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RECORD NUMBER: 36 OF 51

OLS Field Name OLS Field Data
Main Title Nonlinearities in the Sulfate Secondary Fine Particulate Response to NOx Emissions Reductions as Modeled by the Regional Acid Deposition Model.
Author Dennis, R. L. ; Tonnesen, G. S. ; Mathur, R. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. National Exposure Research Lab.
Publisher 2001
Year Published 2001
Report Number EPA/600/A-01/019;
Stock Number PB2001-104131
Additional Subjects Acid rain ; Atmospheric models ; Nitrogen oxides ; Ozone ; Particulates ; Air pollution ; Sulfates ; Air quality maintenance planning areas ; Stationary sources ; Power plants ; RADM(Regional Acid Deposition Model)
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB2001-104131 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 10/17/2002
Collation 16p
Abstract
Regional reductions in NOx emissions, principally from utility plants, are a focus for reducing urban and regional zone (O3) concentrations in the United States (U.S. EPA, 1998). In current regulatory analyses of benefits and costs of proposed NOx emissions reductions for O3 control, the change in fine particulate concentrations is also taken into account, because of major health concerns regarding fine particulates. Fine particulates are defined as particles which a diameter less than 2.5 microns. Regional oxidant production is generally NOx-limited. Therefore, significant reductions of NOx emissions and thereby NOx concentrations would be expected to change the regional oxidizing capacity of the atmosphere. From the one-atmosphere perspective, it is then natural to ask the question whether proposed NOx reductions will have any feedback on other pollutants. Fine particulate sulfate, henceforth sulfate, is a potential candidate because its production is associated with three different oxidants; hydroxyl radicals (OH), hydrogen peroxide (H202), and ozone (O3). In this paper the authors examine the feedback of NOx emission reductions on the production of sulfate.