Record Display for the EPA National Library Catalog


Main Title Tracer Study of Vertical Exchange by Cumulus Clouds.
Author Ching, J. K. S. ; Alkezweeny, A. J. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab. ;Battelle Pacific Northwest Labs., Richland, WA.
Year Published 1986
Report Number EPA/600/J-86/438;
Stock Number PB88-159645
Additional Subjects Convection ; Cumulus clouds ; Troposphere ; Air pollution ; Boundary layer ; Aircraft ; Gases ; Wind velocity ; Height ; Tests ; Temperature ; Ozone ; Sulfur hexafluoride ; Rocky Mountains ; Mixing ; Windward drift ; Draft(Air flow) ; Flight path ; Kentucky ; Reprints ; Acid rain ; Tracer studies ; Downdrafts ; Lexington(Kentucky)
Library Call Number Additional Info Location Last
NTIS  PB88-159645 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 13p
The exchange of material by convective cloud processes between the mixed layer and the overlying free troposphere is examined. The paper describes results of a field experiment that was conducted in Lexington, Kentucky during the period from July 20 to August 24, 1983 to study the processes associated with the vertical transport of acidic pollutants by nonprecipitating cumulus convection. To document the vertical transport, an SF6 tracer was released from an aircraft either within or above the mixed layer and sampled by another aircraft at various levels in and above the mixed layer as well as on the ground. The results show that pollutants from the boundary layer are transported into the cloud layer by fields of cumulus and the cloud dynamics also force cloud layer air into the mixed layer.