Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Detection of Centripetal Heat-Island Circulations from Tower Data in St. Louis.
Author Shreffler, Jack H. ;
CORP Author Environmental Sciences Research Lab., Research Triangle Park, NC. Meteorology and Assessment Div.
Year Published 1978
Report Number EPA/600/J-78/124;
Stock Number PB-298 522
Additional Subjects Atmospheric circulation ; Urban areas ; Wind velocity ; Diurnal variations ; Convection ; Missouri ; Regional Air Monitoring System ; Heat islands ; Centripetal acceleration ; Saint Louis(Missouri) ; Reprints
Library Call Number Additional Info Location Last
NTIS  PB-298 522 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 16p
Hourly averaged meteorological data gathered by a 25-tower network about St. Louis during 1976 are used in a search for centripetal circulations generated by the urban heat island. Considering data collected when the network resultant speed was less than 1.5 m/s, two data classes of several hundred hours each are formed. One class is associated with weak heat islands, daytime hours, and convective instability, while the other class is associated with strong heat islands, nighttime hours, and extreme rural stability. Mean centripetal flows are clearly discernable from data of both classes, but the convergence is stronger for the flows associated with the weaker heat islands. This unexpected result is explained in terms of the ease with which sustained vertical motions can be generated over the city by the available forcing under different stability regimes. The detectability of the heat island influence diminishes very rapidly with increasing speed of the large-scale flow.