Spatial distribution of bromine and iodine in the snowpack from Northern Victoria Land, East Antarctica

We present total bromine, iodine and sodium concentrations in the snowpack from Northern Victoria Land, East Antarctica. We collected 15 surface snow samples from the Ross sea coastal region and the inland of the Northern Victoria Land during the 2015/2016 Korean Antarctic Research Program. Total Bromine, iodine and sodium were analyzed using inductively coupled plasma-sector field mass spectrometry (ICP-SFMS) equipped with a Peltier-cooled cyclonic spray chamber (PC3). Bromine and iodine measurements were validated using a certified reference material, BCR-611. Major ions (Na⁺, Ca²⁺, Cl^-, CH₃O₃S^-, SO₄^2-) were also analyzed by ion chromatography (IC). Bromine concentrations ranged from 0.35 ng mL^-1 to 42.0 ng mL^-1, with a mean concentration of 10.8 ng mL^-1. Iodine concentrations ranged from 0.06 ng mL^-1 to 0.89 ng mL^-1. Sodium concentrations ranged from 29.5 ng mL^-1 to 18,491 ng mL^-1. We find the highest bromine and iodine values are observed at coastal sites and lower values in the interior and high altitude sites. Strong bromine and iodine enrichment found in the inland sites.