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Have primary emission reduction measures reduced ozone across Europe? An analysis of European rural background ozone trends 1996–2005

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Author(s): R. C. Wilson | Z. L. Fleming | P. S. Monks | G. Clain | S. Henne | I. B. Konovalov | S. Szopa | L. Menut

Journal: Atmospheric Chemistry and Physics
ISSN 1680-7316

Volume: 12;
Issue: 1;
Start page: 437;
Date: 2012;
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ABSTRACT
National and European legislation over the past 20 yr, and the modernisation or removal of industrial sources, have significantly reduced European ozone precursor emissions. This study quantifies observed and modelled European ozone annual and seasonal linear trends from 158 harmonised rural background monitoring stations over a constant time period of a decade (1996–2005). Mean ozone concentrations are investigated, in addition to the ozone 5th percentiles as a measure of the baseline or background conditions, and the 95th percentiles that are representative of the peak concentration levels. This study aims to characterise and quantify surface European ozone concentrations and trends and assess the impact of the changing anthropogenic emission tracers on the observed and modelled trends. Significant (p
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