Modeling of SO2, Pb and Cd atmospheric deposition over a one-year period
Identifieur interne : 000919 ( Main/Exploration ); précédent : 000918; suivant : 000920Modeling of SO2, Pb and Cd atmospheric deposition over a one-year period
Auteurs : Jean-Michel Giovannoni [Suisse]Source :
- Atmospheric Environment Part A, General Topics [ 0960-1686 ] ; 1993.
Abstract
Atmospheric deposition of SO2, and fine particles of Pb and Cd are calculated over a one-year period in a 66 km2 airshed with a segment-puff model. Emission variations, hourly mixing heights and meteorological values are considered to compute monthly averages of concentrations and deposition. Dry deposition is calculated by means of deposition velocities which are season- and land use-dependent. Wet deposition is determined using a washout coefficient. To assess the simulation performance, calculated SO2 results from the combination between the deposition velocity, the windspeed and direction and the location and type of sources. As annual averages, results for dry plus wet deposition are computed to be 0.84 mg m−2d−1 for sulfur, 4.15 μgm−2d−1 for lead and 0.0013 μgm−2d−1 for cadmium. A variation factor is derived from a sensitivity analysis. This factor amounts to 2.3−2.8 for the concentrations and 2.6−3.1 for the deposition, depending on the pollutant.
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DOI: 10.1016/0960-1686(93)90285-7
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