Fig. 3: Potential source contribution function (PSCF) analysis of gaseous elemental mercury (GEM) and spatial distribution of the sea-ice fraction during this cruise.

a Results of the weighted potential source contribution function (WPSCF) analysis for gaseous elemental mercury (GEM) over the entire observation period, and b spatial distribution of the sea ice fraction throughout the observation period. The map was created with the scientific visualization software MeteoInfo (a), and Ocean Data View37 (b), respectively. Source data are provided as a Source Data file.