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Air Quality Modelling 

Air quality modelling is an important tool for developing and evaluating air quality policy. Defra and the Devolved Administrations use air quality models for assessing compliance with EU Directives and to inform negotiations on policy changes. Models provide a wider assessment of the state of air quality across the UK both in terms of airborne concentrations and potential human exposure and the deposition of acidifying and eutrophying pollutants. More details regarding the models used by Defra and the Devolved Administrations can be found on the Air Modelling for Defra page.

Developing Defra's Modelling Capacity

Defra and the Devolved Administrations use a number of models to meet a range of different requirements. Some of these models have been created specifically for Defra’s needs while others have been produced by adapting existing models. It is important that the models used are fit for purpose, are not extended beyond their capabilities and are capable of incorporating relevant advances and innovation in modelling capability. It is also important that there is dialogue and interaction between the modelling community and also with Defra and that model capability is well understood.

Defra is currently undertaking a number of activities in relation to its air quality modelling.

  • Defra has commissioned a Modelling Review by an independent expert steering group.
  • Defra has therefore organised a Model Intercomparison Exercise and created a forum through this activity for the modellers to communicate.
  • A strategy for future air quality modelling in Defra will be developed in 2011.

Page last modified: 03 October 2011