Sulphate in atmospheric particulate at five sites in Norwich (U.K.): Use of national survey archive filters |
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| Affiliation: | 1. British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK;2. University of East Anglia, Norwich NR4 7TJ, UK;3. University of York, Heslington, York YO10 5DD, UK;1. Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York YO10 5DD, UK;2. Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China;3. National Centre for Atmospheric Science, University of York, York YO10 5DD, UK |
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| Abstract: | ![]()
Air sample filters from a Local Authority archive have been analyzed for sulphate using XRF. This has allowed an assessment to be made of the spatial distribution of 24-h sulphate concentrations in the city of Norwich in eastern England, over a 9-month period. The overall mean sulphate concentration was 10.4 μg m−3, with a range of overall mean values between the sites of 7.7–12.2 μg m−3. This spatial variability within the city is similar to the spatial variability between cities found in another previous study. The mean SO2−4/SO2 and smoke/SO2−4 ratios at the different sites are similar, but there are distinct variations in the overall mean ratios over the measurement period. There appear to be relationships between the SO2−4/SO2 ratio and temperature and humidity. The ratios are also related to wind direction, with some evidence that a proportion of the SO2−4 in the urban atmosphere of Norwich originates via long-distance transport from the east. |
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