USGS study projects Alaska permafrost losses

sdfg

A new USGS study projects a significant permafrost meltdown in Alaska by 2100.

Near-surface permafrost areas could shrink by 16-24 percent

Staff Report

Global warming is likely to take a big bite out of Alaska’s permafrost the next few decades, U.S. Geological Survey researchers said after analyzing new satellite data.

The maps suggest that the near-surface permafrost that presently underlies 38 percent of boreal and arctic Alaska would be reduced by 16 to 24 percent by the end of the 21st century under widely accepted climate scenarios. Permafrost declines are more likely in central Alaska than northern Alaska. Continue reading

Study finds evidence of prehistoric salmon fishing in Alaska

Spring-run Chinook salmon, photographed in Butte Creek, upstream from Centerville, Calif., may become extinct in the future due to warming waters. (Allen Harthorn, Friends of Butte Creek/photo) .

Salmon may have been a key food source for early North Americans. Photo courtesy USGS.

‘We now know that salmon have been consumed by North American humans at least 11,500 years ago …’

Staff Report

Digging deep into the remains of an ancient kitchen, archaeologists say that early residents of North America likely fished for salmon starting at the end of the last ice age, just as they started colonizing the continent.

The study, published this week in the Proceedings of the National Academy of Sciences, is the earliest known evidence that Ice Age humans in North America used salmon as a food source and shows that those settlers were not just big game hunters. Continue reading

Doing the climate-change two-step in Alaska

 

If only speeches could stop global warming …

FRISCO — Secretary of State John Kerry probably expressed what many people feel about climate change when he took to the podium at the GLACIER conference in Alaska Monday, describing the helplessness that can take hold when faced with a seemingly insurmountable problem.

“I have struggled for years, as I’m sure many of you have, with how you adequately take an issue of this magnitude, this kind of challenge, and put it in terms that average folks can really grab onto, where it isn’t so intimidating,” Kerry said.

But that can’t be an excuse to do nothing, Kerry continued, describing the Alaska conference as an important stepping stone on the way to critical climate talk in Paris coming up in December.

“Everywhere I travel, leaders and average folks talk to me about the impacts of climate change and what they feel and see is happening to their lives in one particular part of the world or another. And the Arctic is so important for us to visit and understand because the Arctic is in many ways a thermostat … and yet we already see is having a profound impact on the rest of the planet,” he said.

Kerry also referred to concerns about melting permafrost, which could release heat-trapping gases in such great volumes that it could trigger runaway global warming far beyond and scenario currently represented in climate models.

“The bottom line is that climate is not a distant threat for our children and their children to worry about. It is now. It is happening now. And I think anybody running for any high office in any nation in the word should come to Alaska or to any other place where it is happening and inform themselves about this. It is a seismic challenge that is affecting millions of people today,” Kerry said, describing how Alaska is a poster child for those challenges.

“And unless the global community comes together to address this challenge, the dramatic climate impacts that we’re seeing in this part of the world will be a harbinger for every part of the world,” he said.

 

Environment: Conservation activists call on President Obama to create Alaska marine preserves

 That was certainly not the case on June 17, 2013, the date that the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite acquired this rare, nearly cloud-free view of the state. The absence of clouds exposed a striking tapestry of water, ice, land, forests, and even wildfires.


On June 17, 2013, the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite acquired this rare, nearly cloud-free view of Alaska. The absence of clouds exposed a striking tapestry of water, ice, land, forests, and even wildfires. Click here to visit the NASA Earth Observatory page for more info.

‘Fragile and unraveling’ ecosystems need protection

Staff Report

FRISCO — With President Barack Obama highlighting climate change during a visit to Alaska, conservation activists are renewing their call for the designation of Marine National Monuments in Alaskan waters.

Far from being a frigid wasteland, the region’s ocean and coastal ecosystems are among the most productive in the world. But marine mammal, seabird, and fish populations are in decline, including some that have become threatened or endangered species. And threats from climate change overfishing, pollution, increased shipping, and offshore oil drilling. are growing. Continue reading

Environment: Canadian mine, energy developments stir trans-border unease in Alaska

asf

Ecosystems in a transboundary region are at issue in a series of upcoming meetings in Alaska. Map courtesy Rivers Without Borders.

Alaska communities seek international review of Canadian projects that will affect their rivers

Staff Report

FRISCO — Mining and energy development in western Canada is making some Alaskans uneasy, as they eye potential impacts to pristine salmon streams in the region.

Citing a bilateral environmental treaty, activists this week will meet with British Columbia’s Minister of Energy and Mines, Bill Bennett, when he visits Juneau and will ask him to support an international review of mine developments in northwest B.C.

The environmental and community advocates said an international review is the best way to develop specific, binding commitments to ensure clean water, salmon, jobs and traditional and customary practices are not harmed by mine development in British Columbia. Continue reading

Scientists to investigate spate of Alaska whale strandings

30 large whales reported dead in past year

sdfg

Bears feeding on a fin whale carcass in Larson Bay, Alaska; near Kodiak in June 2015. Photo courtesy NOAA.

Staff Report

FRISCO — Federal biologists said they’re launching an investigation into the cause of an unusually high number of whale deaths in the western Gulf of Alaska. In the past year, 11 fin whales, 14 humpback whales, one gray whale, and four unidentified cetaceans have stranded around the islands of the western Gulf of Alaska and the southern shoreline of the Alaska Peninsula.

As a result, the National Oceanic and Atmospheric Administration has declared a formal unusual mortality event, which triggers a focused, expert investigation. An unusual mortality event is a stranding event that is unexpected, involves a significant die-off of a marine mammal population, and demands immediate response. The number of large whale strandings for this region to almost three times the historical average for any comparable timespan. Continue reading

Losing ground: Coastal erosion seen as big threat in Alaska

dfg

A NASA Earth Observatory image shows part of Alaska’s coast.

New USGS study measures North Slope shoreline losses

Staff Report

FRISCO — In the eternal battle between land and sea, the sea appears to be winning in northern Alaska, where much of the coastline is retreating at a rate of more than three feet per year, according to a new study by the U.S. Geological Survey.

The region has some of the highest shoreline erosion rates in the world, according to the research, which analyzed more than 50 years worth of measurements.

“Coastal erosion along the Arctic coast of Alaska is threatening Native Alaskan villages, sensitive ecosystems, energy and defense related infrastructure, and large tracts of Native Alaskan, State, and Federally managed land,” said Suzette Kimball, acting director of the USGS. Continue reading

Follow

Get every new post delivered to your Inbox.

Join 8,993 other followers