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OLS Field Name OLS Field Data
Main Title Characterizing the Dispersive State of Convective Boundary Layers for Applied Dispersion Modeling.
Author Irwin, J. S. ; Paumier, J. O. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. ;Computer Sciences Corp., Research Triangle Park, NC.
Publisher c1990
Year Published 1990
Report Number EPA/600/J-90/362;
Stock Number PB91-163766
Additional Subjects Boundary layer ; Convection ; Atmospheric diffusion ; Wind velocity ; Atmospheric circulation ; Atmospheric motion ; Turbulence ; Heat flux ; Mathematical models ; Turbulent diffusion ; Wind profiles ; Colorado ; Illinois ; Indiana ; Minnesota ; Field tests ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB91-163766 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/13/1991
Collation 30p
Abstract Estimates from semiempirical models that characterize surface heat flux, mixing depth, and profiles of temperature, wind, and turbulence are compared with observations from atmospheric field studies conducted in Colorado, Illinois, Indiana, and Minnestoa. In addition, for wind and turbulence profiles, sodar observations are compared with tower measurements at the Colorado site. The median surface heat flux, as calculated using surface-layer flux-profile relationships and an energy budget model, was consistently overestimated from 20% to 80%. Wind profiles were derived using surface-layer flux-profile relationships, a wind-profile power-law based on Pasquill stability category, and sodar measurements. The sodar measurements were superior to both types of model estimates. Turbulence profiles were derived from sodar measurements and from semiempirical similarity relationships based on mixing depth and Obukhov length. The scatter in the comparisons with the sodar observations is twice that seen in the comparisons with empirical profile relationships. Overall, it appears that uncertainty of as low as 20% to 30% in the characterization of the diffusion meteorology is the exception rather than the rule.
Supplementary Notes Pub. in Boundary-Layer Meteorology, v53 p267-296 1990. Prepared in cooperation with Computer Sciences Corp., Research Triangle Park, NC.
NTIS Title Notes Journal article.
Title Annotations Reprint: Characterizing the Dispersive State of Convective Boundary Layers for Applied Dispersion Modeling.
Category Codes 55B
NTIS Prices PC A03/MF A01
Primary Description 600/09
Document Type NT
Cataloging Source NTIS/MT
Control Number 113027581
Origin NTIS
Type CAT