Fig. 3
From: Estimating ozone risks using forest monitoring networks—results for science, policy, and society
Mean ozone concentration (in μg m−3) per site and year (2007–2011). Ozone concentrations predicted by the geostatistical model are plotted against values measured by passive sampling. Solid line represents the bisector (1:1), while dashed lines show the uncertainty of measurement for passive samplers as declared by the manufacturer (20.5 % for an ozone concentration =80 μg m−3; 2013 revision; http://www.passam.ch/ozone.htm)