The UK Air Quality Reanalysis (AQREAN) project combines an air quality forecast model with ground-based observations of pollutants to generate a long-term, consistent dataset of atmospheric composition across the UK and Republic of Ireland.
Data streams have been produced for the surface level as well as for the vertical extent of the model (surface to ~40km).
The AQREAN project was part of the UK Research and Innovation (UKRI) Strategic Priorities Fund (SPF) Clean Air Programme.