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PART 1
For nearly a billion years, ozone molecules in the atmosphere have protected life on Earth from the effects of ultraviolet rays.
The ozone layer resides in the stratosphere and surrounds the entire Earth. UV-B radiation (280- to 315- nanometer (nm) wavelength) from the Sun is partially absorbed in this layer. As a result, the amount of UV-B reaching Earth’s surface is greatly reduced. UV-A (315- to 400-nm wavelength) and other solar radiation are not strongly absorbed by the ozone layer. Human exposure to UV-B increases the risk of skin cancer, cataracts, and a suppressed immune system. UV-B exposure can also damage terrestrial plant life, single cell organisms, and aquatic ecosystems.
Each spring in the stratosphere over Antarctica (Spring in the southern hemisphere is from September through November.), atmospheric ozone is rapidly destroyed by chemical processes.
As winter arrives, a vortex of winds develops around the pole and isolates the polar stratosphere. When temperatures drop below -78°C (-109°F), thin clouds form of ice, nitric acid, and sulphuric acid mixtures. Chemical reactions on the surfaces of ice crystals in the clouds release active forms of CFCs. Ozone depletion begins, and the ozone “hole” appears.
Over the course of two to three months, approximately 50% of the total column amount of ozone in the atmosphere disappears. At some levels, the losses approach 90%. This has come to be called the Antarctic ozone hole.
In spring, temperatures begin to rise, the ice evaporates, and the ozone layer starts to recover.
The Antarctic ozone hole was discovered in 1985 by British scientists Joesph Farman, Brian Gardiner, and Jonathan Shanklin of the British Antarctic Survey.
The ozone "hole" is really a reduction in concentrations of ozone high above the earth in the stratosphere. The ozone hole is defined geographically as the area wherein the total ozone amount is less than 220 Dobson Units. The ozone hole has steadily grown in size (up to 27 million sq. km.) and length of existence (from August through early December) over the past two decades.
After a series of rigorous meetings and negotiations, the Montreal Protocol on Substances that Deplete the Ozone Layer was finally agreed upon on 16 september 1987 at the Headquarters of the International Civil Aviation Organization in Montreal.
[atsimg]http://files.abovetopsecret.com/images/member/251273b4a9fb.jpg[/atsimg]
NASA/NOAA satellite data showing the rise in stratospheric chlorine and corresponding decline in ozone layer thickness from 1979 to 1997. As stratospheric chlorine declined in response to enactment of the Montreal Protocol, the first stage of ozone recovery began.
Now, the ozone has obviously been changing over years, to depict this and explain it I will use a picture and some info from ozonehole.com.
The Montreal Protocol stipulates that the production and consumption of compounds that deplete ozone in the stratosphere--chlorofluorocarbons (CFCs), halons, carbon tetrachloride, and methyl chloroform--are to be phased out by 2000 (2005 for methyl chloroform). Scientific theory and evidence suggest that, once emitted to the atmosphere, these compounds could significantly deplete the stratospheric ozone layer that shields the planet from damaging UV-B radiation.
Man-made chlorines, primarily chloroflourobcarbons (CFCs), contribute to the thinning of the ozone layer and allow larger quantities of harmful ultraviolet rays to reach the earth.
[atsimg]http://files.abovetopsecret.com/images/member/c1f152e5285a.gif[/atsimg]
This next picture shows the changes in the ozone from 1980-2004
[atsimg]http://files.abovetopsecret.com/images/member/96f4714af749.gif[/atsimg]
The graph above compares ozone changes between 1980 and 2004 for different latitudes. The largest decreases have occurred at the highest latitudes in both hemispheres because of the large winter/spring depletion in polar regions. The losses in the Southern Hemisphere are greater than those in the Northern Hemisphere because of the Antarctic ozone hole. Long-term changes in the tropics are much smaller because reactive halogen gases are less abundant in the tropical lower stratosphere.
This animated picture shows the ozone hole over time (starting from years back and never ends because it keeps going until the present time)
[atsimg]http://files.abovetopsecret.com/images/member/3bb8b7aefbab.gif[/atsimg]
"Ozone Hole 2009: The Antarctica Challenge - A Global Warning"(just an educational video explaining what climate change is doing to Antarctica, and yes I know this is a tiny bit off topic but it does relate, if you wish skip this but I'm sure some of you will find it interesting none the less)
All images and information taken from theozonehole.com and it's affiliates.
Part 2 continued in next post...
[edit on 28-2-2010 by highlyoriginal]
[edit on 28-2-2010 by highlyoriginal]
PART 2
Ozone Hole Consequences
What You Can Do
Data compiled from The British Antarctic Study, NASA, ESA, WDCRSA, Environment Canada, UNEP, NOAA, USEPA and other sources as stated and credited Updated Daily-Researched By Charles Welch- This Website is a project of the The Ozone Hole Inc. a 501(c)(3) Nonprofit OrganizationThe Ozone Hole P.O. Box 431 Pocono Pines, PA 18350
This website provides information on numerous environmental and world issues, such as solar energy, rainforests, coral reefs, ozone, global warming, endangered species, recycling, and things you can do to protect the environment. The term "Saving The Earth" is a misnomer.. The Earth will be just fine...It will adapt...just without all the people...
[edit on 28-2-2010 by highlyoriginal] *can someone please U2U me and explain how to make the pictures scrollable because the 2 that are cut off in this 2nd part are important and I'd like people to be able to see the entire image*
[edit on 28-2-2010 by highlyoriginal]
Originally posted by Chadwickus
As I pointed out in THIS thread, the Ozone layer has absolutely nothing to do with solar flares, CME's or solar storms.
Can you rectify this because as it stands it's blatant misinformation.
1859 solar flare, ozone depletion studied
March 22, 2007
U.S. scientists believe an 1859 solar flare destroyed more of the Earth's ozone than did a 1989 solar flare -- the strongest ever monitored by satellite.
Originally posted by Chadwickus
Sorry I should have been a bit clearer.
The ozone layer offers no protection to us from a solar storm.
I believe this is the gist of what this thread is about?
The hole in the ozone layer letting in particles from solar storms?
Originally posted by Chadwickus
As I pointed out in THIS thread, the Ozone layer has absolutely nothing to do with solar flares, CME's or solar storms.
Can you rectify this because as it stands it's blatant misinformation.
Originally posted by dainoyfb
It is extremely refreshing to see someone put so much effort to provide a quality presentation. Looks like you've been working on this for some time. Thanks for opening up this discussion and presenting your point of view. I'm sure this will be a lively thread which we will all learn a bit from. This is what ATS is all about, or should be anyway.
I hope you get some applause points from the mods for this.
My personal opinion about the topic in general is that despite whether or not we have caused an unnatural imbalance that will effect us negatively, we wont stop doing what we do until we have. So continued analysis of the data like this is paramount.
Originally posted by highlyoriginal
Originally posted by Chadwickus
As I pointed out in THIS thread, the Ozone layer has absolutely nothing to do with solar flares, CME's or solar storms.
Can you rectify this because as it stands it's blatant misinformation.
Really?
1859 solar flare, ozone depletion studied
March 22, 2007
U.S. scientists believe an 1859 solar flare destroyed more of the Earth's ozone than did a 1989 solar flare -- the strongest ever monitored by satellite.
Taken from physorg.com
the September 1859 solar proton event released 6.5 times more energy than did the 1989 event.
Models using that energy release showed 3.5 times more ozone was destroyed during the 1859 episode than in 1989.
a major solar flare directed towards the earth could completely destroy life as we know it sending us 'back into the dark ages'
Originally posted by Chadwickus
reply to post by highlyoriginal
Firstly, you posted some of this information in a 2012 thread. In that thread you addressed the speculation of the projected increase of solar storms in 2012, then went on about the ozone layer.
You then started this thread, again mentioning the solar storm projection.
This is why I jumped in, because at the time it seemed to me that you were deliberatly ignoring that you were mistaken.
Secondly, you've made mention that you want lot's of attention given to this thread.
Being honest here and without sounding too rude, all you have done is copy and paste pictures and text from a website. It's not that hard to do.