Iodine, the same chemical added as a nutrient to table salt, is an atmospheric trace element emitted from oceans that efficiently destroys ozone. Low ozone in airborne dust layers is frequently observed but poorly understood. New research led by the University of Colorado, Boulder, shows that dust is a source of iodine, indicated by aircraft observations of iodine monoxide ions inside lofted dust layers from the Atacama and Sechura deserts in Chile...
