HETEROGENEOUS PROCESSES INVOLVING SODIUM-HALIDE PARTICLES AND OZONE -MOLECULAR BROMINE RELEASE IN THE MARINE BOUNDARY-LAYER IN THE ABSENCEOF NITROGEN-OXIDES

Heterogeneous reactions involving sodium halide particles and gaseous ozone were investigated by reaction-chamber experiments in order to ex plore the possible role of sea-salt particles as a source of reactive halogen species in the troposphere, In the studies of sodium bromide a nd ozone, it was found that gaseous bromine molecules were produced in the presence of water vapor with which the salts were almost deliques ced. This preliminary result suggests that reactive bromine species ca n be released from sea-salt to the atmosphere of the marine boundary l ayer in the absence of nitrogen oxides.