WMS for sulphur and nitrogen atmospheric Concentration Based Estimated Deposition (CBED), 2013-2015

This web map service (WMS) show Concentration Based Estimated Deposition (CBED) values of sulphur and nitrogen atmospheric deposition for 5x5 kilometre (km) grid squares of the UK averaged over the years 2013 to 2015.

The maps show deposition values (kg ha-1 year-1) for oxidised nitrogen (NO2/NO3), reduced nitrogen (NH3/NH4) , non-marine sulphur (SO2/SO4) and base cations (Ca+Mg) . These total deposition values are the sum of four components calculated separately: wet deposition, dry deposition of gases, dry deposition of particulate matter and cloud droplet deposition.

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 provided.

Publication date: 2018-09-11

Use this service

Open in map viewer

URL: https://catalogue.ceh.ac.uk/maps/fe7886dc-1953-40f1-acf7-2fc32ebe1105?request=getCapabilities&service=WMS&cache=false&

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Study area
Temporal extent
2013-01-01    to    2015-12-31

Provenance & quality

The Concentration Based Estimated Deposition (CBED) methodology 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. The site-based measurements are first interpolated to generate maps of concentrations for the UK. The ion concentrations in precipitation are combined with an annual precipitation map from the UK Meteorological Office to generate values of wet deposition. Gas and particulate matter concentration maps are combined with spatially distributed estimates of habitat-specific deposition velocities to generate dry deposition for 5 land cover categories: forest, moorland, grassland, arable and urban. The deposition to the 5 land cover categories are combined, depending on the relative proportions of different land cover categories in the 5x5 km grid square, to generate values for grid square averaged deposition. Dry deposition includes deposition of gases (Sulphur Dioxide (SO2), Nitric Acid (HNO3), Nitrogen Dioxide (NO2) and Ammonia (NH3) and particulate matter (sulphate, nitrate, ammonium, calcium and magnesium) to vegetation. For critical load exceedance calculations, deposition values for moorland are applied to all non-woodland habitats, and deposition values for forest are applied to all woodland habitats.

Data processing was done using the GenStat programme and results output as text files, these were then converted to tif images to generate this web map service.

Correspondence/contact details

Dr. Bill Bealey
Centre for Ecology & Hydrology
Bush Estate
EH26 0QB

Other contacts

NERC EDS Environmental Information Data Centre

Additional metadata

base cations,  Concentration Based Estimated Deposition (CBED),  deposition,  infoMapAccessService nitrogen,  pollutant,  sulphur
Atmospheric Conditions
Spatial reference system
OSGB 1936 / British National Grid
Last updated
25 June 2021 18:46