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SpaceAdmiral writes "Since the implementation of the Montreal Protocol, which limited ozone-destroying gasses like CFCs, the Earth's ozone layer has been recovering. However, new studies show that the ozone in the lower stratosphere is actually recovering faster than the Montreal Protocol alone can explain." From the article: "It's a complicated question. CFCs are not the only things that can influence the ozone layer; sunspots, volcanoes and weather also play a role. Ultraviolet rays from sunspots boost the ozone layer, while sulfurous gases emitted by some volcanoes can weaken it. Cold air in the stratosphere can either weaken or boost the ozone layer, depending on altitude and latitude. These processes and others are laid out in a review just published in the May 4th issue of Nature: 'The search for signs of recovery of the ozone layer' by Elizabeth Westhead and Signe Andersen."





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wtwt5237

I think ozone depletion is not caused by man-made chemical compounds alone.Just like global warming, it has something to do with the natural changes in the atmosphere. Something like sunspot cycle may also contribute to flunctuation in ozone layer intensity. But they just may,and I am afraid that volcanic eruptions will by no means affect ozone layer on a large scale.

I am going to participate in the ozone quizz competition to be held in Bangkok. Hope to hear more about ozone .