1 ROLE OF SNOW DEPOSITION OF PERFLUOROALKYLATED SUBSTANCES AT COASTAL LIVINGSTON ISLAND (MARITIME ANTARCTICA) SUPPORTING INFORMATION Paulo Casal 1 , Yifeng Zhang 2 , Jonathan W. Martin 2 , Mariana Pizarro 1 , Begoña Jiménez 3 , and Jordi Dachs 1* 1 Institute of Environmental Assessment and Water Research, Spanish National Research Council (IDAEA-CSIC), Barcelona, Catalonia, Spain 2 Division of Analytical and Environmental Toxicology, Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta Canada 3 Department of Instrumental Analysis and Environmental Chemistry, Institute of Organic Chemistry (IQOG-CSIC), Madrid, Spain * Corresponding author email: jordi.dachs@idaea.csic.es