'Substantial’ Amount Of Arctic Warming Due To Natural Forces | 97% Can't be wrong, Can they? - Liar Liar!
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'Substantial’ Amount Of Arctic Warming Due To Natural Forces | 97% Can't be wrong, Can they?

'The natural variability is huge'

Scientists are now saying that natural climate forces account for a “substantial” amount of the region’s warming in the past three decades.

A new study found that natural forces could account for as much as half of Arctic warming.

“Rapid Arctic warming and sea-ice reduction in the Arctic Ocean are widely attributed to anthropogenic climate change,” write climate scientists from the U.S., Australia and South Korea in a study that suggests that a “substantial portion of recent warming in the northeastern Canada and Greenland sector of the Arctic arises from unforced natural variability.”

“Whenever you start to look at local climate trends, you have to look at the internal variability as well as the human-induced variability,” co-author Mike Wallace with the University of Washington told CTV News. “The natural variability is huge.”

Sea ice has declined 2.6 percent per decade on average since the late 1970s, reports CTV News, but the area north of Greenland and the Canadian archipelago has been warming more quickly due to rain and wind patterns in the South Pacific — not man-made carbon dioxide emissions.

“We find that the most prominent annual mean surface and tropospheric warming in the Arctic since 1979 has occurred in northeastern Canada and Greenland,” the authors wrote. “In this region, much of the year-to-year temperature variability is associated with the leading mode of large-scale circulation variability in the North Atlantic, namely, the North Atlantic Oscillation.”

But the researchers show that the increased warming is from a “negative trend in the North Atlantic Oscillation” is in response to “anomalous Rossby wave-train activity originating in the tropical Pacific.”

Wallace told CTV News that the increased warming in parts of the Arctic is due to unusually heavy rainfall in the South Pacific, which cause atmospheric turbulence around the globe.

 
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