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Scientists: Alaska's warming ocean puts food, jobs at risk

Ocean temps nearly 10 degrees above normal

(CNN) - The ice around Alaska is not just melting. It's gotten so low that the situation is endangering some residents' food and jobs.

"The seas are extraordinarily warm. It is impacting the ability for Americans in the region to put food on the table right now," said University of Alaska climate specialist Rick Thoman.

Ocean temperatures in the Chukchi and North Bering seas are nearly 10 degrees Fahrenheit (five degrees Celsius) above normal, satellite data shows.

"The northern Bering & southern Chukchi Seas are baking," Thoman wrote this week in a tweet.

There are immediate local and commercial impacts along the state's western and northern coastlines, Thoman told CNN. Birds and marine animals are showing up dead, he said, and sea temperatures are warm enough to support algal blooms, which can make the waters toxic to wildlife.

It's a mounting crisis for many coastal Alaska towns that depend on fishing to support their economy and feed people who live here.

"Much of what the people eat there over the course of the year comes from food they harvest themselves," said climatologist Brian Brettschneider at the International Arctic Research Center. "If people can't get out on the ice to hunt seals or whales, that affects their food security. It is a human crisis of survivability."

Events like this -- when weather patterns align to generate extreme consequences -- are also evidence of the growing climate crisis, scientists say.

 

A perfect storm for warming waters

 

Ice cover around Alaska normally lasts through the end of May. This year, it disappeared in March, as side-by-side maps showing the same date in March 2013 (left) and 2019 demonstrate, according to the Alaska Center for Climate Assessment and Policy.

Atmospheric patterns this year have put Alaska in an unlucky spot, Brettschneider said.

The unprecedented warming has been driven by southerly winds in the Bering Sea, with warm air from the south melting the ice at an alarming rate. Ocean temperatures in the region also have never been as warm during the peak of summer, based on seasonal averages. And communities in northern and western Alaska have seen temperatures close to their all-time June records.

In short, everything that could have "gone wrong" this year for the ice around Alaska has gone wrong, Brettschneider said.

 

This is a signal of global warming

 

The warming is a sure signal of a warming planet and part of the trend of increasing global temperatures, Brettschneider said.

"This event is unquestionably a reflection of our changing climate," he said. "The sea temperatures and sea ice deficits have not happened before as a random event. The mathematics just do not work out."

And this year's conditions will have a lasting effect.

"These extraordinary warm waters will take awhile to cool off as winter approaches," Thoman said, adding that a later and thinner ice formation is expected in the coming winter.

Meantime, if some conditions change, that won't negate the global warming trend.

"Next year, the winds could turn northerly. That tends to mask a warming signal," Brettschneider said, referring to the long-term warming trend of the planet. "It is just like in the lower 48 (states), where you can have major Arctic outbreaks if the winds are set up in the right direction. That masks an overall warming.

"What is happening in coastal Alaska is what is coming in one sense for everybody else," he told CNN. "Most people are feeling the effects of climate change even if they don't know it. Changes are happening, and changes will be magnified."

CNN's Monica Garrett contributed to this story.


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