Short-term measures for the control of ozone peaks: expertise from CTM simulations |
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| Authors: | Fanny Lasry Isabelle Coll Sylvain Fayet Maxime Havre Robert Vautard |
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| Institution: | (1) Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), CMC–Université Paris 12, 61 avenue du Général de Gaulle, 94010 Créteil Cedex, France;(2) AIRMARAIX, 67-69 avenue du Prado, 13286 Marseille Cedex 6, France;(3) Laboratoire des Sciences du Climat et de l’Environnement (LSCE), Orme des merisiers, 91190 Gif-sur-Yvette Cedex, France |
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| Abstract: | In Europe, in case of the observation or the forecast of a photochemical event, punctual and local reductions in anthropogenic
emissions can be triggered at the regional scale. Although the necessity for the establishment of such measures appears to
be justified by bad air quality records over large European cities, individual short-term action plans (STAPs) have been blindly
elaborated by regional authorities. Moreover, as they impose industrial and road traffic emission restrictions, these measures
have an elevated economical cost. It is consequently crucial to determine their efficiency and potential for ozone peak reduction.
The study presented in this paper aims to draw up an expertise on standard European STAPs, through the example of a French
Mediterranean city. The objective is to determine and investigate the impact of current STAPs on ozone peak formation and
to test ways to optimise their efficiency. In this frame, a set of emission scenarios has been elaborated and tested with
the chemistry-transport model CHIMERE on the Berre–Marseille area. Simulations have shown that the tested action plans are
not sufficient to eradicate severe ozone peaks and that more drastic restrictions on emissions are required to significantly
affect ozone plumes. However, results also showed that the potential for ozone reduction remains small, with a maximum impact
of only 5 ppbv for feasible STAPs. Finally, a temporal analysis of the ozone-emission relationship was engaged in order to
optimise their application. |
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| Keywords: | 2010 NEC directive Short-term action plans Emission scenarios Ozone production ESCOMPTE |
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