Title: New exposure-based metric approach for evaluating O₃ risk to North American aspen forests

Author: Percy, K.E.; Nosal, M.; Heilman, W.; Dann, T.; Sober, J.; Legge, A.H.; Karnosky, D.F.

Year: 2007

Publication: Environmental Pollution. 147: 554-566.

Abstract: The United States and Canada currently use exposure-based metrics to protect vegetation from O₃. Using 5 years (1999-2003) of co-measured O₃, meteorology and growth response, we have developed exposure-based regression models that predict Populus tremuloides growth change within the North American ambient air quality context.