Postponement of the first ice-free summer in the Arctic – Earth and the Pole

the Montreal Protocol Developed in 1987 to maintain Ozone Layer Also contributed to slows down global warming, delay more than a decade fucking The first ice-free summer in the ArcticIt was initially planned for the middle of this century. This is indicated by simulations conducted by experts from the University of California, Santa Cruz and Columbia University in the US together with colleagues from the University of Exeter in the UK. Results published In the Journal of the American Academy of Sciences (PNAS).

Considered one of the greatest achievements of climate diplomacy, the Montreal Protocol was the first treaty ratified by all 198 member states of the United Nations: it entered into force in January 1989subject to the deadlines by which the signatories adhered It contains production and consumption levels of a hundred items Chemicals harmful to the ozone layer (ozone-depleting substances, ozone-depleting substances).

“Although ozone-depleting substances are not as abundant as other greenhouse gases such as carbon dioxide, they still have a real impact on global warming,” says Mark England of the University of Exeter. “Ozone-depleting substances have particularly strong effects on the Arctic and played a major role in driving climate change in the Arctic in the second half of the 20th century. While halting these effects was not the primary goal of the Montreal Protocol, it was a fascinating secondary effect.” Researchers estimate that every 1,000 tons of ozone-depleting substances not emitted into the atmosphere saves seven square kilometers of Arctic sea ice.

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Our results clearly show that the Montreal Protocol was A very strong climate treaty “It has done much more than just cure the ozone hole over the Antarctic. Its effects have been felt all over the world, especially in the Arctic,” adds Lorenzo Polfani of Columbia University.

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