||Design and Implementation of a Transportable System for Direct Measurement of Dry Deposition Fluxes.
Clarke, J. F. ;
Ellestad, T. G. ;
Finkelstein, P. L. ;
Edgerton, E. S. ;
Bowser, J. ;
||Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. ;National Oceanic and Atmospheric Administration, Research Triangle Park, NC. Atmospheric Sciences Modeling Div. ;Environmental Science and Engineering, Inc., Durham, NC.
Dry methods ;
Air pollution sampling ;
Portable equipment ;
Design criteria ;
Measuring instruments ;
Mathematical models ;
Sulfur dioxide ;
Nitric acid ;
National Dry Deposition Network ;
Dry Deposition Inferential Model
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||Dry deposition of air pollutants is expensive and difficult to measure. Hicks et al. (1985) proposed the dry deposition inferential model as an alternative approach to direct measurements of dry deposition for large network operations. The inferential model determines dry deposition fluxes as the product of a measured concentration and a modeled deposition velocity. EPA has recently initiated a program to directly measure dry deposition fluxes to evaluate and improve the inferential dry deposition model. A transportable system for directly measuring fluxes of O3, SO2, and HNO3 was built and deployed at two National Dry Deposition Network (NDDN) sites in 1994. The system, instrumentation, and sampling protocol are described briefly herein, along with some preliminary data from the 1994 field program.
||Presented at the AMS Symposium on Boundary Layers and Turbulence (11th). See also PB93-178242. Prepared in cooperation with National Oceanic and Atmospheric Administration, Research Triangle Park, NC. Atmospheric Sciences Modeling Div. and Environmental Science and Engineering, Inc., Durham, NC.
||PC A02/MF A01