Fig. 2: Statistical information of gaseous elemental mercury (GEM) and carbon monoxide (CO) concentrations in each month.

Box plots of (a) gaseous elemental mercury (GEM) concentrations and (b) CO mixing ratios in June, July, August, and September.

Box plots of (a) gaseous elemental mercury (GEM) concentrations and (b) CO mixing ratios in June, July, August, and September.