Indicators Concept Applied to a European City: The Ile de France Area during ESQUIF Campaign

  • Frédérique Millard
  • Gérard Toupance


In 1995, S. Sillman developed the photochemical indicators concept for identifying ozone chemical regimes. This concept was only applied and validated for American atmospheric situations. As part of the ESQUIF campaign, we have calculated H2O2/HNO3, O3/NOy, O3/NOz indicators for the Ile de France area. The chemistry-transport 3D model A3UR, developed by IFP, LISA and EDF was used. We compared transition values found for the Paris area to those proposed by S. Sillman as universal ones. Our results make us think that indicators transition values depend on the atmospheric situation studied.


Peroxide Ozone 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • Frédérique Millard
    • 1
  • Gérard Toupance
    • 1
  1. 1.LISA (Laboratoire Interuniversitaire des Systèmes Atmosphériques) - CNRS UMR 7583Université Paris 7 et Paris 12Créteil cedexFrance

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