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Along Alaska's northern coastline, which lies above the Arctic Circle, the warmest December temperatures on record in at least 70 years occurred this past week.
The 2012 Arctic Report Card depicted a region undergoing rapid and pervasive changes related to manmade global warming, including the ramifications from plummeting spring and summer sea ice cover, melting permafrost, a rapid loss of spring snow cover, and various other climate change impacts.
At the Football Boots Jordans airport in Deadhorse, which serves the oil production hub of Prudhoe Bay, the temperature hit 39F on December 7, the highest December temperature on record there since at least 1968, said Rick Thoman of the National Weather Service (NWS) in Fairbanks in an interview. Even more notable, perhaps, was the fact that it was raining, rather than snowing. Rain there is unusual so late in the year.
wavy or "amplified" jet stream patterns, with large ridges and troughs, and Arctic sea ice melt and snow cover decline during the spring and summer months. It's an active area of research, but there's no doubt that climate change has been having Nike Football Shoes Ronaldo
Parts of Alaska Set Record Highs
Other noteworthy Alaska records included a December record high of 54F in King Salmon, which is situated along Bristol Bay in southwest Alaska. That broke the previous record of 51F, and records there date back to World War II. Daily high temperature records were also set at Kotzebue, Bettles, and Cold Bay, Alaska, among other locations, Thoman said.
The first nine days of December ran 22.2F above average in Barrow, and 18.5F above average in Kotzebue, according to NWS data.
Some weather stations located along the Dalton Highway south of Prudhoe Bay saw temperatures climb into the 40s, Thoman said.
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Thoman said such weather patterns are not uncommon during the winter months, although the extreme nature of this one was. "This kind of thing does happen with some frequency in the cold season," Thoman said.
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Alaskans have also seen a precipitous decline in the Western Arctic Caribou Herd, which is thought to be a result, at least in part, of an increase in fall freezing rain events. A colder atmosphere used to produce more snow events, but ice storms have become more common along the caribou's migration routes, which is helping to thin the herd, according to reporting by the Alaska Dispatch.
The upcoming weather pattern will be "A big change from what we've had, that's for sure," Thoman said.
Frontier State, Thoman said.
"You get these amplified patterns, and the cold air's gotta go somewhere, so you build up the ridge somewhere over the Gulf of Alaska . pump warm air into Alaska, and on the east side of that high, that cold air is going to come plunging south."
Thoman said it's possible, but not likely, that other climate stations in that area such as data collected at now defunct Cold War era early warning radar stations recorded slightly milder December temperatures when they were operating in the 1950s and 1960s.
December high temperature records were also set or tied at Barter Island AFB, which is a tiny airport located on a sliver of land along Alaska's wind whipped North Slope region, and in the small village of Wainwright, another Arctic shore location. Barter Island reached 37F, which tied its record last set in 1973, and Wainright hit 32F, beating the old record of 30F last set in 2006.
Although the long term forecast calls for continued warming during the next several decades, in the near term, the high pressure area over Alaska is weakening, allowing colder air and snowier weather to return to the Football Boots From China
The 2013 edition of the Report Card, published by the National Oceanic and Atmospheric Administration, will be released on Thursday.
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has been shivering from coast to coast with temperatures dropping as low as minus 40F amid one of the most severe early December cold snaps in several years, one state bucked the trend in an historic way.
Previously, the highest December temperature recorded at any of the two climate observation sites that have served Prudhoe Bay over the years was 35F, set on Dec. 31, 1973, according to Chris Burt, a blogger at Weather Underground.
For example, In Wainwright, changes in weather patterns have diminished the opportunities for subsistence hunters to safely hunt whales and caribou during the fall harvest season, according to a new study published in the journal Arctic.
The same contorted jet stream pattern that brought the brutal cold to the lower 48 states pushed a pulse of milder than average air into Alaska, where some spots recorded temperatures unheard of for December.
profound impacts in Alaska and other areas of the Arctic region.
Recent news reports from Alaska show that increasingly mild fall seasons and erratic weather patterns have had significant effects on local communities.
A strong ridge of high pressure was the main cause of the record warmth in Alaska.
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