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Analysis of PM Correction Factors in France: Urban and Industrial Areas Study

This study delves into the analysis of PM correction factors in France, comparing automatic and gravimetric methods in urban (Paris area) and industrial areas (Normandy). The FDMS correction kit ensures real-time corrections at 50 reference sites equipped with TEOM/TEOM-FDMS devices. A national working group collaborates on technical matters, interpretation, and information dissemination. A test case in spring 2007 highlighted high PM episodes and missed forecasts, prompting discussions on potential causes like ammonium nitrate, high temperatures, ammonia emissions, forest fires, and Saharan dust. The study raises questions for international collaboration through the TFMM network and ponders potential involvement in the EMEP field campaign in 2009.

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Analysis of PM Correction Factors in France: Urban and Industrial Areas Study

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  1. PM correction factor in France Helène Marfaing (AIRPARIF) Olivier Le Bihan (INERIS) Français Mathe (Ecole des Mines de Douai) Laurence Rouïl (INERIS)

  2. Analysis of the results given by automatic and gravimetric methods

  3. Urban - Paris area Industrial - Normandy

  4. Metrological correction • FDMS correction kit : • equivalence with the gravimetric method (field campaigns : Paris, Le Havre, Marseille) • « automatic » measurement of the volatile fraction • real time correction • 50 “reference” sites equipped with TEOM/TEOM-FDMS devices • Determination of representative areas associated to these sites • The TEOM stations located in these areas are corrected following a near real time process by the observed difference [TEOM/FDMS-TEOM] at the reference site • Implemented since the 1st January 2007

  5. First feedback • A national working group involving the local associations in charge of air quality monitoring is still working hard : technical matters, interpretation, information to public and local authorities. • Test case : exceptional situation in spring 2007 (15th March- 15th April) • Occurrence of high PM episodes (100-130 ug/m3 (corrected), daily mean everywhere in France) • Episodes completely missed by the PREV’AIR forecasting system • Ammonium nitrate ? YES : 60-70 ug/m3 (15th March) -> influence of the high temperatures? Ammonia emissions from agriculture? • Forest fires in Russia? • Saharan dusts?

  6. Have you seen similar events in your own country? • Can the TFMM be a network supporting exchange of such experiences? • EMEP field campaign in spring or early spring 2009?

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