evidence: The ozone hole did not cause global warming Because the ozone layer normally blocks ultraviolet (UV) light, an ozone hole allows more UV light than usual to reach the surface. However, the additional energy added to the Earth system from the ozone hole is so small that it couldn’t be responsible for the warming trend that’s been occurring. [...] And even though the ozone hole can’t explain global-scale temperature trends over the past few decades, models do suggest that changes in atmospheric circulation due to the ozone hole have contributed to seasonal surface temperature trends in a few Southern Hemisphere locations, including warming of high latitudes of the Southern Ocean in late winter, and summertime warming of the Antarctic Peninsula and cooling of the continental interior.