Service under development

The model computations are performed with utmost care, using state of the art modelling tools. However, please note that this new service is still under development, results are pilot tests runs and shouldn't be considered as fully validated results. Results are published as preliminary information and allow for a preview of upcoming products that will become operational in the coming year. We recommend to consider them with care and to contact TNO if users wish to use them for practical application.

Model simulations

For air quality policy important questions are:

  • how much air pollution can be attributed to local sources?
  • how much is imported through long-range transport?
  • which fractions can be attributed to anthropogenic activities, and which fraction is of natural origin?

These questions can be addressed by a chemistry transport model with detailed emission data, calculations of chemistry and microphysics, driven by meteorological data of high quality. In the current version of the service calculations are performed operationally by TNO (The Netherlands) using the LOTOS-EUROS model and emission information for major cities and all (urban) background monitoring sites in Europe listed in the e-Reporting. The latter consist of all European Environment Agency (EEA) member countries, including all EU Member States, as well as EEA cooperating countries. For the comprehensive list, please visit the EEA website.

It has to be stressed that these model calculations are done on a relatively coarse resolution (0.50ox0.25o longitude/latitude). Any values given represent the modelled values for the grid cells in which the monitoring stations are located and represent urban background air quality. Note that for particulate matter state-of-the-art models underestimate the observed concentrations systematically due to missing sources and a lack of understanding in the formation pathways of organic aerosol.