Concentration and isotopic composition of bromine and chlorine in Antarctic sea ice

Abstract This work presents the first investigation of Br and Cl isotopic partitioning in Southern Ocean sea ice. The sea ice samples characterized were collected during the Australian-led Sea Ice Physics and Ecosystem eXperiment-2 (SIPEX-2) marine voyage in austral spring of 2012 (26 Sept – 10 Nov), within the area bounded by 115–125°E and 62–66oS off the East Antarctic coast. Bromine concentrations ranged from 710 ± 20 μg L-1 to 31440 ± 570 μg L-1 and chlorine concentrations ranged from 218 ± 12 mg L-1 to 7945 ± 351 mg L-1. Bromine and chlorine concentrations were positively correlated with a slope of 0.0038 (r=0.996, p