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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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Citation:
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

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.

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Alaska’s voter roll transfer: Republicans bash hearing questioning if lieutenant governor broke the law

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Alaska’s voter roll transfer: Republicans bash hearing questioning if lieutenant governor broke the law


JUNEAU, Alaska (KTUU) – A legislative hearing into the legality of Alaska’s voter roll transfer to the federal government ended in partisan accusations Monday, with one Republican calling it a “set-up” and others saying it was unnecessary, while Democrats defended it as needed oversight.

“Andrew (Gray) and the committee has a bias. I mean, that much is obvious from watching it,” Rep. Kevin McCabe, R-Big Lake, told Alaska’s News Source walking out of the hearing before it gaveled out. “Most of the testimony was slanted against the state and against the federal government.”

The House State Affairs and Judiciary committees met jointly Monday to hear testimony about whether Dahlstrom violated the law when she transferred the entirety of Alaska’s voter rolls to the federal government.

Rep. Steve St. Clair, R-Wasilla, agreed with his Big Lake counterpart that the hearing was unnecessary.

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“I think we’re speculating on what the intent of the DOJ is and I believe we need to wait and see,” he said.

Rep. Andrew Gray, D-Anchorage and chair of the House Judiciary Committee, pushed back when told of his Republican colleagues’ reaction.

“I think that I went above and beyond to try to include everybody,” Gray said as he left the meeting. “If people are saying that if the Obama administration had asked for the unredacted voter rolls from Alaska, that all these Republicans around here would have just been like, ‘oh, take it all. Take all of our information.’

“That is not true. That is absolutely not true,” Gray added.

Rep. Ted Eischeid, D-Anchorage, backed his House majority colleague, questioning whether Republicans would have preferred if the topic not be addressed at all.

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“The minority folks on the committee had a chance to ask questions,” he said. “I think this is a meeting we needed to have. Alaskans have asked for it. I think there’s still a lot of unanswered questions. So shedding light on the state’s actions, that’s bias?”

Dahlstrom did not attend the hearing. Gray said she was invited multiple times but cited scheduling conflicts. The lieutenant governor oversees the Alaska Division of Elections under state law.

In her most recent public statement — published Feb. 25 on her gubernatorial campaign website, not through her official office — Dahlstrom defended the voter roll transfer, saying the agreement with the DOJ was “lawful, limited” and that Alaska retains full authority over its voter rolls.

“The DOJ cannot remove a single voter from our rolls,” she wrote. “Its role is limited to identifying potential issues, such as duplicate registrations or individuals who may have moved or passed away.”

Representatives from the state’s Department of Law and Division of Elections both testified in defense of Dahlstrom’s decision. Rachel Witty, the Department of Law’s director of legal services, told the committee the state viewed the DOJ’s purview.

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“The DOJ’s enforcement authority is quite broad,” Witty said. “And so, we interpreted their request as being used to evaluate and enforce HAVA compliance.”

HAVA — the Help America Vote Act — is a federal law that sets election administration standards for states.

Lawmakers also heard from an assortment of outside witnesses who largely questioned the legality of Dahlstrom’s actions, including former Lt. Gov. Loren Leman, who served under Republican Gov. Frank Murkowski, and former Attorney General Bruce Botelho, who served under Democratic Gov. Tony Knowles.

The Documents: A Months-Long Timeline

As part of the hearing, the committee released months’ worth of documents between the Department of Justice — led by Attorney General Pam Bondi — and Dahlstrom’s office, detailing the effort to transfer Alaska’s voter rolls over to Washington.

The DOJ first asked Dahlstrom to release the voter rolls in July of last year, citing the 1993 National Voter Registration Act, which requires states to allow federal inspection of “official lists of eligible voters.”

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Dahlstrom agreed to release the records in August, providing a list of voters designated as “inactive” and “non-citizens,” along with their voting records and the statewide voter registration list — but it did not include what the DOJ wanted.

“As the Attorney General requested, the electronic copy of the statewide [voter registration list] must contain all fields,” reads an email sent 10 days after Dahlstrom agreed to release the data, “including the registrant’s full name, date of birth, residential address, his or her state driver’s license number or the last four digits of the registrant’s social security number.”

Dahlstrom agreed to provide the full details months later, in December, citing a state statute that permits sharing confidential information with a federal agency if it uses “the information only for governmental purposes authorized under law.” Those purposes, she wrote in the email, are to “test, analyze and assess the State’s compliance with federal laws.”

“I attach some significance to the fact that it took the State … nearly four months to respond to the Department of Justice’s demand,” former AG Botelho told the committee.

That same day, Dahlstrom, Alaska Division of Elections Director Carol Beecher and DOJ Assistant Attorney General Harmeet Dhillon signed a memorandum of understanding governing how the data could be accessed, used, and protected.

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Dahlstrom’s office publicly announced the transfer nine days after the MOU was signed — nearly six months after the DOJ first made its request.

“Alaska is committed to the integrity of our elections and to complying with applicable law,” Dahlstrom said in the December statement. “Upon receiving the DOJ’s request, the Division of Elections, in consultation with the Department of Law, provided the voter registration list in accordance with federal requirements and state authority, while ensuring appropriate safeguards for sensitive information.”

A 10-page legal analysis from legislative counsel Andrew Dunmire, requested by House Majority Whip Rep. Zack Fields, D-Anchorage, concluded that the DOJ’s demand defied legal bounds.

“The DOJ’s request for state voter data is unprecedented,” Dunmire’s analysis states, adding that the legal justification the DOJ used to demand access to the data has never been applied this way before.

“Multiple states refused DOJ’s request, which has resulted in litigation that is now working its way through federal courts across the country,” he adds.

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The Senate holds an identical hearing Wednesday, when its State Affairs and Judiciary committees take up the same questions.

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Alaska Air National Guard rescues injured snowmachiner near Cooper Landing

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Alaska Air National Guard rescues injured snowmachiner near Cooper Landing


 

An Alaska Air National Guard HH-60W Jolly Green II helicopter, assigned to the 210th Rescue Squadron, 176th Wing, returns to Joint Base Elmendorf-Richardson, Alaska, after conducting a rescue mission for an injured snowmachiner, Feb. 21, 2026. The mission marked the first time the AKANG used the HH-60W for a rescue. (U.S. Air National Guard photo by Staff Sgt. Joseph Moon)

Alaska Air National Guard personnel conducted a rescue mission Saturday, Feb. 21, after receiving a request for assistance from the Alaska State Troopers through the Alaska Rescue Coordination Center.

The mission was initiated to recover an injured snowmachiner in the Cooper Landing area, approximately 60 air miles south of Joint Base Elmendorf-Richardson. The Alaska Air National Guard accepted the mission, located the individual, and transported them to Providence Alaska Medical Center in Anchorage for further medical care.

The mission marked the first search and rescue operation conducted by the 210th Rescue Squadron using the HH-60W Jolly Green II, the Air Force’s newest combat rescue helicopter, which is replacing the older HH-60G Pave Hawk. Guardian Angels assigned to the 212th Rescue Squadron were also aboard the aircraft and assisted in the recovery of the injured individual.

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Good Samaritans, who were on the ground at the accident site, deployed a signal flare, that helped the helicopter crew visually locate the injured individual in the heavily wooded area.
Due to the mountainous terrain, dense tree cover, and deep snow in the area, the helicopter was unable to land near the patient. The aircrew conducted a hoist insertion and extraction of the Guardian Angels and the injured snowmachiner. The patient was extracted using a rescue strop and hoisted into the aircraft.

The Alaska Air National Guard routinely conducts search and rescue operations across the state in support of civil authorities, providing life-saving assistance in some of the most remote and challenging environments in the world.



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Alaska House advances bill to boost free legal aid for vulnerable Alaskans

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Alaska House advances bill to boost free legal aid for vulnerable Alaskans





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