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Main Title Impact of topographic circulations on the transport and dispersion of air pollutants /
Author McNider, Richard T. ; Pielke, Roger A.
Other Authors
Author Title of a Work
Pielke, Roger A.
CORP Author Virginia Univ., Charlottesville. Dept. of Environmental Sciences.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Publisher U.S. Environmental Protection Agency, Environmental Sciences Research Laboratory,
Year Published 1981
Report Number EPA 600/4-81-068; EPA-R-806207
Stock Number PB82-102435
OCLC Number 745900632
Subjects Air--Pollution--Mathematical models ; Atmospheric circulation--Mathematical models
Additional Subjects Air pollution ; Mathematical models ; Topography ; Transport properties ; Diffusion ;
Library Call Number Additional Info Location Last
EKBD  EPA-600/4-81-068 Research Triangle Park Library/RTP, NC 08/15/2011
NTIS  PB82-102435 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 211 p. : ill. ; 28 cm.
Abstract A numerical mesoscale model is utilized to examine slope flows and the classic mountain-plain circulation for idealized topography. Special emphasis is given to turbulent parameterization in the stable boundary layer and the unique characteristics of turbulent mixing in the slope flows. The numerical simulations for idealized valley-plain configurations produced results consistent with observations such as shallow sidewall flows, the pooling of cool air in the valley, and a deep mountain flow out of the valley. A Lagrangian particle model, operating in the terrain following coordinate system of the mesoscale model, was developed to examine pollutant transport in the modeled circulations while a Markov statistical process was used to evaluate turbulent dispersion. Higher order turbulence parameters needed for the statistical model were directly computed from the numerical model. Results of dispersion tests in the modeled slope flows showed enhanced vertical dispersion in the slope flows compared to flow over a flat boundary, and, importantly, that normal surface scaling parameters for pollutant dispersion such as friction velocity were inappropriate for the slope flows.
Notes Project Officer: George C. Holzworth. Grant No. "August 1981." Includes bibliographical references. "EPA-600/4-81-068."
Place Published Research Triangle Park, NC
Corporate Au Added Ent United States. Environmental Protection Agency. Environmental Sciences Research Laboratory.; United States. Environmental Protection Agency.
NTIS Title Notes Final rept. Oct 78-Apr 81.
PUB Date Free Form Aug 81
Category Codes 13B; 68A
NTIS Prices PC A10/MF A01
Primary Description 600/09
BIB Level m
Cataloging Source OCLC/T
Control Number 323804558
OCLC Time Stamp 20110808101636
Language eng
Origin OCLC
OCLC Rec Leader 01209nam 2200313Ka 45020