In the 1970's, Bill Cosby posed the question "Why is there air?" and concluded that it was so one could blow up basket balls. A more timely question is "Why is there ice?"
The mean temperature of the Earth is somewhere between 5 and 19 degrees Celsius, depending on whose data is used. Since this entire range is well above the freezing temperature of water, then it is evident that without the spatial variation of temperature across the globe, Earth would not support the existence of water.
More importantly, if the spatial variation of temperature were reduced, i.e., there existed sufficient atmospheric mixing and/or changes in ocean currents then the polar ice would melt. This would not require any increase in mean temperature, no global warming, no greenhouse effect.
One consequence of this observation is that the melting of polar ice must be discounted as an indicator of global warming since other mechanisms exist that could be responsible.
2007-08-14
05:31:54
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10 answers
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asked by
Dr.T
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in
Global Warming