Fig. 11From: A review of atmospheric chemistry observations at mountain sitesSeasonal variations in SO2 concentrations at two mountain stations. The thick and thin lines with circles denote the monthly average SO2 in the year of the volcanic eruption and in the pre- and post-eruption years, respectively. The eruptions of Eyjafjallajökull volcano and Miyake-jima volcano occurred in 2010 (a) and in 2000 (b), respectivelyBack to article page