Comparison of annual variations in ozone 50th, 98th and 99.9th percentile values (calculated from hourly mean concentrations) and the frequency distribution of estimated trend (in (microgram/m3) per year).
For references, please go to www.eea.europa.eu/soer or scan the QR code.
This briefing is part of the EEA's report The European Environment - State and Outlook 2015. The EEA is an official agency of the EU, tasked with providing information on Europe's environment.
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