Originally posted by: shira
Originally posted by: CADsortaGUY
Originally posted by: shira
Originally posted by: Crimson
You must believe that global temperatures are less affected by cyclical, documented changes in the earth's climate, and more affected by yuppies driving SUV's.
This statement is nonsense, but it's obvious how a limited intellect might find it meaningful.
The temperature of the earth is approximately 500 degrees Kelvin. Let us say that "natural" temperature variation across the millenia is +/- 20 degrees for any given region. At it's worst, a 20 degree variation might make, say, Los Angeles barely habitable, or might create wintery conditions in the higher US latititudes, say, 9 months out of the year.
But if human activities were to add, say, only another 10 degrees of variation over the next two hundred years, that additional variation might put us "over the top". Maybe L.A. would become completely uninhabitable, or perhaps northern latitudes in the U.S. might be in continuous wintery conditions ("climate change" can raise AND lower temperatures).
So you see, it isn't whether human behavior has "more" of an affect than the natural world. It's that the affects
can be addititive, and the additional effects caused by mankind
may be catastrophic.
And? Can you show these "additive" effects? Quantify them? Even conclusively identify them?
What say you about the global cooling bleaters? Seems that used to be the environut chant of yesteryear...
CsG
Apparently your reading comprehension is limited, so I've bolded important portions of the posts which preceded yours to aid in your understanding.
Crimson cited the bolded statement and indicated he thinks it's appropo. I've refuted the quotation but showing how it's possible that human contributions to climate change can be less than natural variations yet still be the deciding factor in catastrophic climate change. That, in turn, demonstrates how one does not "have to believe" human contributions are greater than natural variations.
In logic or science, one disproves a statement or theory by providing a counterexample. I've provided a counterexample to Crimson's claim - my sole intention, and have therefore demonstrated that the statement was nonsense. The only assumptions that my counterexample depends on are (1) that it's
possible for human contributions to add to natural variation, and (2) that it's
possible that these marginal contributions could put climate "over the top". Hence my use of the words "can" and "may", rather than "are" and "will".
Now, if you want to argue that it is NOT possble for human behavior to add to natural variations, or that marginal contributions cannot be decisive, you can certainly try. But I think you're facing a huge hurdle.
Your actual question (to have me provide specific information on addititive contributions by humans) is completely irrelevant to my argument. But then, you aren't very logical, so what could I have expected.