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You are here: Home / Data and maps / Maps and graphs / Annual changes in concentrations of PM10, O3 and NO2 in the period 2001–2010

Annual changes in concentrations of PM10, O3 and NO2 in the period 2001–2010

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Statistically significant trends (level of significance 0.1) are calculated by applying the Mann-Kendall test. The trend slopes are indicated with coloured dots when statistically significant. Red dots indicate increasing concentrations. The applied method is described in de Leeuw, 2012

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The data presented were derived from a consistent set of stations in all years. In 2006, France introduced a nation-wide system to correct PM10 measurements. French PM10 data prior to 2007 have been corrected using station-type dependent factors

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