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Originally posted by traderonwallst
Any thought on my theory?
On August 2, 2003, scientists announced that the depletion of the ozone layer may be slowing down due to the international ban on CFCs. Three satellites and three ground stations confirmed that the upper atmosphere ozone depletion rate has slowed down significantly during the past decade. The study was organized by the American Geophysical Union. Some breakdown can be expected to continue due to CFCs used by nations which have not banned them, and due to gases which are already in the stratosphere. CFCs have very long atmospheric lifetimes, ranging from 50 to over 100 years, so the final recovery of the ozone layer is expected to require several lifetimes.
The level of solar activity during the past 70 years is exceptional - the last period of similar magnitude occurred over 8,000 years ago. The Sun was at a similarly high level of magnetic activity for only ~10% of the past 11,400 years, and almost all of the earlier high-activity periods were shorter than the present episode.
Originally posted by Animal
Interesting to bring up the Ozone Holes and Global Warming together. You see the ozone hole is known to be a man-made negative impact on the planets systems. The release of CFCs caused the depletion of ozone which led to the opening of ozone holes.
Most people who don't want to believe in the anthropogenic causes of global warming don't like to talk about the ozone hole. Because we isolated what chemicals led to the depletion of the ozone and the creation of these holes we banded together, and in a effort led primarily by the US humans drastically decreased the use of CFCs and as a result have seen the ozone holes begin to repair themselves.
The ozone holes were first discovered in 1985. NASA/NOAA have data that show levels of ozone beginning to repair / replenish themselves in 1997. I am sure some people would say that this is a natural cycle and our termination of CFC chemicals had nothing to do with the improvements. I say hooey.
Check out this site The Ozone Hole it has some basic background information on the ozone hole and a NASA/NOAA graph showing the decline and increase in ozone.
In regards to global warming, surely it exists. I for one believe that humans play a major roll in it as well. That is not to say we are the only factor, but the amounts of carbon, methane, and other chemicals we release into the atmosphere is huge. As has been seen with the ozone hole, the wastes we produce can be highly damaging to natural systems so ignoring how they impact these systems and not taking the appropriate action to mitigate our impacts is willful disregard for our planet.
The degree to which humans are the cause of this problem is not for me to state in certain terms, however I do believe we are the major cause of it today. I do understand the natural cycles of warming and cooling on this planet, but I don't think the changes we have been seeing are the work of natural cycles alone. The speed and intensity of natural system changes leads me to believe that once again our actions are causing trouble that will need to be addressed.
Originally posted by traderonwallst
The hole in the ozone layer is man made? You better cite that one. Scientists claim that ozone depletion is a man driven event, but I have never seen a claim that the hole in the ozone layer is man made. I feel the hole has always been there, but we were never able to detect it until our technology advnced.
People disagree...you say hooey. Nice arguement. First off, the hole in the ozone layer was first discovered way before that, they just did not know what they found. They originally blamed it on faulty equipment and bad readings, I believe that was back before 1920. I say hooey to you. Who is not to say that that the fix did not occur naturally, or do the actions taken by the earth itself. We truly live on an amazing planet and its has been taking acre of itself for millions of years without our help.
If you truly understood the natural cycles of warming and cooling, you would not be so adament that global warming exists.