Arctic fires do more harm than the smoke you can see. They burn off the moss that keeps the ground frozen, and the permafrost underneath can then release carbon for decades. A small group of scientists, Indigenous leaders and firefighters thinks putting out the right fires may be one of the cheapest climate fixes available.
Key takeaways
- Permafrost holds about 1.5 trillion tons of carbon, roughly twice what is in the atmosphere.
- Fire strips off the insulating ground layer. In one Alaskan burn scar, the ground has thawed about three times deeper than in unburned forest nearby.
- A 2022 study put the cost of fighting more boreal fires at about $12.63 per ton of CO2 avoided, which is in the same range as wind and solar.
- New tools are on the way, including the FireSat satellites (first three launched on 7 July 2026), fire-risk maps and cultural burns planned for spring 2027.
Why are Arctic fires a climate problem, not just a local one?
Permafrost is ground that stays frozen all year. It sits under about 15% of the Northern Hemisphere’s land and holds plant and animal remains that have been locked in ice for thousands of years. When it thaws, microbes start breaking down that material and release carbon dioxide and methane.
Think of the moss and peat on top as a cooler lid. Fire removes the lid. In reporting for MIT Technology Review published on 19 October 2026, James Temple visited the scar of the July 2021 Yankovich Road Fire on the University of Alaska Fairbanks campus. Five years after the fire, a thaw probe went about three times deeper into the burned ground than into the forest next to it, where frozen soil starts about a foot down.
The effect is not short-lived. A synthesis by Woodwell Climate Research Center found that the seasonally thawed layer, known as the active layer, kept getting deeper for two decades after fire at burned sites across boreal and tundra regions.
How bad have the fires become?
The Arctic-boreal region is warming up to four times faster than the global average, and the numbers show it. Since 2001, emissions from forest fires worldwide have risen about 60%. In boreal forests, the cold northern belt of spruce, pine and birch, they have nearly tripled.
Canada’s 2023 fire season, the largest on record there, released more carbon than the country’s fossil fuels did that year. Researchers also warn about a feedback loop: warmer weather means more fire, more fire means more thaw, and more thaw means more warming.
Most climate models used in UN reports leave out permafrost loss, and none capture sudden collapse after a fire or heat wave. Brian Buma of the Environmental Defense Fund called that a “massive blind spot.” Under high-warming scenarios, fire-driven thaw alone could add emissions equal to nearly 80 billion tons of CO2 by 2100. That comes on top of more than 400 billion tons from warming in general.
Is fighting Arctic fires actually worth the money?
On paper, yes. A 2022 Science Advances study by Woodwell and Tufts researchers used Alaska data from 2007 to 2015. It estimated that stronger fire suppression would cost about $12.63 per metric ton of CO2 avoided, which puts it alongside wind, solar and carbon removal. The figure did not count permafrost carbon, so the true cost is probably lower.
The overall bill is still large. Keeping Alaska’s fire emissions at historical levels would cost about $7 billion this decade and between $7 billion and $50 billion over the following 30 years. Funding is also lopsided. Alaska produces about half of US wildfire carbon emissions but gets less than 4% of federal fire-management money, according to Woodwell’s Permafrost Pathways project.
What tools are being tested?
No single fix exists. The most likely result is a mix of quick detection, targeted firefighting and prevention. Here is how the main options compare:
| Approach | What it does | Status | Main catch |
|---|---|---|---|
| Targeted suppression | Fights remote fires that threaten carbon-rich yedoma permafrost | Pilot on 1.6 million acres of Yukon Flats refuge | Crews are limited, and firefighter safety comes first |
| FireSat satellites | Spot fires as small as 5 by 5 metres | First 3 launched on 7 July 2026; full network expected in the early 2030s | Detection alone puts nothing out |
| Cultural burning | Small, controlled Indigenous burns reduce fuel | Fort Yukon pilot planned for spring 2027 | Fires can escape, and smoke can reach towns |
| Fuel breaks | Logging or planting less flammable deciduous trees | British Columbia study by the Polis Institute | Slow to set up over huge areas |
| Autonomous aircraft | Uncrewed Black Hawk helicopters carry water to fires | Tests by Sikorsky with Rain Industries software | Unproven at Arctic scale |
The Yukon Flats pilot is the furthest along. Former refuge manager Jimmy Fox pushed for it, and Alaska Public Media reported that he called it “a pretty radical idea.” Firefighters act when resources are available and they expect to contain the fire within 72 hours. Their focus is yedoma, a deep, ice-rich permafrost that is at least half ice. After federal research cuts under DOGE, the government kept the program in February 2026 and widened its goals to cover habitat, water and air quality.
Won’t putting out fires just make later ones worse?
That is the strongest objection. Fire is a natural part of boreal forests, and a century of total suppression in the western US built up the fuel behind today’s megafires. Michelle Mack of Northern Arizona University argues that suppression may only delay carbon loss. She favours prevention instead, such as thinning, prescribed burns and planting deciduous trees as “living fire breaks.”
Woodwell’s Brendan Rogers says the combined approach “can make a real difference.” Edward Alexander of Gwich’in Council International put it more simply:
“We need mild fire, not wildfire.”
Our view: Alexander has the best line in this debate. The goal is not to stop fire in the north. It is to return to the smaller, cooler fires these forests evolved with, which Indigenous communities managed for thousands of years until colonial-era bans began in the 1800s.
What happens next
Several things are already scheduled. FireSat should provide data at least twice a day by the end of 2026, and four more satellites are planned by the end of 2027. The North Fire initiative, a multimillion-dollar effort by Woodwell, the Polis Institute and the Alaska Venture Fund, will run cultural burns near Fort Yukon in spring 2027 with the Council of Athabascan Tribal Governments. Woodwell is building burn-risk and carbon-vulnerability maps for interior Alaska. It plans to extend them across Canada and hopes to forecast fire risk 10 to 15 years ahead.
The hard parts are still unsolved: money, staffing and evidence. As Buma put it, “We can’t overpromise what’s possible. We don’t know what’s possible.”
FAQ
Why do Arctic fires thaw permafrost?
Fire burns away the moss and organic soil that insulate frozen ground. Without that layer, summer heat reaches deeper, and the thawed layer can keep growing for about 20 years after the fire.
How much carbon is in permafrost?
Estimates range from about 1.4 to 1.5 trillion tons. That is roughly twice the amount of carbon currently in Earth’s atmosphere.
Is fire suppression a proven climate solution?
Not yet. Cost models look promising, at about $12.63 per ton of CO2 avoided, but pilots like Yukon Flats are still gathering data on how much carbon suppression really saves over time.
To follow this story, keep an eye on FireSat’s first public data and the Fort Yukon cultural burns in spring 2027. Those results will show whether “mild fire” can work at scale.
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