Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title ENAMAP-1A long-term SO2 and sulfate air pollution model : refinements of transformation and deposition mechanisms /
Author Mayerhofer, P. M. ; Endlich, R. M. ; Cantrell, B. E. ; Brodzinsky, R. ; Bhumralkar, C. M. ;
Other Authors
Author Title of a Work
Mayerhofer, P. M.
CORP Author SRI International, Menlo Park, CA.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Publisher U.S. Environmental Protection Agency, Environmental Sciences Research Laboratory,
Year Published 1982
Report Number EPA-600/3-82-063; EPA-68-02-3424; SRI-2003
Stock Number PB82-237017
OCLC Number 703639161
Subjects Sulfur dioxide. ; Sulfates. ; Air--Pollution--United States--Measurement. ; Air quality management--United States--Data processing.
Additional Subjects Air pollution ; Mathematical models ; Sulfur dioxide ; Sulfates ; Transport properties ; Concentration(Composition) ; Information systems ; Depositions ; Tables(Data) ; Graphs(Charts) ; ENAMAP-1A model ; Air quality
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EKBD  EPA-600/3-82-063 Research Triangle Park Library/RTP, NC 02/28/2011
NTIS  PB82-237017 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation vii, 88 p. : maps, charts ; 28 cm.
The ENAMAP-1 model for long-range air pollution transport has been modified in several ways to produce a newer version, ENAMAP-1A. The geographic region of the modeled domain has been increased to include southeastern Canada, and the meteorological and emission data for this area have been added to the U.S. data base. The transformation rate for SO2 to SO4(-2) and the deposition rates of SO2 and SO4(-2) have been updated. In ENAMAP-1 these rates are all constants; in ENAMAP-1A they are variable in space and time. The transformation rate has been made dependent on the amount of sunshine (i.e. a function of latitude and season) and is about twice as large as the previous rate. In ENAMAP-1A the dry deposition rate has been made dependent on the type of underlying terrain and vegetation, on thermal stability in the boundary layer, and on time of day. Wet deposition is treated as a function of rainfall rate and cloud type (convective, warm process, or Bergeron process). Boundary exchanges of SO2 and SO4(-2) have been computed for each of 41 states (or provinces) and also for 12 especially sensitive areas of special interest such as parks. The computations show the history of pollution from emission to deposition and are documented in the form of maps and tables. In contrast to ENAMAP-1 computations, ENAMAP-1A computations for January and August 1977 have much larger amounts of SO4(-2) in the form of airborne concentration and deposition, while the amount of SO2 deposition is decreased.
Project officer: Terru L. Clark. Prepared by SRI International. "February 1982." Includes bibliographical references (p. 45) "EPA-600/3-82-063."