The mechanism for Arctic cold air outbreaks into Eurasia

It is a reliable occurrence now: every time we have a cold event here in the United States, two public conversations begin, both of which deploy the term "polar vortex." Those who are suspicious of the reality of climate ...

Polar vortex: The science behind the cold

The polar vortex, a swirl of low-pressure air six miles up in the atmosphere, blasted much of the American Midwest and Northeast in late January 2019 with temperatures cold enough to bring on frostbite within minutes.

How frigid polar vortex blasts are connected to global warming

A record-breaking cold wave is sending literal shivers down the spines of millions of Americans. Temperatures across the upper Midwest are forecast to fall an astonishing 50 degrees Fahrenheit (28 degrees Celsius) below normal ...

Warming in the stratosphere leads to cold winters

In the first week of January, the Arctic stratosphere suddenly warmed up, an occurrence known as "sudden stratospheric warming" (SSW). This phenomenon results in cold winter weather, just the kind we are facing now – ETH ...

Record-breaking cold coming to Midwest after snowstorm

Extremely cold, record-breaking temperatures are settling across parts of the Midwest after a powerful snowstorm pounded the region overnight Monday, and forecasters are describing the subzero weather on the way as potentially ...

Aeolus wows with first wind data

Just one week after ESA's Aeolus satellite shone a light on our atmosphere and returned a taster of what's in store, this ground-breaking mission has again exceeded all expectations by delivering its first data on wind – ...

Saturn's famous hexagon may tower above the clouds

The long-lived international Cassini mission has revealed a surprising feature emerging at Saturn's northern pole as it nears summertime: a warming, high-altitude vortex with a hexagonal shape, akin to the famous hexagon ...

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