Jet stream shift could prompt harsher winters: scientists




 
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Jet stream shift could prompt harsher winters: scientists
 
February 17th, 2014  
News Manager
 

Topic: Jet stream shift could prompt harsher winters: scientists


Jet stream shift could prompt harsher winters: scientists
A warmer Arctic could permanently affect the pattern of the high-altitude polar jet stream, resulting in longer and colder winters over North America and northern Europe, US scientists say. The jet stream, a ribbon of high altitude, high-speed wind in northern latitudes that blows from west to east, is formed when the cold Arctic air clashes with warmer air from further south. According to Jennifer Francis, a climate expert at Rutgers University, the Arctic air has warmed in recent years as a result of melting polar ice caps, meaning there is now less of a difference in temperatures when it hits air from lower latitudes. "The jet stream is a very fast moving river of air over our head," she said Saturday at a meeting of the American Association for the Advancement of Science.




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