Record Display for the EPA National Library Catalog


Main Title Urban Induced Influence on Convective Cloud Activity.
Author Lawso, R. Paul ;
CORP Author Wyoming Univ., Laramie. Dept. of Atmospheric Resources.
Year Published 1973
Report Number AR107; EPA-R-800875;
Stock Number PB-226 961
Additional Subjects Clouds(Meteorology) ; Convection ; Urban areas ; Missouri ; Climatic changes ; Weather modification ; Precipitation(Meteorology) ; Atmospheric Temperature ; Turbulence ; Aerosols ; METROMEX project ; Urban heat islands ; St Louis(Missouri)
Library Call Number Additional Info Location Last
NTIS  PB-226 961 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 60p
Three case study days (9, 13 and 23 August 1971) of Project METROMEX were selected on the merit of available data to investigate possible urban-induced influences on convective cloud activity. Data included observations from meteorologically equipped aircraft and mobile units, radiosondes and pilot balloons, lidar, surface temperature and dew point recording network, radar and 35-mm photographs. Analysis of the data revealed regions where convective cloud activity was inhibited by the presence of an elevated thermally stable layer, while simultaneously, other regions showed cumulus development. Using a dimensional similitude analysis of a fluidal model, it was found that the atmospheric system may be capable of exhibiting elevated warming via turbulent entrainment of warm air downward through the elevated stable layer. Aerosol heating was also considered as a mechanism which may produce elevated heating. (Modified author abstract)