirculation, and
- Overwater transport
- Coastal conditions
- US EPA recommended model for Long Range Transport.
- Near-fields impacts
- Visibility assessments
- Class I area impact studies
- Criteria pollutants modeling
- State Implementation Plan (SIP) applications.
- Secondary pollutant formation and particulate
- area and line sources.