Extract from The Guardian
The island community of Kodiak set the record on Sunday and scientists fear the population will be deluged with rain as climate warms.
Boys cross a flooded walkway in Newtok, Alaska, a village which is sinking as a result of warming weather.
The new benchmark high came amid a spate of balmy December extremes, Thoman said, including 18.3C (65F) at the Kodiak airport, a record 16.6C (62F) at the Alaska Peninsula community of Cold Bay and at least eight December days of temperatures above 10C (50F) at the Aleutian town of Unalaska, including a reading of 13.3C (56F) that was Alaska’s warmest Christmas Day on record.
The most serious immediate implication for humans is likely from the massive amounts of precipitation dumped on interior Alaska, where the Fairbanks area was hit by its fiercest mid-winter storm since 1937, Thoman said.
Normally, December is a dry month in interior Alaska because the usually frigid air cannot hold much moisture. Whatever moisture does flow in tends to be “the more fluffy powder because the air is nice and cold”, said Thoman, who lives in Fairbanks.
But so much snow fell that on Sunday it caved in the roof of the sole grocery store in Delta Junction, a town 95 miles (153km) south-east of Fairbanks.
Possibly worse, the heavy snows were followed by torrents of rain that coated communities in the region with ice, triggering widespread power outages and prompting closures of major roads and offices, as well as a nickname: Icemageddon.
The Alaska Department for Transportation warned that roads will remain treacherous for a long time because of the cement-like ice coating that has formed on them.
“Ice is extremely difficult to remove once it has binded to the road surface. Even though air temps were warm during ‘icemageddon2021’, roads were at sub-zero temps, which caused ice to bind to the surface,” the department said on Twitter.
The blasts of warm and wet mid-winter weather have become more frequent in Alaska over the past two decades than in years prior, a sign of climate change, Thoman said. “This is exactly what we expect in a warming world,” he said.
A study published last month in the journal Nature Communications projected an Arctic climate with more winter rain than snow starting around 2060 or 2070.
Alaska will still have its winter cold – Fairbanks temperatures were forecast to plunge below minus -29C (-20F) this weekend – but warm, soggy episodes are expected to be more numerous in the future, Thoman said.
“A warming, moistening world has put our thumbs on the scale to make this more likely,” he added.
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