Record Display for the EPA National Library Catalog


Main Title An Evaluation of a solar radiation/delta-T Method for estimating Pasquill-Gifford (P-G) stability categories.
Author Coulter, C. Thomas.
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Office of Air Quality Planning and Standards.
Publisher U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Technical Support Division,
Year Published 1993
Report Number EPA/454-R-93-055
Stock Number PB94-113958
OCLC Number 30539971
Subjects Solar radiation ; Air--Pollution--Standards--United States ; Solar radiation simulation
Additional Subjects Air pollution ; Solar radiation ; Stability ; Atmospheric models ; Dispersion ; Atmospheric temperature ; Meteorological data ; Wind velocity ; Atmospheric turbulence ; Mixing ; Atmospheric dispersion modeling ; Atmospheric stability estimation ; Meteorological preprocessors ; Dispersing ; Pasquill-Gifford stability categories
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EKBD  EPA-454/R-93-055 Research Triangle Park Library/RTP, NC 06/10/1994
ELBD ARCHIVE EPA 454-R-93-055 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ESAD  EPA 454-R-93-055 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB94-113958 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 1 volume (various pagings) : illustrations ; 28 cm
The publication documents the effort made to develop and evaluate a new methodology for estimating stability category using on-site meteorological data that can be automatically collected and logged, e.g., wind speed and solar radiation during daytime and temperature difference (Delta-T) at night. The new method (Solar Radiation/Delta-T, SRDT) uses 5 wind speed classes and 4 insolation classes during daytime, and 3 wind speed classes and 2 Delta-T classes during nighttime. To fulfill the objectives of the evaluation three on-site meteorological data bases were obtained: Kincaid, IL (4/80 - 8/80), Longview, WA (1/91 - 12/91), and Bloomington, IN (7/91 - 7/92). The data were pooled to yield 19,540 valid hours. Using the composite data, stability classification criteria were determined iteratively for the SRDT method. Stability categories via both methods were rigorously compared for all valid hours. Overall, stability categories coincided for 62% of the hours examined, and were + or - 1 class for 89% of the hours. The same criteria were then applied to each of the three sites individually to assess site to site variability. This variability was seen to be of the order of that seen within an individual site.
Author: C. Thomas Coulter. "October 1993." "EPA/454-R-93-055." Includes bibliographical references (pages 28-29).