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Schematic illustration of the formation of halocarbons in seawater that undergo UV-induced reactions in the troposphere yielding reactive halogen species such as bromine monoxide (BrO) that act as oxidants for atmospheric pollutants, e.g., gaseous elementary mercury (Hg0g). Brominated very-short-lived substances (BrVSLS) may reach the lowermost stratosphere and participate in stratospheric ozone depletion.
