Fig. 2: Time series of the fraction of the 168-h backward trajectory transport time spent in marine areas (FRocean) and statistical relationship between FRocean and gaseous elemental mercury (GEM).

a Time series of hourly-averaged gaseous elemental mercury (GEM) concentrations and the fraction of the 168-h backward trajectory transport time spent in marine areas (FRocean) throughout the entire cruise. The yellow shaded areas indicate the Arctic summertime GEM rebound episodes observed in this study; b Statistical distribution of FRocean in different GEM concentration ranges. Source data are provided as a Source Data file.