Annual averages in rural, suburban and urban locations were calculated from the output of the EMEP4UK model version 4.3. The rural, suburban and urban AURN observation site locations were used to obtain the latitude and longitude of the model output for the annual site type averages. Therefore, for each year and each pollutant a different number of data values (locations of observation sites) contribute towards the annual averages. The number of locations in each average can be found in the table at the bottom of the page. These averages are graphed below for Nitrogen Dioxide, Ozone, PM10, PM2.5 and Sulfur Dioxide respectively.
Links to the spatial distribution of pollutants over the UK can be found in the table on the right. Pollutants included in the mapped output are: dry deposition of reduced Nitrogen, surface Ozone, surface Ammonia, surface Ammonium, surface Nitric Oxide, surface Nitrogen Dioxide, surface PM10, surface PM2.5, surface Sulfur Dioxide, surface Sulfate, surface total Nitrate and wet deposition of reduced Nitrogen.
The hourly model output compared to the AURN observation sites can also be found, arranged by year, from the EMEP4UK OUTPUT drop-down menu or from the links on the pollutant map pages.