Originally Posted by
stdreb27
http:///forum/post/3025396
Oh yeah, CFC's the molecule several times as heavy as air that somehow made it several miles in the air that had the ability to "dissolve" the ozone layer.
I'd ask you to please re-read my post. I never claimed that CFC's were what was spewed into the atmosphere initially. What I said was that the Sulphates created by catalytically converted car exhaust combined w/ Ozone and other compounds already extant in the upper atmosphere to create CFCs. The recombination creates the heavier than air CFC molecules, which then sink back to earth.
This is the same process that occurs during Volcanic eruptions. Volcanoes themselves do not produce CFC's, but reactions with both natural and man made chemicals in the the stratosphere/ionosphere do.
Slight note when thinking about heat, just something to consider. ...The sun...
Again, please go back and read my upthread posts. I have not then, nor do I now, discount the sun as a contributing factor. I have, in fact, posed the question what the extent of human influence is, given that Mars and Jupiter are also experiencing planetary warming despite human absence on those planets.
I contend that human influence is one of, but not the exclusive factor in the equation on this planet.
And I can go find reports where co2 levels are the same taken from actual air samples.
I'm sure you can. How many 200 year old air samples are you (or anyone else) in possession of?
The simple fact is as a whole we can't tell because we don't have large enough sample sizes. Which is my whole contention anyway.
In point of fact, we have no atmospheric samples at all.
Ice core samples however, provide reasonable, though not positive, data indicating what the current atmospheric content was. What I'm not convinced of is the dating process of those samples. I'm willing to concede a few thousand years one way or the other, however. Meanwhile, there is no debating what's contained within those samples.
Not to beat a dead horse but again, as I've stated upthread, I find the overall data to be inconclusive, but worthy of further investigation.