Since we are in (deeply in) one of the 20 or so interglaciations which have occurred regularly over the last couple of million years, and coming out of a mini ice age (which followed the Maunder and Dalton Minimums), it is not surprising that the glaciers which covered all of Canada and a lot of the Rocky Mountains (and New York City) just 12,000 years ago, are continuing to shrink. Nor is it any evidence of
Global Warming Climate Change caused primarily from anthropogenic greenhouse gasses (mainly CO2). A rooster may make a lot of noise just before the sun rises (or seems to) each morning, but that doesn't mean the rooster causes the sunrise.
Just so, there are indeed higher concentrations of atmospheric CO2 over the last century and almost certainly warming of just over a degree and a half F during that same period, but that doesn't mean CO2 is causing
the warming (although only a fool would deny that it contributes some little bit). The Vostok ice core record
indicates that CO2 follows
a rise in temperature over the last 400,000 years. No reason to believe it isn't the same now.
Because the climate and daily weather are more complex than we can yet begin to understand, we can barely predict what the weather will be like a month from now. Evidence of this complexity is the fact that, despite the warming, all the glaciers on Mount Shasta in Northern California have been growing
. Who predicted that 20 years ago? Anyone? Anyone? Bueller?
No one is the true answer.
Labels: Global Warming; Disputed Predictions; Glaciers