BIPHOREP introduction 4/6

FIGURE 3, ozone exposure index, 9.7K

Figure 3. The forests in the southern parts of the boreal zone are more affected by anthropogenic ozone than the northern parts, mainly due to the high precursor emissions from continental Europe. The exposure index values are calculated according to the definitions by the UN-ECE Critical Levels Workshop in Kuopio, 1996, using background ozone monitoring data.

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