The Plume Dynamics Model (PDM) is the plume in grid (PinG) preprocessor for PinG instrumented versions of the CCTM. Using input emissions files that identify the elevated point sources within the modeling domain to treat with PinG, the PDM simulates plume rise, plume transport, and plume dispersion for each of the selected point sources. The PDM also specifies when a particular plume cross section is to be transferred to the parent grid.

All PDM configuration happens during execution of the program. A series of environment variables for specifying different configurations of the PDM are located in the run script. By default these variables are commented out. To override the default setting of a configuration option, uncomment the corresponding variable and change the setting for your application.