Figure 2: Frequency distribution of ozone concentrations

Frequency Distribution Of Ozone Concentrations

	AT	BE	DE	DK	ES	FI	FR	GB	GR	IE	IT	LU	NL	PT	SE

#ex	4254	607	11429	69	1035	53	1966	441	538	86	1273	155	945	n.a.	68
#st	110	20	342	6	80	11	97	32	10	6	44	5	37	4	6

n.a = number of exceedances not available

Figure 2. Frequency distribution of ozone concentrations (eight-hourly values; period 12.00-20.00) in excess of the 110 µg/m3 threshold for hourly values. For each country the total number of observed exceedances is given in row '#Ex', the number of stations is given in row '#St'. Frequency distributions are presented as Box-Jenkins plots indicating the minimum, the 25-Percentile, the 75-percentile and the maximum value. The data for Portugal did not allow for inclusion in this figure.