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Modelling

Model Development

Urban scale

King's have developed a unique air pollution modelling and emissions capability; the 'London Air Quality Toolkit'

The LAQT has been used to provide air quality and emissions information to London policy makers at the Greater London Authority and Transport for London.

The model has been used extensively in the Mayors Air Quality Strategy, and for other major developments such as the Olympic games impacts and the current Ultra LowEmissions Zone developments.

UK and European scale

King's have over 10 years experience in running the regional scale USEPA model WRF-CMAQ and are part of a DEFRA consortia which is specifying a CMAQ-UK version of the model for use for policy applications. 

The model is deterministic in that it accounts for atmospheric physics and chemistry, and in the UK operates at 10km horizontal grid scale and hourly temporal scale. 

Emissions are split into 11 sectors, including energy and transport, with emissions release conditions included for large industrial processes.

Nesting regional and local scale models

King's are unique in combining local scale (ADMS) and regional scale (CMAQ) models to produce a model (CMAQ-urban Beevers et al., 2012) that is capable of modelling (hourly) all of Europe’s emissions and detailed enough to provide concentrations at 20m intervals in urban areas, where it’s needed most. 

CMAQ-urban is therefore able to assess air quality policy at European scales all the way down to changes on single roads.

Model evaluation

Both the LAQT and CMAQ-urban models were submitted to DEFRA’s UK model evaluation project.

Health impact assessments

Both the LAQT and CMAQ-urban have been combined with the life table approach (Miller and Hurley, 2003) to assess the health impacts of air pollution policy.

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