1. A meeting on URBAN AIR QUALITY MODELLING hosted by Air Pollution Research in London Tuesday 4 March 2003 Modelling Air Quality in Urban Canyons Dr Sotiris Vardoulakis

2. Monitoring Sites in Paris Rennes Voltaire Leclerc

3. passive tubes Analysers & active samplers Anemometer & weather station wind 2.5 2.0 4.5 3.1 h: 20.2 m h: 4.9 m h: 4.2 m h: 17.2 m 1.3 30 m 25 m INERIS h: 2.8 m Benzene (ppb) Boulevard Voltaire - December 1998

4. h: 17.73 m 2.8 m 1.5 2.8 2.1 1.1 h: 17.8 m h: 4.3 m h: 1.6 m h: 17.8 m h: 4.4 m h: 3.3 m h: 1.6 m 1.7 1.5 1.6 2.5 m Rue de Rennes - July 1999 22 m wind INERIS 25 m 0.5 0.4 Benzene (ppb)

5. INERIS wind 2.62.5 1.8 1.2 1.7 2.9 0.9 1.1 1.4 Avenue Leclerc - July 2001 h: 16.5 m h: 7.8 m h: 1.5 m 24 m h: 2.6 mh: 2.7 m 45 m h: 2.6 m h: 9.1 m h: 16.3 m h: 30.5 m h: 2.8 m 36 m h: 3.3 m 0.8

6. Benzene (ppb) INERIS wind 2.62.5 1.8 1.2 1.7 2.9 0.9 1.1 1.4 Avenue Leclerc - July 2001 24 m 45 m 36 m 0.8

7. Street Canyon Modelling Dispersion Models: OSPM - AEOLIUS - STREET Emission Factors: Buckland - IMPACT - Touaty Meteorological Data: Montsouris - St. Jacques - Orly Airport

8. Boulevard Voltaire (regular canyon)

9. Rue de Rennes (regular canyon)

10. Avenue Leclerc (asymmetric canyon)

11. Conclusions Urban air quality: Strong spatial variability BTX diffusive samplers: Efficient multi-site monitoring tool Regular canyons: Semi-empirical models might suffice Complex urban locations: Advanced models required

12. Acknowledgments Pr Bernard Fisher (Environment Agency) Pr Koulis Pericleous (Univ. of Greenwich) Dr Norbert Gonzalez-Flesca (INERIS) Mairie de Paris sotiris.vardoulakis@lewes.gov.uk