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RECORD NUMBER: 22 OF 57

OLS Field Name OLS Field Data
Main Title Field Evaluation of a Method for Estimating Gaseous Fluxes from Aera Sources Using Open-Path FTIR.
Author Hashmonay, R. A. ; Natschke, D. F. ; Wagoner, K. ; Harris, D. B. ; Thompson, E. L. ;
CORP Author ARCADIS Geraghty and Miller, Inc., Research Triangle Park, NC. ;Washington Univ., Seattle. Dept. of Environmental Health.;Environmental Protection Agency, Research Triangle Park, NC. Air Pollution Prevention and Control Div.
Publisher 1999
Year Published 1999
Report Number EPA-68-C-99-201; EPA/600/A-00/051;
Stock Number PB2000-108055
Additional Subjects Emission factors ; Air pollution sampling ; Mathematical models ; Study estimates ; Fourier transformation spectrometers ; Infrared spectroscopy ; Concentration(Composition) ; Stationary sources ; Plumes ; Field tests ;
Holdings
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Status
NTIS  PB2000-108055 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 11/07/2000
Collation 18p
Abstract
The paper gives preliminary results from a field evaluation of a new approach for quantifying gaseous fugitive emissions of area air pollution sources. The approach combines path-integrated concentration data acquired with any path-integrated optical remote sensing (PI-CRS) technique and computed tomography (CT) technique. In this study, and open-path Fourier transform infrared (CP-FTIR) instrument sampled path-integrated concentrations along five radial beam paths, in a vertical plane downwind from the source. A meteorological station collected measurements of wind direction and speed. Nitrous oxide (N2O) was released from a controlled area source simulator. The innovative CT technique, which applies the smooth basis function minimization method to the beam data in conjunction with measured wind data, was used to estimate the total flux from the simulated area source. The new approach estimates agreed with the true emission rates in unstable atmospheric conditions and consistently overestimated the true emission rate in neutral atmospheric conditions.