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Ozone hole still needs over 50 years to heal

RATE THIS! +23
Posted in Science on 27th Dec, 2013 12:40 AM by AlexMuller

Back in the 1980’s, we weren't in the least concerned about spraying hairsprays, paints, and other chlorofluorocarbons (CFCs) in the atmosphere. Then scientists discovered something shocking: the ozone layer above Earth had a hole in it, and it was there because of all those CFCs.

 

Fortunately, a worldwide ban on CFCs was put in place in 1989, but the damage was done: it would take decades for the ozone to heal. Unfortunately, according to a group of scientists at NASA’s Goddard Space Flight Center, that hole won’t complete healing until at least 2070.

 
The Earth’s ozone layer is important because it filters out much of the sun’s harmful UV radiation. Without it, we humans would fry. Having a large hole in the ozone layer, mostly above Antarctica, is a very bad thing. Even after banning CFCs, we have only seen small improvements in its healing process. Of course, this might be because the healing has been so small from year to year and the size of the hole was initially underestimated. Scientists also believe that the hole over Antarctica is also affected by winds and temperature.
 
There is good news, though: scientists expect to see substantial evidence of the ozone healing in around 10 years, and it might even heal faster than expected. Although, scientists initially estimated that chlorine levels in the ozone hole would decrease about 5 percent in the next 10 years, they’re noticing lower levels at about 5 percent per year instead. Once those levels continue to drop, the hole should begin shrinking in size.
 
This news shows that with even small changes, like banning certain substancesand activities, we can reverse some of the damage we have inflicted upon the planet. It also shows that the planet is much more resilient than we thought.

Tags: ozoneozone layeratmosphereenvironmentUVCFCspollutionNASA

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Comments

Author: Guest
Posted: 2013-12-27
+2
It is important to note that damage made to ozone layer can be repaired and we should take advantage of this and act quickly to restore what can be restored
2 Replies
Author: Guest
Posted: 2013-12-27
+1
I agree. We should not overlook that this report is a good news. NASA scientists are predicting that the hole in the ozone layer might finally make a full recovery Reply
Author: Guest
Posted: 2013-12-27
+0
Any achievement will only come with further big efforts. No one expects this to be a smooth ride. There will be some bumps in the road, but overall the trend is positive Reply
Reply
Author: Guest
Posted: 2013-12-27
+1
Yes, recently NASA scientists presented their research to show that the hole in the ozone layer is stabilizing but will take until about 2070 to fully recover
3 Replies
Author: Guest
Posted: 2013-12-27
+1
Global temperature is the ultimate parameter. In addition to CFSs , other contributors to the rise in global temperatures have to be considered - these include increases in China's use of coal, changes in solar output, and the impact of the El Nino weather cycle Reply
Reply
Author: Guest
Posted: 2013-12-27
+1
NASA has been measuring the size and shape of the ozone hole each year from 1979. What is interesting is that actually there is no hole as such -the word describes the area in which ozone concentrations drop below a given threshold Reply
Author: Guest
Posted: 2013-12-27
+1
The importance of the ozone layer is undisputed. It is Earth’s natural sunscreen protects life on Earth by absorbing ultraviolet light, which damages DNA in plants and animals and leads to skin cancer- preserving it is vital!
2 Replies
Author: Guest
Posted: 2013-12-27
+0
Evidence is strong that CFC gases are responsible for a massive hole in the ozone layer and at least some efforts to reduce the use seem to be in place Reply
Reply


 

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