Submitted by on 26 October 2015 2008 Sulphate precipitation concentration (SO4) Nitrate precipitation concentration (NO3-) Ammonium precipitation concentration (NH4+) PM10 surface concentration Nitrate surface concentration (NO3-) Ammonia surface concentration (NH3) Ammonium surface concentration (NH4+) Nitrogen dioxide concentration (NO2) Sulphate surface concentration (SO42-) Sulphur dioxide surface concentration (SO2) Nitric acid concentration (HNO3)