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Arctic hotspots study reveals areas of climate stress in Northern Alaska and Siberia

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Arctic hotspots study reveals areas of climate stress in Northern Alaska and Siberia


Map of areas that experienced ecosystem climate stress in the Arctic-boreal region between 1997-2020 as detected by multiple variables including satellite data and long-term temperature records. Watts et al., 2025, Geophysical Research Letters. Credit: Christina Shintani / Woodwell Climate Research Center

Ecological warning lights have blinked on across the Arctic over the last 40 years, according to new research, and many of the fastest-changing areas are clustered in Siberia, the Canadian Northwest Territories, and Alaska.

An analysis of the rapidly warming Arctic-boreal region, published in Geophysical Research Letters, provides a zoomed-in picture of ecosystems experiencing some of the fastest and most extreme climate changes on Earth.

Many of the most climate-stressed areas feature permafrost, or ground that stays frozen year-round, and has experienced both severe warming and drying in recent decades.

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To identify these “hotspots,” a team of researchers from Woodwell Climate Research Center, the University of Oslo, the University of Montana, the Environmental Systems Research Institute (Esri), and the University of Lleida used more than 30 years of geospatial data and long-term temperature records to assess indicators of ecosystem vulnerability in three categories: temperature, moisture, and vegetation.

Building on assessments like the NOAA Arctic Report Card, the research team went beyond evaluating isolated metrics of change and looked at multiple variables at once to create a more complete, integrated picture of climate and ecosystem changes in the region.

“Climate warming has put a great deal of stress on ecosystems in the high latitudes, but the stress looks very different from place to place and we wanted to quantify those differences,” said Dr. Jennifer Watts, Arctic program director at Woodwell Climate and lead author of the study.

“Detecting hotspots at the local and regional level helps us not only to build a more precise picture of how Arctic warming is affecting ecosystems, but to identify places where we really need to focus future monitoring efforts and management resources.”

The team used spatial statistics to detect “neighborhoods,” or regions of particularly high levels of change during the past decade.

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“This study is exactly why we have developed these kinds of spatial statistic tools in our technology. We are so proud to be working closely with Woodwell Climate on identifying and publishing these kinds of vulnerability hotspots that require effective and immediate climate adaptation action and long-term policy,” said Dr. Dawn Wright, chief scientist at Esri. “This is essentially what we mean by the ‘Science of Where.’”

The findings paint a complex and concerning picture.

The most substantial land warming between 1997–2020 occurred in the far eastern Siberian tundra and throughout central Siberia. Approximately 99% of the Eurasian tundra region experienced significant warming, compared to 72% of Eurasian boreal forests.

While some hotspots in Siberia and the Northwest Territories of Canada grew drier, the researchers detected increased surface water and flooding in parts of North America, including Alaska’s Yukon-Kuskokwim Delta and central Canada. These increases in water on the landscape over time are likely a sign of thawing permafrost.

  • Arctic hotspots study reveals areas of climate stress in Northern Alaska, Siberia
    Warming severity “hotspots” in Arctic-boreal region between 1997-2020 were detected by analyzing multiple variables including satellite imagery and long-term temperature records. Watts et al., 2025, Geophysical Research Letters. Credit: Christina Shintani / Woodwell Climate Research Center
  • Arctic hotspots study reveals areas of climate stress in Northern Alaska, Siberia
    Map of areas of severe to extremely severe drying in the Arctic-boreal region. Drying severity was determined by analyzing multiple variables from the satellite record. Watts et al., 2025, Geophysical Research Letters. Credit: Christina Shintani / Woodwell Climate Research Center
  • Arctic hotspots study reveals areas of climate stress in Northern Alaska, Siberia
    Map of areas that experienced vegetation climate stress in the Arctic-boreal region between 1997-2020 as detected by multiple variables from the satellite record. Watts et al., 2025, Geophysical Research Letters. Credit: Christina Shintani / Woodwell Climate Research Center

Among the 20 most vulnerable places the researchers identified, all contained permafrost.

“The Arctic and boreal regions are made up of diverse ecosystems, and this study reveals some of the complex ways they are responding to climate warming,” said Dr. Sue Natali, lead of the Permafrost Pathways project at Woodwell Climate and co-author of the study.

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“However, permafrost was a common denominator—the most climate-stressed regions all contained permafrost, which is vulnerable to thaw as temperatures rise. That’s a really concerning signal.”

For land managers and other decisionmakers, local and regional hotspot mapping like this can serve as a more useful monitoring tool than region-wide averages. Take, for instance, the example of COVID-19 tracking data: maps of county-by-county wastewater data tend to be more helpful tools to guide decision making than national averages, since rates of disease prevalence and transmission can vary widely among communities at a given moment in time.

So, too, with climate trends: local data and trend detection can support management and adaptation approaches that account for unique and shifting conditions on the ground.

The significant changes the team detected in the Siberian boreal forest region should serve as a wakeup call, said Watts.

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“These forested regions, which have been helping take up and store carbon dioxide, are now showing major climate stresses and increasing risk of fire. We need to work as a global community to protect these important and vulnerable boreal ecosystems, while also reining in fossil fuel emissions.”

More information:
Regional Hotspots of Change in Northern High Latitudes Informed by Observations From Space, Geophysical Research Letters (2025). DOI: 10.1029/2023GL108081

Provided by
Woodwell Climate Research Center

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Arctic hotspots study reveals areas of climate stress in Northern Alaska and Siberia (2025, January 16)
retrieved 16 January 2025
from https://phys.org/news/2025-01-arctic-hotspots-reveals-areas-climate.html

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‘Ticking time bomb’: Extreme snowfall fuels avalanche danger around Haines

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‘Ticking time bomb’: Extreme snowfall fuels avalanche danger around Haines


Avalanche professionals are warning backcountry adventurers to stay out of risky terrain after snow slammed the Upper Lynn Canal in late December.

National Weather Service data shows the storm dumped at least 44 inches of snow in Haines, making it the sixth snowiest five-day period in more than two decades. Other reports documented closer to six or seven feet.

“It was definitely one of the higher snowfalls you’ve gotten in five days, pretty much out of all your time that the station’s been there,” said Juneau-based meteorologist Edward Liske.

The dumping has created a risky situation in the backcountry that warrants extreme caution, said Jeff Moskowitz, the director of the Haines Avalanche Center.

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His main message: “Avoid being in or around avalanche terrain.”

Earlier this week, Moskowitz dug a snow pit in town – in front of Haines’ historic Fort Seward – that confirmed his assessment. Standing chest-deep in the pit, he pointed out layers of snow stacked on top of each other, each representing a different storm.

There was a somewhat fluffy layer on top, from the snowfall in early January. Below that, there was a roughly three-foot-deep layer that was more compact, from the late December storm.

And then there was a thin, feeble layer of snow just inches from the ground that crumbled like sugar when Moskowitz ran his hand through it. That snow was on the ground before the big storm – it’s the layer that could collapse and trigger an avalanche under the weight of more precipitation, snowmachines or humans.

“We have about a meter of really strong snow just sitting over this sugar,” Moskowitz said, calling it a “dangerous combination for avalanches.”

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Jeff Moskowitz directs the Haines Avalanche Center, the Chilkat Valley’s primary source of avalanche information.

Starting Dec. 27, the situation prompted the center to issue warnings about high avalanche risk in the Haines area. Moskowitz said people should stay off slopes that are greater than 30 degrees – and avoid traveling beneath them.

“It’s just a tricky situation, because there’s lots of snow, and we want to go play,” he said. “But we still have this strong-over-weak layering in most places.”

In some places, he said, the weak layer may be buried so deep that a human or snowmachine wouldn’t trigger it. But in shallower areas, like near trees or rocks. the layer would be closer to the surface and more likely to trigger an avalanche.

“People could ride that slope numerous times until one person finds that weak spot,” he said.

The deluge has stopped for now. But the situation could get worse before it gets better, as temperatures rise and the top layer of snow consolidates into a heavier, thicker slab. New precipitation or other conditions could trigger a natural avalanche cycle, wiping that weak layer out.

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“Otherwise, it’s a little bit like a ticking time bomb,” Moskowitz said.

Haines Avalanche Center

The Haines Avalanche Center is a nonprofit and the main source of avalanche information in the Chilkat Valley, which draws backcountry adventurers from around the world. Moskowitz emphasized the importance of donations, grants and borough funding to make that work possible.

In the past, the Haines Borough has asked nonprofits to apply for funding from a $100,000 bucket. But Haines Mayor Tom Morphet said that, amid a steep budget deficit, the assembly discontinued that grant process for fiscal year 2026, which runs through June.

That has meant less funding than usual for the Avalanche Center, which has just three part-time employees, including Moskowitz.

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“Less funding means less staff time,” Moskowitz said. “And staff time means that locals who are avalanche professionals and have certifications are out there, digging in the snow, making assessments, posting that information publicly.”

The center posts a general avalanche information product every week, plus a weather forecast and season summary. They also issue advisories when avalanche danger is high, including three days in a row in late December.

But the center does not currently have the funding or staff capacity to consistently publish advisories when avalanche risk is low, moderate or considerable.

“What we don’t want, is that there’s an accident that sparks the public interest in supporting the Avalanche Center,” Moskowitz said. “We just need to maintain the services we provide and just keep it going year after year after year.”

Morphet, the mayor, said the borough and assembly are “acutely aware” of the center’s importance.

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Moskowitz said people who recreate in the backcountry can help by paying close attention to their surroundings – and he urged them to send in their observations online.

That could mean details about a human-triggered or natural avalanche, about where the sun has hit the mountains on a particular day, or an observation that feathery crystals – known as surface hoar – have started forming on the snow’s surface.

“There’s very little information that we’re not going to find useful,” Moskowitz said. “All of that is very valuable, and it helps to inform this bigger picture.”



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Alaska delegation mixed on Venezuela capture legality, day before presidential war powers vote

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Alaska delegation mixed on Venezuela capture legality, day before presidential war powers vote


ANCHORAGE, Alaska (KTUU) – Alaska’s congressional delegation had mixed reactions Wednesday on the legality of the Trump administration’s actions in Venezuela over the weekend, just a day before they’re set to vote on a bill ending “hostilities” in Venezuela.

It comes days after former Venezuelan Nicolás Maduro was captured by American forces and brought to the United States in handcuffs to face federal drug trafficking charges.

All U.S. Senators were to be briefed by the administration members at 10 a.m. ET Wednesday, including Secretary of State Marco Rubio and Secretary of Defense Pete Hegseth, according to CBS News.

Spokespersons for Alaska Sens. Lisa Murkowski, R-Alaska, and Dan Sullivan, R-Alaska, say they were at that meeting, but from their responses, the two shared different takeaways.

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Sullivan, who previously commended the Trump administration for the operation in Venezuela, told KDLL after his briefing that the next steps in Venezuela would be done in three phases.

“One is just stabilization. They don’t want chaos,” he said.

“The second is to have an economic recovery phase … and then finally, the third phase is a transition to conduct free and fair elections and perhaps install the real winner of the 2024 election there, which was not Maduro.”

Murkowski spokesperson Joe Plesha said she had similar takeaways to Sullivan on the ousting of Maduro, but still held concerns on the legality.

“Nicolás Maduro is a dictator who led a brutally oppressive regime, and Venezuela and the world are better places without him in power,” Plesha said in a statement Wednesday. “While [Murkowski] continues to question the legal and policy framework that led to the military operation, the bigger question now is what happens next.”

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Thursday, the Senate will decide what happens next when they vote on a war powers resolution which would require congressional approval to “be engaged in hostilities within or against Venezuela,” and directs the president to terminate the use of armed forces against Venezuela, “unless explicitly authorized by a declaration of war or specific authorization for use of military force.”

Several House leaders have also received a briefing from the administration according to CBS News. A spokesperson for Rep. Nick Begich, R-Alaska, said he received a House briefing and left believing the actions taken by the administration were legal.

“The information provided in today’s classified House briefing further confirmed that the actions taken by the Administration to obtain Maduro were necessary, time-dependent, and justified; and I applaud our military and the intelligence community for their exceptional work in executing this operation,” Begich said in a statement.

Looming vote

Sen. Tim Kaine, D-VA, authored the war powers resolution scheduled for debate Thursday at 11 a.m. ET — 7 a.m. AKST.

It’s a resolution which was one of the biggest topics of discussion on the chamber floors Wednesday.

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Sen. Rand Paul, R-KY, said on the Senate floor Wednesdya that the actions taken by the administration were an “act of war,” and the president’s capture of Maduro violated the checks and balances established in the constitution, ending his remarks by encouraging his colleagues to vote in favor of the resolution.

“The constitution is clear,” Paul said. “Only Congress can declare a war.”

If all Democrats and independents vote for the Kaine resolution, and Paul keeps to his support, the bill will need three more votes to pass. If there is a tie, the vice president is the deciding vote.

“It’s as if a magical dust of soma has descended through the ventilation systems of congressional office buildings,” Paul continued Wednesday, referring to a particular type of muscle relaxant.

“Vague faces in permanent smiles and obedient applause indicate the degree that the majority party has lost its grip and have become eunuchs in the thrall of presidential domination.”

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Legality of actions under scrutiny

U.S. forces arrested Maduro and his wife, Cilia Flores, from their Caracas home in an overnight operation early Saturday morning, Alaska time. Strikes accompanying the capture killed about 75 people, including military personnel and civilians, according to U.S. government officials granted anonymity by The Washington Post.

Maduro pleaded not guilty Monday in a New York courtroom to drug trafficking charges that include leading the “Cartel of the Suns,” a narco-trafficking organization comprised of high-ranking Venezuelan officials. The U.S. offered a $50 million reward for information leading to his capture.

Whether the U.S. was legally able to capture Maduro under both domestic and international law has been scrutinized in the halls of Congress. Members of the administration, like Secretary of State Marco Rubio, have been open in defending what they say was a law enforcement operation carrying out an arrest warrant, The Hill reports. Lawmakers, like Paul or Sen. Chuck Schumer, D-NY, say the actions were an act of war and a violation of the constitution.

While the president controls the military as commander in chief, Congress constitutionally has the power to declare wars. Congressional Democrats have accused Trump of skirting the Constitution by not seeking congressional authorization before the operation.

Murkowski has not outright condemned or supported the actions taken by the administration, saying in a statement she was hopeful the world was safer without Maduro in power, but the way the operation was handled is “important.”

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Sullivan, on the other hand, commended Trump and those involved in the operation for forcing Maduro to “face American justice,” in an online statement.

Begich spokesperson Silver Prout told Alaska’s News Source Monday the Congressman believed the operation was “a lawful execution of a valid U.S. arrest warrant on longstanding criminal charges against Nicolás Maduro.”

The legality of U.S. military actions against Venezuela has taken significant focus in Washington over the past several months, highlighted by a “double-tap” strike — a second attack on the same target after an initial strike — which the Washington Post reported killed people clinging to the wreckage of a vessel after the military already struck it. The White House has confirmed the follow-up attack.

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Sullivan, who saw classified video of the strike, previously told Alaska’s News Source in December he believed actions taken by the U.S. did not violate international law.

“I support them doing it, but they have to get it right,” he said. “I think so far they’re getting it right.”

Murkowski, who has not seen the video, previously said at an Anchorage press event the takeaways on that strike’s legality seem to be divided along party lines.

“I spoke to a colleague who is on the Intelligence Committee, a Republican, and I spoke to a colleague, a Democrat, who is on the Senate Armed Services Committee … their recollection or their retelling of what they saw [was] vastly different.”

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National Native helpline for domestic violence and sexual assault to open Alaska-specific service

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National Native helpline for domestic violence and sexual assault to open Alaska-specific service


A national support line for Native survivors of domestic violence and sexual assault has begun work to launch an Alaska-specific service. Strong Hearts Native Helpline is a Native-led nonprofit that offers 24-hour, seven-day-a-week support for anonymous and confidential calls from people who have experienced domestic violence or sexual assault. The line is staffed by Native […]



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