Fig. 10From: A review of atmospheric chemistry observations at mountain sitesSeasonal variations in Ca2+ concentrations at four mountain stations. The lines with circles denote the average observed Ca2+ concentrations during a particular period. The years in parenthesis denote the averaging period. The red shaded bands and error bars denote the standard deviations. The concentrations of Ca2+ in TSP were measured at JFJ (a) and HPO (b) and those in PM2.5 were measured at MLO (c) and LAV (d)Back to article page