Record ozone loss over the North Pole

ScienceDaily (2011-04-08) -- In the past few weeks, exceptional weather conditions have led to unprecedented ozone depletion over the Arctic. Ground and satellite observations by researchers as well as French models show that ozone loss reached around 40 percent at the end of March. The phenomenon was caused by an extremely cold and persistent stratospheric winter, resulting in significant ozone destruction, which, unusually, continued into spring.