Section 1: Introduction
To enhance the functional
ity of the modeling system, a PC-based GUI is provided for nearly every
component. The GUIs can be used to prepare the control file that configures a run, execute the
corresponding component model, and conduct file management functions. The GUIs also contain an
extensive help system that makes much of the technical information contained in this manual available to
the user on-line. The modeling system may also be setup and run without the aid of the GUIs. The
control file for each component is simply a text file that is readily edited, and it contains extensive
information about model options, default values, and units for each variable.
In addition to CALMET, CALPUFF, CALPOST, and their corresponding GUIs, the modeling system
interfaces to several other models, which is facilitated by several preprocessors and utilities. Figure 1-1
displays the overall modeling system configuration. Four of the models shown in Figure 1-1 are external
models that are not included in the CALPUFF system, but they can be interfaced with CALPUFF
modules:
MM5/MM4 (Penn State/NCAR Mesoscale Model) is a prognostic wind field model with four
dimensional data assimilation (Anthes et al., 1987; Grell et al., 1996). The interface program
(CALMM5) converts the MM5 data into a form compatible with CALMET.
NAM(formerly Eta) (North American Mesoscale model), and the WRF (Weather Research and
Forecasting) model are NCEP operational weather models. Eta/NAM/WRF model output files
are produced for use by the Advanced Weather Interactive Processing System (AWIPS) in
various AWIPS grids. The interface program CALETA converts the NAM and CALWRF
converts the WRF output data into forms compatible with CALMET.
RUC (Rapid Update Cycle) model is an NCEP operational weather model with high-frequency
(every hour) short-range weather model forecasts (out to 12+ hours). The interface program
CALRUC converts the RUC output data into a form compatible with CALMET.
RAMS (Regional Atmospheric Modeling System, Version 4.3) model is a NOAA Air Resources
Laboratory (ARL) numerical weather model that can be run at global, mesoscale, and local
scales. The interface program CALRAMS converts the RAMS output data into a form
compatible with CALMET.
TAPM (The Air Pollution Model) is a CSIRO (Commonwealth Scientific Industrial Research
Organisation) Lagrangian Part-Puff model, (Hurley 1998, 1999). The interface CALTAPM
converts the TAPM output data into a form compatible with CALMET.
CSUMM (a version of the Colorado State University Mesoscale Model) is a primitive equation
wind field model (Kessler, 1989) which simulates mesoscale airflow resulting from differential
surface heating and terrain effects. Various options for using CSUMM output with CALMET are
provided.
1-8
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