Record Display for the EPA National Library Catalog


Main Title Urban Scale Variations of Turbulence Parameters and Fluxes.
Author Ching, J. K. S. ; Godowitch, J. M. ; Clarke, J. F. ; Auer, A. H. ;
CORP Author Environmental Sciences Research Lab., Research Triangle Park, NC. ;Wyoming Univ., Laramie. Dept. of Atmospheric Science.
Year Published 1984
Report Number EPA-600/D-84-166;
Stock Number PB84-209113
Additional Subjects Air pollution ; Atmospheric motion ; Urban areas ; Turbulence ; Missouri ; Air quality ; Convection(Atmospheric) ; Urban heat islands ; Saint Louis(Missouri) ; Atmospheric dispersion ; Atmospheric boundary layer
Library Call Number Additional Info Location Last
NTIS  PB84-209113 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 51p
Sensible, (H), and latent, (LE), heat fluxes and turbulence statistics in St. Louis, Missouri and the surrounding region are presented. The urban-scale analyses were derived from a series of aircraft transects at 150 m above ground across the metropolitan area during the afternoon convective period. The results revealed that H varied by a factor of two to four in the region; the largest values were associated with the urban heat island. LE varied by a factor of four, but low values of LE overlayed the urban heat island. Consequently, the Bowen Ratio, (H/LE), varied from 1.5 over the city to values less than 0.2 in nonurban areas. The areas along the Mississippi River and adjacent lowlying marshland northeast of the downtown area displayed smallest values of H and Bowen Ratio. The derived surface heat storage term (G) for this area as well as for the urban area exceeded either H or LE. The boundary layer over the river area is thus in a state of nonequilibrium.