Change in number of ozone exceedance days between 1993-1996 and 2000-2004

Figure Created 12 Nov 2009 Published 12 Nov 2009 Last modified 29 Nov 2012
The map shows the change in the average number of ozone exceedence days from April to September observed at regional background stations (EMEP monitoring stations) from the period 1990-1994 to the period 1999-2004, excluding the abnormally warm summer of 2003. A day is counted as an exceedence day when the daily maximal 8-hr-average ozone concentration exceeds 60 ppbV.

Metadata

Last upload:
30 Sep 2008
Temporal coverage:
,
Methodology:

The number of exceedence days at each location is plotted as a filled coloured dot at the location’s coordinates, with the colour changing according to the following levels: [< -12, -12 to -8, -8 to -4, -4 to 0, 0 to + 4, 4 to 8, 8 to 12, > 12] . At locations where the number of exceedence days is in the range [-1, 1], the dot is replaced by an open circle in the colour of the original interval it belonged to.

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Access is managed by the owner mentioned below. Please contact the owner for more information about their data policy.
Owners:
Joint Research Centre (JRC)
Figure type:
Map

Additional information

Ozone exceedance days meaning days where the maximal 8 hr average ozone concentration exceeds 120 micrograms per m³ (year 2003 excluded).

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For references, please go to https://www.eea.europa.eu/data-and-maps/figures/change-in-number-of-ozone-exceedance-days-between-1993-1996-and-2000-2004 or scan the QR code.

PDF generated on 25 May 2017, 01:25 AM

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