Record Display for the EPA National Library Catalog


Main Title Dynamically Induced Meso-Scale Variations of the Urban Mixing Layer Depth.
Author Spangle, Timothy C. ;
CORP Author Wyoming Univ., Laramie. Dept. of Atmospheric Resources.
Year Published 1972
Report Number AR/04; EPA-R-800875;
Stock Number PB-228 390
Additional Subjects Climatology ; Urban areas ; Meteorological data ; Climatic changes ; Weather modification ; Atmospheric circulation ; Atmospheric temperature ; Precipitation(Meteorology) ; Temperature inversions ; Synoptic meteorology ; Missouri ; St Louis(Missouri) ; Urban heat islands
Library Call Number Additional Info Location Last
NTIS  PB-228 390 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 36p
The dynamical effects of an urban surface on the airflow above it could be an important factor in meso-scale precipitation patterns. In order to evaluate the dynamical influences of an urban area, local variations in the mixing layer depth over metropolitan St. Louis are investigated. Variations in the height of a temperature inversion capping a deep mixing layer are used to measure the urban effect on the mixing layer depth. Case studies employing aircraft, pilot balloon and radiosonde data collected in Project METROMEX show that the St. Louis urban area produces a doming of the inversion layer over the city during the morning hours on certain summer days. It is concluded from observational and numerical modeling studies that the urban surface influence did not contribute significantly to the formation of the inversion dome but rather that a major influence existed within the upper regions of the mixing river. (Author)