Climate: Ocean acidification could reach critical level in key Alaska fishing grounds before mid-century


Pteropods swimming in the Scotia Sea, where scientists have also tracked the impacts of ocean acidification. Photo courtesy British Antarctic Survey.

Impacts likely to ripple through ocean ecosystem

Staff Report

FRISCO — Parts of the Arctic Ocean are acidifying so fast that some marine species may see their ability to build and maintain shells threatened as early as 2030, according to new research by NOAA, the University of Alaska, and Woods Hole Oceanographic Institution.

The study, published in the journal Oceanography, shows that surface waters of the Chukchi and Beaufort seas could reach a critical level of acidity within 15 years, with the Bering Sea reaching the threshold by 2044. Continue reading

Environment: Feds eye new Arctic drilling rules


Feds are seeking public comment on new rules for Arctic Sea drilling.

Major spill would devastate Arctic ecosystems

Staff Report

FRISCO — Proposed new Arctic drilling rules would require fossil fuel companies to have a spare drilling rig available in case they lose control of the primary well. The new rule is aimed at ensuring that companies operating in the Arctic are full prepared for the region’s extreme conditions.

As released in late February, the rules  focus solely on offshore exploration drilling operations within the Beaufort Sea and Chukchi Sea Planning Areas. The proposed rule is open for public comment through mid-April. Comment HERE. Continue reading

Arctic sea ice rebounds in October, but stays well below average

October Arctic sea ice has been declining at a rate of about 7.1 percent per decade during the satellite era.

Warm air temps due to open water inhibits ice growth in some areas

By Summit Voice

FRISCO — Arctic sea ice expanded quickly in October, with coverage doubling from the record low level of mid-September. But because the ice dwindled to an all-time low level this summer, even the record rebound in October couldn’t boost the ice extent back into the average range, according to the latest update from the National Snow and Ice Data Center.

The average ice extent for October was 2.7 million square miles, the second lowest in the satellite record and about 89,000 square miles above the 2007 record low for October. The ice extent is about 884,000 square miles below the 1979 to 2000 average. Continue reading

Climate: Arctic sea ice expanding, but impacts from record-low levels could still be felt the next few months

Antarctic sea ice extent remains above average

Antarctic sea ice has dwindled from a record-high extent in October but remains above average for this time of year. Bob Berwyn photo.

By Summit Voice

SUMMIT COUNTY — Although Arctic sea ice cover has grown quickly the past few weeks, the extent remained below the previous record low for a full 40 days before recently climbing back to near that 2007 level on Oct. 6.

According to the National Snow and Ice Data Center, sea ice extent had grown to about 2 million square miles as of Oct. 15, which is about 1.35 million square miles below the 1979 to 2000 mean. Ice extent is growing by about 38,600 square miles per day, expanding southward at the ice edge, as well as northward from the Arctic continental coasts

Despite the rapid growth of the sea ice extent in the past few weeks, vast areas of open water remain, resulting in a massive heat transfer from the ocean to the atmosphere, with potential impacts on atmospheric circulation in high latitudes, as the heat buildup over the Arctic changes pressure gradients in the region. Continue reading

Arctic sea ice tracks near record low in July

Arctic sea ice extent has been tracking near record low levels much of the summer.

Melting slowed down during second half of the month

By Summit Voice

SUMMIT COUNTY — Arctic sea continued to track at or near record low levels throughout July, as an early start to the melt season led to large areas of open water that speed up melting in adjacent ice areas.

As of July 23, satellite images showed areas of low sea ice concentration in the Beaufort and Chukchi seas, the Canadian Archipelago, the East Greenland Sea, and north of Siberia. In the Beaufort and Chukchi seas, according to the latest update from the National Snow and Ice Data Center.

During the first half of July, sea ice reached record-low levels numerous times, but melting slowed slightly during the second half of the month as storm systems brought cooler air to the region.

Large areas of open water (called polynyas) are being reported around areas of multiyear sea ice. Low ice concentrations mean a low surface albedo, allowing for more of the sun’s energy to be absorbed, melting even more sea ice. This makes the multiyear ice in the Beaufort and Chukchi seas vulnerable to melting out this summer, according to the NSIDC.

In parts of the Barents, Kara and Laptev seas, open water extends as far north as typically seen during September, at the end of the summer melt season. Sea ice extent is near normal in the Chukchi Sea and slightly above normal in the East Greenland Sea.

Polar bears: How far can they swim?

Scientists try to assess potential impact of shrinking sea ice

Some Polar bears in the Arctic can swim in excess of 200 miles, according to USGS research.

Scientists track Polar bears with by attaching GPS equipped collars to a sample population. These collars transmit data that help develop maps like this one that shows a swim of nearly 220 miles long. MAP COURTESY USGS.

By Bob Berwyn

SUMMIT COUNTY — Given the steady decline of sea ice in the Arctic and the status of polar bears as threatened under the Endangered Species Act, biologists are trying to understand how the top-level predators might respond to those changing conditions.

It’s important because some of the most recent studies link declining sea ice with dropping polar bear survival and reproduction rates in the Southern Beaufort Sea and around Hudson Bay.

“With the sea ice retreating earlier and coming back later, there’s less time for them to hunt in the spring, when put on their fat,” said Alaska-based U.S. Geological Survey researcher Anthony Pagano. “They end up in poor body condition,” Pagano said, adding that some of the studies suggest a downward trend in average body weight. Continue reading

Groups challenge EPA air quality permits to halt Arctic drilling

Lawsuit says Shell’s oil-drilling ship doesn’t comply with air quality regs

Environmental groups want to prevent industrial drilling operations in the Arctic Sea off the coast of Alaska. PHOTO COURTESY U.S. COAST GUARD.

By Summit Voice

SUMMIT COUNTY — Conservation groups are challenging proposed exploratory oil drilling the Arctic Sea at every step of the way, most recently with a lawsuit challenging an EPA air pollution permit for Shell’s proposed operations in the Beaufort and Chukchi seas.

The lawsuit filed in the 9th Circuit Court of Appeals last week claims the permits shouldn’t have been issued because Shell’s oil exploration ship, the Discoverer, doesn’t meet the latest Clean Air Act standards.

“As early as this summer, the Discoverer drillship and other ships in Shell’s fleet could be in the Chukchi Sea or Beaufort Sea of the Arctic Ocean drilling for oil in some of the harshest conditions on earth,” said Vera Pardee, an attorney with the Center. “Each year, Shell’s massive ships will churn out vast amounts of harmful pollution that will not only damage the Arctic’s fragile ecosystems but accelerate the climate change that’s robbing polar bears and walruses of the sea ice they need to survive.” Continue reading


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