Yereth Rosen

The federal agency that manages polar bears concedes the most important action needed to protect the threatened animals – reduction of global greenhouse gas emissions to curb Arctic warming that is thinning sea ice – is beyond its powers.

So a polar bear conservation management plan , issued in draft form Thursday by the U.S. Fish and Wildlife Service, focuses instead on actions the agency says it has the ability to accomplish...

Yereth Rosen

The shoreline along Alaska’s northern coast has eroded at some of the fastest rates in the nation, putting local communities, oil fields and coastal habitat at risk, says a new report from the U.S. Geological Survey.

The 1,000-mile coastline from the Canadian border in the east to Icy Cape in the west has lost ground at an average rate of 1.4 meters (4.6 feet) per year since the mid-20th century, said the report, which uses data dating back to the 1940s...

Yereth Rosen

A key permit issued on Tuesday by the Obama administration appears to dash Shell’s ambitions to use two rigs to drill simultaneously in the Chukchi Sea off Alaska's Arctic Coast this summer...

Yereth Rosen

City moose and country moose are different -- at least in their DNA.

A new study finds that Anchorage moose have greater genetic diversity than do moose on the Kenai Peninsula, and that the two populations have very different genetic structures. The findings, published in the journal Alces , indicate there is little gene flow between Anchorage and Kenai Peninsula moose, indicating very little interbreeding between the groups.

The study is by scientists from the U.S. Geological Survey, the Alaska Department of Fish and Game and the University of Alaska Fairbanks...

Yereth Rosen

Imperial Oil and its offshore Arctic joint-venture partners are delaying their plans for an ambitious drilling project in the Canadian Beaufort Sea, news organizations reported on Friday...

Yereth Rosen

It may be only June, but predictions are already in for Arctic sea ice conditions in September, the month of maximum melt and minimum coverage.

A collection of 32 scientific forecasts , released on Thursday, yields a median prediction of about 1.93 million square miles of sea ice extent in September, slightly less than levels reached last September...

Yereth Rosen

A tenacious, invasive aquatic plant is now growing in what might be the worst place in Alaska – the floatplane mecca of Lake Hood .

The site – actually two connected lakes in West Anchorage, part of the Anchorage international airport complex – has long been touted as the world’s busiest floatplane center. Now it could be the vector for the spread of elodea, a leafy, long-stemmed plant notorious for crowding out native species of freshwater flora...

Yereth Rosen

If it seems like there’s more fire activity in Alaska than in the past, that’s no illusion. The long-term record shows that Alaska’s wildfire season is expanding, according to recent studies.

Although fire seasons vary widely year to year, the trend over the past 65 years is for longer seasons, more fires over 1,000 acres, more acreage burned and more fires in Alaska's far north, according to a statistical report released Wednesday by the nonprofit science organization Climate Central ...

Yereth Rosen

A decade ago, oil operators on the North Slope found themselves in a climate predicament. The steady warming seen since the late 1960s had cut the tundra travel season -- the period when operators are able to build ice roads or send vehicles over the hard-frozen ground -- by half, from about 200 days to only about 100...

Yereth Rosen

Alaska’s heat wave, which has already resulted in record-breaking May temperatures, is expected to continue all the way through the start of fall, says the latest three-month forecast from the National Weather Service’s Climate Prediction Center ...

Yereth Rosen

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