Research Spotlight: Ozone hole shift exposed South America to increased ultraviolet light


  • Leslie Ofori,

  • Ernie Tretkoff


The ozone layer, which protects humans, plants, and animals from potentially damaging ultraviolet (UV) light from the Sun, develops a hole above Antarctica in September that typically lasts until early December. However, in November 2009, that hole shifted its position, leaving the southern tip of South America exposed to UV light at levels much greater than normal.