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NASA Studies an Unusual Arctic Warming Event

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Winter temperatures are soaring in the Arctic for the fourth winter in a row. The heat, accompanied by moist air, is entering the Arctic not only through the sector of the North Atlantic Ocean that lies between Greenland and Europe, as it has done in previous years, but is also coming from the North Pacific through the Bering Strait.
“We have seen winter warming events before, but they’re becoming more frequent and more intense,” said Alek Petty, a sea ice researcher at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.
Scientists are waiting to see how much this heat wave will impact the wintertime sea ice maximum extent, which has been shrinking in the past decades and has hit record lows each of the past three years. The sea ice levels are already at record lows or near-record lows in several areas of the Arctic. Another exceptional event this winter is the opening up of the sea ice cover north of Greenland, releasing heat from the ocean to the atmosphere and making the sea ice more vulnerable to further melting.
“This is a region where we have the thickest multi-year sea ice and expect it to not be mobile, to be resilient,” Petty said. “But now this ice is moving pretty quickly, pushed by strong southerly winds and probably affected by the warm temperatures, too.”
Credit: NASA’s Goddard Space Flight Center
Kathryn Mersmann (USRA): Lead Producer
Maria-Jose Vinas Garcia (Telophase Corp): Lead Writer
Alek A. Petty (University of Maryland): Scientist
Music: Crystal Light by Michael Holborn [PRS], William Henries [PRS]
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