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Calgary Herald Debate: Is Hot Air natural?

mannetalscience09
Hot air
BY BRENDAN FRANK, CALGARY HERALD JUNE 30, 2011
 
Re: "Natural warming," Letter, June 27.

Taking a case study on Greenland's climate and trying to extrapolate it into a diatribe on global warming is both preposterous and ignorant. CO2 is not the only greenhouse gas, nor is it the most common. The fact that Greenland was actually green 1,000 years ago has many possible explanations.

Also, whether or not humans are contributing to the acceleration of our planet's current warming cycle is not in dispute; the extent to which we are contributing is.

Brendan Frank, Calgary

© Copyright (c) The Calgary Herald

Schweinsgruber says: You are right, Brendan. Here is the paper that demonstrates that the greening of Greenland was a local event. And here is our own discussion of the regional vs. global issue. And here is an independent evaluation by pub climatologists.


wikingerkopf
Natural warming
BY BEN CHANDLER, CALGARY HERALD JUNE 27, 2011
 
Re: "Climate change hurt Norse settlements," June 24.

Who was cranking out the CO2 that made Greenland so toasty around 985 AD?
Seems the warming periods have been happening long before the industrial age with its fossil fuel use.

If anything, it would cause us to question whether any trend is continuous over many centuries, let alone tied to man-made causes. The fluctuations over history don't make much of a "hockey stick."

Ben Chandler, Calgary

© Copyright (c) The Calgary Herald

Schweinsgruber says: Ben, the only people that are old enough to have experienced the hotness in Greenland are our zombie friends of the Friends of Science. Their cottages along Greenland’s shoreline can be found under a thick ice sheet that started to form after the inception of global cooling in 2003.