Ozone controversy.

'No ozone hole over the tropics would be observed by the conventional definition of an ozone hole', Lu notes in his report, 'as the total ozone over the tropics was above 220 Dobson Units even with a loss by 56 per cent'. DEPARTMENTS WORLDWATCH In July, an extraordinary research paper, documenting a huge, previously undetected ozone hole over the tropics, prompted a flurry of news stories. Other scientists have pointed out that ozone depletion in the tropics is nothing new and can be explained by the acceleration of a phenomenon known as the Brewer-Dobson circulation. [Extracted from the article]