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| OZONE HOLE@30 |
This week British Antarctic Survey (BAS) commemorates the 30th anniversary of one of its most dramatic scientific discoveries: the ozone hole. In May 1985 reporting in Nature, Joe Farman, Brian Gardiner and Jonathan Shanklin described their observations of large losses of ozone over Antarctica.
The discovery of the ozone hole alerted the world to the dramatic and major environmental threat. The accumulation of chlorofluorocarbons (CFCs) used in refrigeration and air conditioning systems, and industrial solvents were found to deplete the protective layer of ozone that surrounds the Earth.
Montreal Protocol of 1987 ensured that production and consumption of CFCs will be phased out by 2000, and methyl chloroform by 2005. All UN states have now signed the Montreal Protocol. Today, scientists predict that Antarctic ozone levels will return to their 1950s levels by about 2080.
Link: https://andyrussell.wordpress.com
Montreal Protocol of 1987 ensured that production and consumption of CFCs will be phased out by 2000, and methyl chloroform by 2005. All UN states have now signed the Montreal Protocol. Today, scientists predict that Antarctic ozone levels will return to their 1950s levels by about 2080.
Link: https://andyrussell.wordpress.com
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