Record Display for the EPA National Library Catalog
RECORD NUMBER: 20 OF 50
|OLS Field Name||OLS Field Data|
|Main Title||Flux Measurements of Ozone and Nitric Acid at Coastal and Mid-Continental Sites.|
|Author||Ellestad, T. G. ; Clarke, J. F. ; Finkelstein, P. L. ;|
|CORP Author||Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.|
|Additional Subjects||Nitric acid ; Ozone ; Flux(Rate) ; Air pollution ; Coasts ; Atmospheric chemistry ; Concentration(Composition) ; Gradients ; Eddies ; Velocity measurement ; Diurnal variations ; Models ; Flow measurement ; Environmental transport ; Turbulence ; Nitrogen compounds ; Dry deposition flux ; National Dry Deposition Network ; Flux calculations ; Direct measurement|
A system for measuring the turbulent fluxes of ozone, nitric acid, and other gases was operated at two sites in 1994. These direct measurements of fluxes are for comparison with those calculated for National Dry Deposition Network sites using an inferential model approach. Ozone flux was determined by the eddy correlation technique, while nitric acid flux was obtained from measurements of concentration gradient and vertical exchange coefficient. Ozone fluxes over corn at Bondville, IL, showed strongly diurnal patterns with nighttime values about one-tenth the daytime peak values.