Units: µg m-3 annual mean
Resolution: 1 km
Year: 2019 - 2021 (3 year average)
Data provided by: Ricardo Energy & Environment
Additional Info:
The Pollution Climate Mapping Model is used to produce background maps, 1x1 km grids of pollutant concentrations for NOx. The Pollution Climate Mapping (PCM) model is a collection of models designed to fulfil part of the UK's EU Directive (2008/50/EC) requirements to report on the concentrations of particular pollutants in the atmosphere. The annual mean background NOx concentration map has been calculated by summing the contributions from:
- Distant sources (characterised by the rural background concentration)
- Large point sources
- Small point sources
- Local area sources
The area source model has been calibrated using data from the national automatic monitoring networks. At locations close to busy roads an additional roadside contribution was added to account for contributions to total NOx from road traffic sources. See Page 16 of referenceed report for full methodology.
References:
Technical report on UK supplementary assessment under The Air Quality Directive (2008/50/EC), The Air Quality Framework Directive (96/62/EC) and Fourth Daughter Directive (2004/107/EC) for 2014. Report for The Department for Environment, Food and Rural Affairs, The Welsh Government, The Scottish Government and The Department of the Environment for Northern Ireland Ricardo Energy & Environment/R/3459.