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Ozone layer heals as humans stay indoors amid coronavirus outbreak
Thursday, March 26, 2020 IST
Ozone layer heals as humans stay indoors amid coronavirus outbreak

New Delhi : The Ozone layer above Antarctica has registered a significant recovery as it healed to create a positive global wind movement.

 
 

A new study suggests the Montreal Protocol - the 1987 agreement to stop producing ozone depleting substances (ODSs) - could be responsible for pausing, or even reversing, some troubling changes in air currents around the Southern Hemisphere.
 
The study has been published in Nature.
 
Adding to it is massive suspension of industrial operation across the globe, resulting in less pollution and better environment need.
 
Our planet swirls faster at the high altitudes near poles, resulting in fast air currents, also referred as jet streams. Before the turn of the century, ozone depletion had been driving the southern jet stream further south than usual. This ended up changing rainfall patterns, and potentially ocean currents as well.
 
Nearly a decade ago, the world agreed upon a protocol and the results are significant. 
 
In other words, the impact of the Montreal Protocol appears to have paused, or even slightly reversed, the southern migration of the jet stream. And for once, that's actually good news.
 
To put the picture in perspective, Australia was on the verge of facing draught like situation as the rainfalls had started shifting away from the coastal areas. If the trend does reverse, those rains might return.
 
"The 'weather bands' that bring our cold fronts have been narrowing towards the south pole, and that's why southern Australia has experienced decreasing rainfall over the last thirty years or so," says Ian Rae, organic chemist from the University of Melbourne who was not involved in the study.
 
"If the ozone layer is recovering, and the circulation is moving north, that's good news on two fronts (pun not intended)."
 
Well, there is not much to cheer about it as the carbon dioxide emission has been massive and increasing and when the operations resumes, the things will start to deplenish.
 
"We term this a 'pause' because the poleward circulation trends might resume, stay flat, or reverse," says atmospheric chemist Antara Banerjee from the University of Colorado Boulder.
 
"It's the tug of war between the opposing effects of ozone recovery and rising greenhouse gases that will determine future trends."
 
The Montreal Protocol is proof that if we take global and immediate action we can help pause or even reverse some of the damage we've started. Yet even now, the steady rise in greenhouse gas emissions is a reminder that one such action is simply not enough.

 
 
 
 
 

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Shibu Chandran
2 hours ago

Serving political interests in another person's illness is the lowest form of human value. A 70+ y old lady has cancer.

November 28, 2016 05:00 IST
Shibu Chandran
2 hours ago

Serving political interests in another person's illness is the lowest form of human value. A 70+ y old lady has cancer.

November 28, 2016 05:00 IST
Shibu Chandran
2 hours ago

Serving political interests in another person's illness is the lowest form of human value. A 70+ y old lady has cancer.

November 28, 2016 05:00 IST
Shibu Chandran
2 hours ago

Serving political interests in another person's illness is the lowest form of human value. A 70+ y old lady has cancer.

November 28, 2016 05:00 IST


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