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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:26 |
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Conference: Bucharest University Faculty of Physics 2001 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
DRY GROUND DEPOSITION OF POLLUTANTS – SENSITIVITY STUDY
Authors:
George Mocioaca, Sabina Stefan
Affiliation:
University of Bucharest, Faculty of Physics, P.O. Box, MG-11, Bucharest, Romania
E-mail:sabi@scut.fizica.unibuc.ro
E-mail
Keywords:
Abstract:
The aim of this work is to study the dry ground deposition of the pollutants under various atmospheric conditions using different models and analytical solutions.
The analytical solutions based on K-theory given by Rao (1981) and by Zanetti (1990) for an elevated continuous point source have been included in a Gaussian integrated puff model and the model have been run for different stability classes.
The influence of the horizontal, , and vertical, , dispersion parameters parameterized based on a convective scaling, on dry deposition has been also tested.
The comparison of the simulated ground deposition values with the field observations at different downwind distances for various settling and deposition velocities clearly show the importance of the parameterizations used by the models and the necessity of improving them further.
References
Levine, S.Z., and S.E. Schwartz, 1982: In-cloud and below-cloud scavenging of nitric acid vapour, Atm. Env., 16, 1725.
Mircea,M., S.?tefan,1998:A theoretical Study of the Microphysical Parameterization of the Scavenging Coefficient as a function of precipitation type and rate, Atmospheric Environment, vol.32, Nr. 11, pg. 2931 – 2938
Rao, S. K., 1981: Analytical solutions of a gradient transfer model for plume deposition and sedimentation, NOAA Technical Memorandum ERL ARL-109.
Seinfeld, J., 1992:Atmospheric Chemistry and Physics of Air Pollution, John Wiley &Sons, 800pp.
Zanetti,P., 1990: Air Pollution Modelling, Boston, 500pp.
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