CALPUFF is an advanced non-steady-state meteorological and air quality
modeling system developed by ASG scientists. It is maintained by the model developers and distributed by TRC.
The model has been adopted by the U.S.
Environmental Protection Agency (U.S. EPA) in its Guideline on Air Quality
Models as the preferred model for assessing long range transport of
pollutants and their impacts on Federal Class I areas and on a case-by-case
basis for certain near-field applications involving complex meteorological
conditions. The modeling system
consists of three main components and a set of preprocessing and postprocessing
programs. The main components of
the modeling system are CALMET (a diagnostic 3-dimensional meteorological
model), CALPUFF (an air quality dispersion model), and CALPOST (a
postprocessing package). Each of these programs has a graphical user interface
(GUI). In addition to these components, there are numerous other processors
that may be used to prepare geophysical (land use and terrain) data in many
standard formats, meteorological data (surface, upper air, precipitation, and
buoy data), and interfaces to other models such as the Penn State/NCAR
Mesoscale Model (MM5), the National Centers for Environmental Prediction (NCEP)
Eta model and the RAMS meteorological model.
June 29, 2007.
The EPA has approved an update in CALPUFF from V5.711a (dated July 16, 2004) to V5.8
(dated June 23, 2007). This update includes code changes described in Model Change
Bulletin B (MCB-B), MCB-C and MCB-D. CALMET has been updated from V5.53a
(dated July 16, 2004) to V5.8 (dated June 23, 2007). The new codes are based on the
VISTAS-series codes (CALPUFF V5.756 and CALMET V5.726) with the main changes being the
addition of a regulatory switch in CALMET and switch settings recommended by the EPA
to configure the models to be consistent with the prior regulatory versions. The
model preprocessors and postprocessors in the EPA-approved section have been updated
to the VISTAS-series of the model codes.
August 4, 2006.
Update of VISTAS Version 5 (CALMET, CALPUFF, CALPOST, POSTUTIL, CALMET GUI, and CALPro GUI).
CALMET v5.726 (dated August 1, 2006) includes corrections in the overwater buoyancy
flux calculations, and modifications to correct run-time stoppages seen in specific
configurations.
CALPUFF v5.756 (dated July 25, 2006) includes a correction to a potential temperature
gradient calculation near the top of the domain, and modifications
to turn off debug output for slugs and to allow ozone dataset v2.1 files to be
used with the UTM map projection.
CALMET, CALPUFF, CALPOST, and POSTUTIL executables recompiled with new large parameter
configurations consistent with VISTAS applications.
VISTAS Example Screening BART Simulation and Sample Emissions Data Spreadsheets updated.
June 15, 2006. The EPA has approved an update to CALPUFF from
v5.7 (dated April 2, 2003) to v5.711a (dated July 16, 2004) as described in Model Change Bulletin A (MCB-A).
April 14, 2006. Update of Version 6 (CALMET, CALPUFF, CALPOST, POSTUTIL, and CALPro GUI);
Update of VISTAS Version 5 (CALMET, CALPUFF, POSTUTIL, BUOY, and CALPro GUI); VISTAS Sub-Regional Sample
Files and Data Files available and new description of one-step ALM procedure.
April 3, 2006. Release of Version 6 of the CALPUFF modeling
system.
March 30, 2006. Update of CALMM5 to eliminate possible
duplicate hours being retained when using multiple MM5
output files from different MM5 runs with overlapping hours.
January 9, 2006. Model Change Bulletin B (MCB-B) has been added that addresses changes
to the modeling system codes needed to update the current BETA-Test (MCB-A) release. These
changes are posted here to provide users access to important updates prior to the next release of the system.
Model Change Bulletin B(051216)
identifies the changes in CALMET and CALPUFF and may be used to update the corresponding codes. Users who
are currently running the BETA-Test (MCB-A) versions of these programs may download updated versions
by going to the "Download" page. Note that a revised GUI installation for the BETA-Test (MCB-B) system
is provided there as well, which contains the updated CALMET and CALPUFF executables.
May 25, 2005. A version of CALMM5 (MM5 V3) has been added to the Download BETA-Test page.
This version of CALMM5 processes MM5 Version 3 output data directly.
July 16, 2004. A Model Change Bulletin (MCB) has been added that addresses changes
to the modeling system codes needed to update the current BETA-Test release. These
changes will be part of the next release of the system, but are posted here to provide
users access to important updates in the interim. Model Change Bulletin A(040716)
identifies the changes in CALMET,CALPUFF, READ62,and SMERGE,
and may be used to update the corresponding codes. Users who
are currently running the BETA-Test versions of these programs may download updated versions
by going to the "Download" page. Note that a revised GUI installation for the BETA-Test system
is provided there as well, which contains the updated CALMET and CALPUFF executables.
July 11, 2003. Changes to the official version of the CALPUFF modeling
system are available for beta testing on the "Download" page. These modifications are not
yet officially accepted by the US EPA, but they are provided for user testing.
April 17, 2003. A new version of the CALPUFF modeling system
has been released. This version of
the model is the EPA-recommended version that should be used for regulatory
application studies. It includes
numerous upgrades and new features, including a “no-observations” option in
CALMET allowing the model to be run with 3-D prognostic (e.g., MM5)
meteorological data alone, introduction of the PRIME building downwash model, a
generalized coordinate transformations, new self-documenting control (input)
files for the preprocessors and postprocessors, and a set of new GUIs for
running the preprocessing programs.
The elements of the beta-test version that has previously been available
are implemented into the new release.
More information on the specific model updates are provided in the
download area of the web page.
The Frequently Asked Questions (FAQ) pages, formerly available in the
beta-test area, has been expanded and is now accessible on the main download
pages, or by means of the FAQs link listed in the panel on your left.
