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Issue 3, 2015
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Influences on and patterns in total gaseous mercury (TGM) at Harwell, England

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Abstract

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.

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

  • This article is part of the themed collection: Mercury
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Publication details

The article was received on 25 Nov 2014, accepted on 16 Jan 2015 and first published on 22 Jan 2015


Article type: Paper
DOI: 10.1039/C4EM00652F
Citation: Environ. Sci.: Processes Impacts, 2015,17, 586-595
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    Influences on and patterns in total gaseous mercury (TGM) at Harwell, England

    J. Kentisbeer, S. R. Leeson, T. Clark, H. M. Malcolm and J. N. Cape, Environ. Sci.: Processes Impacts, 2015, 17, 586
    DOI: 10.1039/C4EM00652F

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