United States Atmospheric Sciences
Environmental Protection Research Laboratory
Agency Research Triangle Park NC 27711
Research and Development EPA/600/S8-86/041 Apr. 1987
4xEPA Project Summary
Addendum to the User's Manual
for Single-Source (CRSTER)
Model
Joseph A. Catalano
Addendum to TUPOS —
Incorporation of a Hesitant
Plume Algorithm
The existence of non-Gaussian plume
behavior within the convective boundary
layer has been pointed out and recently
discussed at a national conference. In
such cases the buoyant forces within the
plume, although unable to penetrate the
inversion, both resist downward motion
and result in increased horizontal spread-
ing. Because of its hesitancy for down-
wind dispersion, the author is using
"hesitant plume" to refer to the above
plume behavior. Briggs has suggested
convective scaling parameterizations for
surface crosswind integrated concentra-
tions. Combined with parameterization of
the crosswind spreading and assuming
that the horizontal diffusion is Gaussian,
allows estimation of concentrations on
the horizontal plane. This addendum
makes changes to the TUPOS model in
order to better account for buoyant
plumes that bump against, but do not
penetrate, the inversion layer at the mix-
ing height. The resulting algorithm is
TUPOS-2.0.
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Joseph Catalano is with Aerocomp, Inc., Costa Mesa, CA 92626.
D. Bruce Turner is the EPA Project Officer (see below).
The complete report, entitled "Addendum to the User's Manual for Single-Source
(CRSTER) Model," (Order No. PB 87-145 843/AS; Cost: $18.95, subject to
change) will be available only from:
National Technical Information Service
5285 Port Royal Road
Springfield, VA22161
Telephone: 703-487-4650
The EPA Project Officer can be contacted at:
Atmospheric Sciences Research Laboratory
U.S. Environmental Protection Agency
Research Triangle Park, NC 27711
United States
Environmental Protection
Agency
Center for Environmental Research
Information
Cincinnati OH 45268
Official Business
Penalty for Private Use S300
EPA/600/S8-86/041
OC00329 PS
U S ENVIR PROTECTION AGENCY
REGION 5 LIBRARY
230 S DEARBORN STREET
CHICAGO IL 60604
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