The evidence is wherever they look. John Merline writes:
[J]ust a few years ago, climate scientists were insisting that a warming climate would cause water levels to decline. [...]
Since the Great Lakes account for 21% of the world’s surface fresh water, these stories were all wrapped in doom-and-gloom scenarios about the impact on drinking water, shipping, recreation, and so on.
The very next year, however, water levels started rising.
So what are scientists saying now? Simple. They’re now claiming that the fall and rise of Great Lakes’ water levels are due to climate change.
“Climate change is driving rapid shifts between high and low water levels on the Great Lakes,” is the new “consensus.”
The truth, of course, is that water levels in the Great Lakes vary over time. And, as a matter of fact, they varied far more in the past than they do now. A U.S. Geological Survey notes that “prehistoric levels exceed modern-day fluctuations.”
It says that “Prehistoric variations in lake levels have exceeded by as much as a factor of 2 (that is, more than 3 meters) the 1.6-meter fluctuation that spanned the 1964 low level and the 1985-87 high level.” [...]
So if the lakes’ huge fluctuations in the past weren’t caused by mankind’s burning fossil fuels, why are scientists so convinced that the far more minor changes happening today are?
The reason is simple. Climate scientists can blame anything they want on global warming. The climate models are imprecise enough that no matter what is happening they can point to it as proof that man-made climate change is happening.
[John Merline, “Great Lakes Reveal a Fatal Flaw in Climate Change ‘Science’,” Issues and Insights, June 9]
