The site measures a number of aerosols and reactive gases to understand atmospheric composition at this site. The site is a relatively clean site, which is classified as a ‘background’ monitoring site for the UK, which was recently confirmed by Malley et al. (2014) in studying O3 concentrations in Europe.
|Figure 1: Dendrogram of 2007-10 EMEP sites derived by Ward's method of hierarchical clustering and reordered using non-negative matrix factorisation. The UK EMEP sites are identified with a red dot for those classified as Remote and a green dot for those classified as Polluted. The two UK EMEP sites of Harwell and Auchencorth are circled (Malley et al., 2014)|
Measurements at the site include speciated inorganic water aerosol composition of both PM2.5 and PM10 at an hourly resolution, aerosol size-distribution by an SMPS, large range of C2-C7 organic precursor gases (VOCs) are measured at hourly time resolution by GC-MS, mercury measured hourly in its three principal forms (elemental gaseous, reactive gaseous and particle-bound) by a Tekran analyser.
CEH is the lead organisation at this site, but also act as a local site operator for a number of national and international networks (Please refer to the list on the right).
Further details of several of the UK monitoring listed can be found here.