AERMOD Modeling System - A steady-state plume model that incorporates air
dispersion based on planetary boundary layer turbulence structure and scaling
concepts, including treatment of both surface and elevated sources, and both simple
and complex terrain.
CALPUFF Modeling System - A non-steady-state puff dispersion model that
simulates the effects of time- and space-varying meteorological conditions on
pollution transport, transformation, and removal. CALPUFF can be applied for longrange
transport and for complex terrain.