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A #TALE OF TWO CITIES - #ECONOMICS AND #SCIENCE COLLIDE

  SURREAL ECONOMICS OR CONCRETE SCIENCE? ORIGINAL POST It  was the best of times, it was the worst of times, it was the age of wisdom, it wa...

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Tuesday 3 May 2016

Jet Stream Dominoes of #Melting Ice

  

CLIMATE NEWS


 Iceberg, with Mount Dundas in the background, Qaasuitsup, west Greenland, Denmark. 



Dominoes fall: Vanishing Arctic ice shifts jet stream, which melts Greenland glaciers

Investigating the factors affecting ice melt in Greenland — one of the most rapidly changing places on Earth — is a major priority for climate scientists. And new research is revealing that there are a more complex set of variables affecting the ice sheet than experts had imagined. A recent set of scientific papers have proposed a critical connection between sharp declines in Arctic sea ice and changes in the atmosphere, which they say are not only affecting ice melt in Greenland, but also weather patterns all over the North Atlantic.
The new studies center on an atmospheric phenomenon known as “blocking” — this is when high pressure systems remain stationary in one place for long periods of time (days or even weeks), causing weather conditions to stay relatively stable for as long as the block remains in place. They can occur when there’s a change or disturbance in the jet stream, causing the flow of air in the atmosphere to form a kind of eddy, said Jennifer Francis, a research professor and climate expert at Rutgers University.
Blocking events over Greenland are particularly interesting to climate scientists because of their potential to drive temperatures up and increase melting on the ice sheet. 

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