Fig. 6From: A review of atmospheric chemistry observations at mountain sitesSeasonal variations in C2H6, C2H2, C3H8, and C6H6 concentrations at eight mountain stations (a–w). The lines with circles denote the average NMHCs for observations during a particular period. The years in parenthesis denote the averaging periods. The red shaded bands and error bars denote the standard deviationsBack to article page