polar vortex


The jet stream and polar vortex on January 3, 2017. Map from the University of Maine Climate Change Institute.

The Polar Vortex, Winter Storm Grayson, and Climate Change: What’s the Connection?

, senior climate scientist

Forecasters are trotting out “polar vortex” and atypical terms like “Nor’easter bomb” and “bombogenesis.” These words signal the unusual and dangerous conditions forecast for winter storm Grayson and their implications for the Southeast US,  Mid-Atlantic, and eventually New England and beyond. What do they mean?   Read more >

University of Maine Climate Change Institute
University of Maine Climate Change Institute
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El Niño vs. the Arctic: Which Will Dominate This Year’s Winter Weather?

, senior climate scientist

This past week, the American Geophysical Union (AGU) 2015 annual meeting was abuzz with discussion of El Niño 3.4 and the Arctic Oscillation. No wonder. These indicators are clues to how major competing factors may play out this winter in the northern hemisphere. Read more >

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It’s Cold Out But it’s Not the Polar Vortex

, , former scientist and Kendall Science Fellow

The “polar vortex” is synonymous with cold air blasts for Americans. But is it correct to equate polar air with the polar vortex? The answer is no. Read more >

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The Bering Sea Bomb and the Polar Vortex in our Warming World

, , former scientist and Kendall Science Fellow

A historic storm occurred over Alaska this past weekend as typhoon Nuri merged with an extra tropical system and became a perfect storm. With it also came the chance for more extreme weather for the United States in the form of a small polar vortex event that flooded much of eastern North America with frigid temperatures. But how can we have such cold outbreaks in our warming world? Read more >

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