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Arctic temperatures and Arctic ice extent varies in a very predictable 60-70 year cycle, explains meteorologist.
According to this article on CNN, the amount of Arctic sea ice has melted to a historic low, with the area of land covered by ice at the smallest level since scientists began observing it with satellites in 1972. This information came from researchers at the University of Bremen in Germany.
“It seems to be clear that this is a further consequence of the man-made global warming with global consequences,” the article continues. (So much for unbiased reporting.)
“So who is telling the truth?” asks reader Thomas O’Hara. “I have never understood the glass is half full versus the glass is half empty. Either there is less ice or more ice. Which is it, really?”
“How can someone look at the same thing, seeing the same numbers, and come up with a completely different explanation?” asks Thomas. “Either the ice is getting thicker and there is a greater need for ice breakers in the northern hemisphere, or the ice is getting thinner and we can sail tankers through to Prudhoe Bay without fear, but it can’t be both.”
(Thomas is referring to the fact that Sweden endured so much sea ice during the past two winters that they’ve recalled their largest icebreaker from the Antarctic.)
Other than the fact that the media likes to scream about melting sea ice after a long, hot summer when the ice is – of course – at its lowest extent for the year, I think meteorologist Joe D’Aleo explains it the best.
“Temperatures in the arctic have indeed risen in recent years and ice has declined, bottoming out in 2007 but it is not unprecedented nor unexpected.” says D’Aleo.
But is this a consequence of man-made global warming? No. It’s part of a natural cycle.
“The arctic temperatures and arctic ice extent varies in a very predictable 60-70 year cycle that relates to ocean cycles which are likely driven by solar changes,” says D’Aleo.
“In 2007, NASA scientists reported that after years of research, their team had assembled data showing that normal, decade-long changes in Arctic Ocean currents driven by a circulation known as the Arctic Oscillation was largely responsible for the major Arctic climate shifts observed over the past several years.”
So there you go, Thomas. Yes, the ice has been melting. But are humans to blame? No.
I think we’ll see the Sweden experience of the past two winters being repeated in more and more areas in the coming years.
See entire article by meteorologist Joe D’Aleo:
“Arctic Temperatures and Ice – Why it is All About Natural Variability”
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A publisher in Italy has translated
Not by Fire but by Ice into Italian.
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