Introduction In Europe, the development of air pollution abatement strategies is founded on the ef fects-based approach, which includes the ozone-induced plant injury as one of the key effects to be minimized. Within this frame work, the risk of ozone damage to vegetation is related to numerical exposure and dose in dices (UNECE 2004b, Simpson et al. 2007, Tuovinen et al. 2007). Both types o...