Size-Segregated Non-Sea Salt Halide Concentrations in Marine Aerosols in Bermuda

Tropospheric reactive halogens are a sink for ozone and influence the oxidizing capacity of the troposphere. Gas-phase halogen radicals originate from heterogeneous reactions on the surface of halide-containing aerosol. These reactions lead to enrichment or depletion of aerosol halides relative to their ratios with sodium in sea water. We present daily observations of chloride enrichment, bromide enrichment, and iodine in sub- and super-micron aerosol collected in June 2022 in Bermuda during the Bermuda boundary Layer Experiment on the Atmospheric Chemistry of Halogens (BLEACH) campaign. We compare these measurements with simultaneous observations of ozone and gas-phase halogen concentrations in order to understand the relationship between aerosol and gas-phase halogens and their impact on tropospheric ozone abundance.