Concentration Based Estimated Deposition (CBED)

The Concentration Based Estimated Deposition (CBED) model generates 5x5 km resolution maps of wet and dry deposition of sulphur, oxidised and reduced nitrogen, and base cations from measured concentrations of gases and particulate matter in air and measured concentrations of ions in precipitation. These data are collected at sites in the UK Eutrophying and Acidifying Pollutants (UKEAP) network. Habitat-specific data are provided for (i) moorland/short vegetation everywhere, and (ii) forest everywhere. Additionally, the grid square average over multiple land cover types (i.e. arable, grassland, forest, moorland, urban) is also calculated. The habitat-specific data are recommended for use with critical loads for the calculation of critical load exceedances. The work in generating and compiling the dataset has been funded by the Centre for Ecology and Hydrology (CEH) and various Department for Environment, Food & Rural Affairs (Defra) contracts.

CBED datasets are provided as a 3 year rolling mean (e.g. 2013-2015) with each consecutive year updated on an annual basis.

Supplemental information

Other useful information regarding this data collection:

UK-Air is the national UK website for the dissemination of air quality data and provides information on air pollution to members of the public.
The UK Eutrophying and Acidifying Pollutants (UKEAP) network project combines two Defra atmospheric pollutant monitoring projects, which have measured air pollutants at rural sites across the UK over the past two decades.
APIS provides a comprehensive source of information on air pollution and the effects on habitats and species. APIS has been developed in partnership by the UK conservation agencies and regulatory agencies and the Centre for Ecology and Hydrology. The Site Relevant Critical Loads tool for protected site in the UK uses CBED data for calculating critical loads