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Influences on and patterns in total gaseous mercury (TGM) at Harwell, England

Kentisbeer, J.; Leeson, S.R.; Clark, T.; Malcolm, H.M.; Cape, J.N.. 2015 Influences on and patterns in total gaseous mercury (TGM) at Harwell, England. Environmental Science: Processes & Impacts, 17 (3). 586-595. 10.1039/C4EM00652F

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Abstract/Summary

Total gaseous mercury (TGM) was monitored during 2013 at the rural monitoring site, Harwell, England using the Tekran 2537A monitoring system. Average TGM for the year was 1.45 ± 0.24 ng m−3. This is comparable to other northern hemisphere studies, but on average 0.5 ng m−3 higher than at its sister monitoring station at Auchencorth Moss, Scotland, but 14% lower than that found in a similar study at the same location of 1.68 ng m−3 in 1995/6. Using wind sector analysis we show the important influence of local emissions, with our data showing that the largest influence on TGM observed is that of the adjacent Science & Innovation campus, making the site more a ‘suburban background’. By using co-located measurements of black carbon and sulphur dioxide as tracers, we present an initial investigation into the impact of the closure of Didcot A coal fired power station, which ceased operating in March 2013. Further analysis using air mass back trajectories shows the long-range contribution to TGM from continental Europe, and that the lowest levels are associated with marine air masses from the west.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1039/C4EM00652F
CEH Sections: CEH Fellows
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ISSN: 2050-7887
NORA Subject Terms: Atmospheric Sciences
Date made live: 26 Jan 2015 15:54 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/509493

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