Abstract
The daily mean SO 2 data available from 13 National Survey monitors in the Southampton Water neighbourhood were correlated with wind direction data. The directional daily SO 2 data were then analysed to determine the mean ground level concentration from an oil refinery, a power station and the city of Southampton. The drift into the area from sources outside was determined also. The long-term mean contributions from the three major emission sources accounted for 3 μg m −3 in a total mean ambient glc of 39 μg m −3. About 30 μg m −3 was accounted for by drift from outside the area, the balance, apparently, by numerous minor local sources within the area.
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