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RECORD NUMBER: 150 OF 868

OLS Field Name OLS Field Data
Main Title Continued research in mesoscale air pollution simulation modeling. Volume IV, Examination of the feasibility of modeling photochemical aerosol dynamics /
Author Jerskey, T. N. ; Seinfeld., J. H. ;
Other Authors
Author Title of a Work
Jerskey, T. N.
Seinfeld, John H.
Demerjian, Kenneth L.
CORP Author Systems Applications, Inc., San Rafael, Calif.;Environmental Sciences Research Lab., Research Triangle Park, N.C.
Publisher Environmental Sciences Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1976
Report Number EPA 600-4-76-016d; SAI/EF75-26; EPA-68-02-1237
Stock Number PB-257 529
OCLC Number 833149496
Subjects Photochemical smog--Simulation methods. ; Air--Pollution--Simulation methods. ; Environmental monitoring--EPA 600/4-76-016 D.
Additional Subjects Air pollution ; Atmospheric models ; Computerized simulation ; Water ; Particles ; Aerosols ; Concentration(Composition) ; Mathematical models ; Numerical analysis ; Carbon monoxide ; Nitrogen oxides ; Nitrogen ; Sensitivity ; Photochemical reactions ; Physical properties ; Chemical properties ; Urban areas ; Assessments ; Modifications ; Diffusion ; Wind velocity ; Forecasting ; Sulfur ; Coagulation ; Dynamics ; Nucleation ; Condensation ; Coagulation ; Surfaces ; Particles ; Aerosols ; Smog ; Los Angeles(California)
Internet Access
Description Access URL
http://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=9100J9UK.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJBD ARCHIVE EPA 600-4-76-016d Headquarters Library/Washington,DC 04/02/2013
NTIS  PB-257 529 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation viii, 156 leaves : charts ; 28 cm.
Abstract A mathematical model of the dynamics of photochemical aerosols should include emissions of primary particulates and gaseous precursors of secondary aerosols, homogeneous nucleation, heterogeneous condensation, heterogeneous chemical reaction, coagulation, advection, diffusion, settling, and deposition on surfaces. This report discusses the theory of each of these processes and assesses the relative importance of each in shaping the volume distribution of photochemical aerosols. The authors conclude that in Los Angeles photochemical smog heterogeneous condensation is the principal mechanism for changes of the volume distribution in the accumulation size range, though homogeneous nucleation can be important under certain conditions for forming very small particles (less than 100 A diameter). Coagulation must be considered in reshaping the size distribution of emissions and in reducing the number of particles formed by homogeneous nucleation. An in-depth assessment is also presented of the pathways for the formation of aerosol material from the gas phase via homogeneous and heterogeneous chemistry. Finally, the equations governing the evolution of the photochemical aerosol are derived and simplified on the basis of order-of-magnitude calculations of the individual terms, and various equations for different properties of the aerosol are derived and discussed.
Notes Includes bibliographical references (p. 230-232). "May 1976." "Project Officer, Kenneth L. Demerjian." References: p. 147-155.
Place Published Research Triangle Park, N.C.
Availability Notes Also available in set of 4 reports as PB-257 525-SET, PC E99/MF E99.
Corporate Au Added Ent Environmental Sciences Research Laboratory.
Title Ser Add Ent Research reporting series. Environmental monitoring ; EPA 600/4-76-016 D.
Alternate Title Examination of the feasibility of modeling photochemical aerosol dynamics
NTIS Title Notes Final rept. Jun 74-Jun 75.
PUB Date Free Form May 76
Series Title Untraced Research reporting series. 4, Environmental monitoring ; EPA 600/4-76-016 D\ Environmental monitoring ; EPA 600/4-76-016 D
Category Codes 4A; 13B; 7E; 68A; 55E; 99E
NTIS Prices PC A08/MF A01
BIB Level m
Cataloging Source OCLC/T
Control Number 326627547
OCLC Time Stamp 20130328102657
Language eng
Origin OCLC
Type MERGE
OCLC Rec Leader 01714nam 2200373Ka 45020