Dear friends,
I am really confused with CFC role in destruction of ozone umbrella. is their any scientific evidence supports cfc moves upto ozone layer and destruct them.
Please share the papers confirming your answer...
Yes, CFC produces hole in ozone umbrella. Please take a look at the following references.
Article Ozone Layer Depletion and Its Effects: A Review
Article Depletion of the Ozone Layer and Its Consequences: A Review
Article CFC Destruction of Ozone - Major Cause of Recent Global Warming
Article mechanism of ozone destruction and its environmental Impact
Article Ozone Hole and its Healing
yes, there is plenty of evidence and the processes are well understood.
Yes, CFC produces hole in ozone umbrella. Please take a look at the following references.
Article Ozone Layer Depletion and Its Effects: A Review
Article Depletion of the Ozone Layer and Its Consequences: A Review
Article CFC Destruction of Ozone - Major Cause of Recent Global Warming
Article mechanism of ozone destruction and its environmental Impact
Article Ozone Hole and its Healing
Old refrigerators, cars and fire extinguishers are preventing the ozone hole over the Antarctic from closing as quickly as scientists originally estimated. New results suggest that the hole will not disappear completely until 2065 - 15 years later than previous estimates.
Ozone occurs naturally in the upper atmosphere and helps to mop up ultraviolet radiation. In 1985 scientists discovered a gaping hole in the ozone layer over the South Pole. The weakening of this protective umbrella has had direct implications, such as a large increase in skin cancer in Australia.Scientists established that the hole was caused by a chemical reaction between ozone and manmade chemicals such as chlorofluorocarbons (CFCs).
Please check the link below:
https://www.theguardian.com/environment/2005/dec/08/science.climatechange
The ozone layer above Earth can be compared to an umbrella which protects us from the rain. But there’s a hole in the umbrella, and we are slowly but surely getting wet. At first it’s just a little, then more and more until at some point we will be completely in the rain. The ozone layer exists between 14 and 35 kilometers above our planet. It’s our shield against the sun’s very high energy and ultraviolet rays. If these rays struck Earth unprotected, no life would be possible on the planet. They are so strong that even microorganisms would be killed.
This ozone layer is vital to us, but it’s becoming increasingly thinner. Scientists and researchers have been observing this for decades. And the blame lies squarely with us. One of the main destructive factors of the ozone layer is the substances known as chlorofluorocarbons (CFCs). For years this harmful gas was pumped into the atmosphere without anyone knowing how destructive it was. CFCs have long been in use in refrigerator coolants and aerosol propellants. When these gases rise into the atmosphere, their molecules mix with the ozone layer and attack it, until it is slowly destroyed.
Please see the attached link:
https://www.lufft.com/blog/en/the-ozone-hole-and-its-impact-on-earth/
Over the Earth's surface, the ozone layer's average thickness is about 300 Dobson Units or a layer that is 3 millimeters thick. Ozone in the atmosphere isn't all packed into a single layer at a certain altitude above the Earth's surface; it's dispersed.
https://www.google.co.in/search?source=hp&ei=4JB3XPL6LpP1rQH5k6i4Cg&q=ozone+layer+thickness&oq=Ozone+layer+thickness&gs_l=psy-ab.1.0.0l7j0i22i30l3.2807.14123..16201...0.0..0.347.5407.0j3j9j9......0....1..gws-wiz.....0..0i131.idSX3QaG9Ow
So thickness is just 3 mm and this layer saves us!!!
Mario Molina has received numerous awards and honors, including sharing the 1995 Nobel Prize in chemistry with Paul J. Crutzen and F. Sherwood Rowland for their discovery of the role of CFCs in ozone depletion.
https://www.google.co.in/search?ei=8ZB3XNDiFZb4rQHuy4TQDQ&q=who+got+the+Nobel+prize+for+first+inventing+that+CFC+causes+whole+in+ozone+layer&oq=who+got+the+Nobel+prize+for+first+inventing+that+CFC+causes+whole+in+ozone+layer&gs_l=psy-ab.12...1303566.1342599..1344403...0.0..0.372.20397.0j23j21j36......0....1..gws-wiz.......0i71j0i67j0i131i67j0i131j0j0i3j0i22i30j33i22i29i30j33i10j33i160j33i21j33i10i21.tiBzdNAt_mk
Initially many were reluctant to accept it.
Yes, especially if you are north of 50 degrees latitude south and to a somewhat lesser extent if you are south of about 60 degrees north, especially in late winter and spring. The 'hole' is most evident inside the Antarctic vortex, but similar amounts of loss have been observed in some Arctic winters too./
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