Air pollution by ozone in Europe in summer 2005 Preliminary results Libor Cernikovsky

1. Air pollution by ozone in Europe • in summer 2005 • Preliminary results • Libor Cernikovsky • 10th EIONET Workshop • on Air Quality Management and Assessment • Vilnius, 17-18 October, 2005 European Topic Centre on Air and Climate Change

2. Legislation • Under Directive 2002/3/EC MS shall provide: • monthly data: before the end of the following month information on the exceedance of information and alert thresholds (1h max > 180 & 240 µg/m3) • April – September data: not later than 31st October information on the exceedances of long-term objective for the protection of human health (8h day-max > 120 µg/m3) and 1h monthly maximums for all stations European Topic Centre on Air and Climate Change

3. Related information • reporting forms, guidelines documents and other information available on the ETC/ACC web pagehttp://air-climate.eionet.eu.int/databases/o3excess • and EEA web pagehttp://eea.eu.int European Topic Centre on Air and Climate Change

4. Monthly summary information • published on the ETC/ACC web page European Topic Centre on Air and Climate Change

5. Summary table European Topic Centre on Air and Climate Change

6. Location and type of stations European Topic Centre on Air and Climate Change

7. Exceedances of the information threshold European Topic Centre on Air and Climate Change

8. Exceedances of the alert threshold European Topic Centre on Air and Climate Change

9. Preliminary results • based on data received before 3rd October • incomplete August data • no September data • in comparison with summer 2004 and previous summers European Topic Centre on Air and Climate Change

10. Distribution of exceedances 2004 2005 European Topic Centre on Air and Climate Change

11. Number of days: information threshold • Number of days on which at least one exceedance of the threshold value • observed per country and per month – information threshold 2004 2005 European Topic Centre on Air and Climate Change

12. Number of days: alert threshold 2004 2005 European Topic Centre on Air and Climate Change

13. Percentage of stationsreporting any exceedance 2004 2005 European Topic Centre on Air and Climate Change

14. Frequency distribution • of ozone concentrations in excess of the information threshold • Box-Jenkins plots: • minimum value • 25th and 75th percentile • maximum value 2004 2005 European Topic Centre on Air and Climate Change

15. Average number of exceedance per station in regions • North-western Europe: UK, IE, NL, BE, LU , FR north of latitude 45° • Central and eastern Europe: DE, PL, CZ, SK, HU, AT, CH • Southern Europe: south of latitude 45 °, PT, ES, IT, SI, GR, CY, MT • Northern Europe: has not been included because of the low number of exceedances. European Topic Centre on Air and Climate Change

16. Summer report • tight deadlines:... 31st October for data delivery... 23rd November delivery to to EEA • impossible to process late delivered data ! • provisional non-validated data used European Topic Centre on Air and Climate Change

17. Remarks on data • All values are to be expressed in µg/m3. The volume must be standardised at the following conditions of temperature and pressure: 293 K and 101,3 kPa • The time is to be specified in Central European Time. • Do not forget to make the data available to public view on CDR. European Topic Centre on Air and Climate Change

18. Summer reports • available on EEA web page http://reports.eea.eu.int/search_results?SearchTitle=ozone European Topic Centre on Air and Climate Change

19. Summer 2004 report – mistake ! • Map 3.1 • Number of days with exceedance of the information threshold • Corrected EEA Technical report No 3/2005 is available on EEA web page. European Topic Centre on Air and Climate Change

20. Discussion • Measured value of 180 and 240 µg/m3. is not the threshold exceedance... European Topic Centre on Air and Climate Change