Fig. 2
From: Estimating ozone risks using forest monitoring networks—results for science, policy, and society
Time course of mean ozone concentrations for the considered weeks (left) and for the daytime (right). Mean concentration over 2007–2011 is represented by week for the mountain automatic unit (1601 m a.s.l.), the forest passive sampling sites (n = 15 in 2007, 20 in 2008–2011; mean elevation 1318 m a.s.l.), and the urban-suburban automatic units (n = 7, mean elevation 213 m a.s.l.); bars indicate the standard deviation among years (left). Daily development of the hourly mean of ozone concentration for a mountain and six urban units, referred to 2007 (right)