OLS : Record


Main Title Modeling Non-Precipitating Cumulus Clouds as Flow-through-Reactor Transformer and Venting Transporter of Mixed Layer Pollutants.
Author Ching, J. K. S.;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab.
Year Published 1987
Report Number EPA/600/D-87/074;
Stock Number PB87-167102
Subjects Air pollution; Atmospheric models; Cumulus clouds; Concentration(Composition); Transport properties; Atmospheric chemistry; Mathematical models; Pollutants
Library   Call Number Additional Info Location Date Modified
NTIS PB87-167102 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 14p
Abstract A simple diagnostic model of cumulus convective clouds is developed and used in a sensitivity study to examine the extent to which the rate of change of mixed and cloud layer pollutant concentration is influenced by vertical transport and chemical transformation processes occurring as a result of cumulus clouds. The aqueous phase chemical transformation process is parameterized and modeled as a flow through batch reactor. The net vertical exchange between the mixed and cloud layers by cumulus cloud elements that protrude above the dry convective mixed layer is modeled as the product of a venting velocity and the difference in pollutant concentration between the mixed and cloud layer. The two layer model yields an analytic expression involving key parameters such as areal extent of cloud cover, dry deposition rates, thickness in mixed and cloud layers, and the initial concentration difference between the mixed and cloud layers. The model solution was programmed using LOTUS 123.
PUB Date Free Form Mar 87
Category Codes 68A; 55A
NTIS Prices PC A02/MF A01
Primary Description 600/09
Document Type NT
Control Number 715626560
Cataloging Source NTIS/MT
Origin NTIS
Type CAT