“As that sea ice moves northward, there’s a huge reservoir of heat over the North Atlantic,” Mr. Moore said. “As we lose the sea ice, it allows essentially this reservoir of warmth to move closer to the pole.”
When this happens, storm systems may be able to carry heat farther north than usual. In fact, earlier last week, scientists at the National Snow and Ice Data Center announced that sea ice remained at record low daily extents through the month of January. Sea ice extent for the month averaged 5.17 million square miles, the lowest January extent on record. . . Mr. Moore noted that weather-induced warming events in the Arctic tend to be short-lived, meaning last week’s event — like similar others in the past — will probably not persist for more than a few days. But he added that an increase in the frequency of temperature extremes at the North Pole is just another indicator of climate change’s disproportionate effect on the Arctic.