The Docket | Emerging Science

The Undercounting Pattern

The Fire Beneath the Data

By Maya Jiménez— March 18, 2026

Feature image for article: The Fire Beneath the Data

In Western fire country, every decision traces back to a number. Whether a prescribed burn gets approved in Jackson County. Whether a school in the Sierra foothills keeps kids indoors. Whether an insurer writes a policy or walks away. The numbers come from satellites, and the satellites were built to see heat from above.

A team from Lund University and UC Berkeley went to the ground. What they found reaches past any single database entry, into the smoke management plans, the air quality apps, the health studies that told communities how much danger they were breathing. The instruments measured what they were designed to measure. The fire was somewhere else, underground, invisible to orbit.

The Undercounting Pattern

The Fire Beneath the Data

In Western fire country, every decision traces back to a number. Whether a prescribed burn gets approved in Jackson County. Whether a school in the Sierra foothills keeps kids indoors. Whether an insurer writes a policy or walks away. The numbers come from satellites, and the satellites were built to see heat from above.

A team from Lund University and UC Berkeley went to the ground. What they found reaches past any single database entry, into the smoke management plans, the air quality apps, the health studies that told communities how much danger they were breathing. The instruments measured what they were designed to measure. The fire was somewhere else, underground, invisible to orbit.

Maya Jiménez

Maya Jiménez, 34, is a Polk Award-winning narrative journalist covering climate adaptation, environmental justice, and community resilience. Born in Guatemala City and raised in Oakland, she specializes in collaborative journalism that centers frontline voices, spending months embedded with communities facing climate impacts.

Revised Upward

Six studies published in early 2026 share a finding that wasn't coordinated but probably should unsettle you anyway: the instruments we built to measure the climate crisis keep understating it. Satellites can't see the fires burning underground. Surface monitors miss heat sinking into the deep ocean. Regulatory categories exclude the smoke deaths. Ecosystems that look calm may be running on fumes.

None of these papers discovered a new problem. Each discovered that an existing one was larger, faster, or more structurally hidden than the data had been showing. The gap between what we measured and what was actually happening.

Revised Upward

Six studies published in early 2026 share a finding that wasn't coordinated but probably should unsettle you anyway: the instruments we built to measure the climate crisis keep understating it. Satellites can't see the fires burning underground. Surface monitors miss heat sinking into the deep ocean. Regulatory categories exclude the smoke deaths. Ecosystems that look calm may be running on fumes.

None of these papers discovered a new problem. Each discovered that an existing one was larger, faster, or more structurally hidden than the data had been showing. The gap between what we measured and what was actually happening.

Hidden Carbon

Satellites Miss Half of Boreal Fire Emissions

Peat fires burn underground, invisible to satellites. During Sweden's 2018 fire season, organic soil emissions were underestimated by 50% nationally and up to 14 times in one county. Boreal forests hold more carbon than the entire atmosphere. What burns beneath them goes unrecorded. — Eckdahl et al., Science Advances, 2026.

Fish Decline

Northern Hemisphere Fish Biomass Quietly Collapsed

Chronic ocean warming drove fish biomass declines of up to 19.8% across major Northern Hemisphere basins between 1993 and 2021. Marine heatwaves obscure the trend by temporarily boosting populations at cold-range edges, producing transient gains that could mislead fisheries managers into raising quotas. — Chaikin et al., Nature Ecology & Evolution, February 2026.

Deep Heat

Ocean Heat Record Set for Ninth Straight Year

Global ocean heat content set another record in 2025, roughly 23 zettajoules above the 1981–2010 average in the upper 2,000 meters. Surface temperatures can dip during La Niña while deep-ocean warming continues unbroken. The monitoring we rely on watches the surface. — Pan, Cheng et al., Advances in Atmospheric Sciences, January 2026.

Planetary Shift

Melting Ice Is Slowing Earth's Rotation Measurably

Ice sheet melt is redistributing mass toward the equator, lengthening days by 1.33 milliseconds per century. That rate is unmatched in 3.6 million years. By 2100, the climate-driven effect on Earth's spin could rival the gravitational pull of the Moon itself. — Kiani Shahvandi & Soja, Journal of Geophysical Research, March 2026.

Smoke Deaths

Wildfire Smoke Kills 24,100 Americans a Year

Wildfire smoke PM2.5 caused an estimated 24,100 U.S. deaths per year from 2006 to 2020. No safe exposure threshold was found. The EPA does not regulate this particulate source because wildfires are classified as natural disasters. The study's county-level methodology may itself mask finer-grained variation in who breathes what. — Zhang et al., Science Advances, February 2026.

False Stability

Stable-Looking Ecosystems May Already Be Depleted

Species turnover across global ecosystems has slowed roughly one-third since the 1970s. That looks like stability. Researchers say it signals the opposite: shrinking species pools cycling fewer replacements through, weakening the biological dynamism that underpins resilience. Some experts dispute the finding's scope. — Nwankwo & Rossberg, Nature Communications, February 2026.

The Research

Boreal Wildfire Carbon Emissions Underestimated by Up to 50 Percent

Eckdahl et al., Science Advances (2026). Reconstructing emissions from 324 Swedish wildfires, the team found global fire models underestimate carbon released from smoldering peat by up to 50 percent overall, and up to 14-fold in peat-rich areas where fires burn underground and evade satellite detection.

Why does scale matter here?

Boreal soils hold more carbon than the atmosphere. A 50 percent undercount means global carbon budgets may need substantial revision.

What's next?

Eckdahl is adapting these ground-truth methods to Western U.S. forests with UC Berkeley collaborators. No results published yet.

Northern Hemisphere Fish Biomass in Long-Term Decline, Masked by Heatwave Surges

Nature Ecology & Evolution (2026). Analyzing over 700,000 biomass estimates across 33,990 populations, researchers found sustained warming drives annual fish biomass declines up to 19.8 percent. Short-term heatwave-driven surges at cold-range edges create transient abundance spikes that obscure the chronic loss underneath.

Where's the management risk?

Fishery quotas raised during heatwave-driven biomass spikes may accelerate collapse once temperatures normalize. The signal misleads the instrument.

What's unresolved?

External reviewers note the study's models may not fully disentangle warming effects from overfishing as a co-driver.

Global Ocean Heat Content Reached Record Highs Again in 2025

Advances in Atmospheric Sciences (early 2026). The annual ocean heat content analysis confirmed 2025 set another record, extending a pattern in which each successive year absorbs more thermal energy than models from even a few years prior anticipated. Deep-ocean warming, poorly captured by existing monitoring arrays, accounts for a growing share.

Why does depth matter?

Monitoring infrastructure is concentrated in the upper ocean. Heat accumulating below measurement thresholds goes functionally uncounted.

What does this drive?

Ocean heat content governs sea-level rise, storm intensification, and marine ecosystem stress with multi-decadal lag times.

Ice Sheet Mass Loss Is Measurably Altering Earth's Rotation

Journal of Geophysical Research (2025–2026). Accelerating ice loss from Greenland and Antarctica is redistributing enough planetary mass to produce detectable changes in Earth's rotation and polar drift, a geophysical signal that independently confirms ice melt is outpacing the rates embedded in current sea-level projections.

Why does rotation matter?

Rotational changes serve as an independent check on ice-loss estimates, and they're confirming the models have been conservative.

What's the implication?

Sea-level rise projections built on slower melt rates may systematically understate the timeline communities are planning against.

The Research

Boreal Wildfire Carbon Emissions Underestimated by Up to 50 Percent

Eckdahl et al., Science Advances (2026). Reconstructing emissions from 324 Swedish wildfires, the team found global fire models underestimate carbon released from smoldering peat by up to 50 percent overall, and up to 14-fold in peat-rich areas where fires burn underground and evade satellite detection.

Why does scale matter here?

Boreal soils hold more carbon than the atmosphere. A 50 percent undercount means global carbon budgets may need substantial revision.

What's next?

Eckdahl is adapting these ground-truth methods to Western U.S. forests with UC Berkeley collaborators. No results published yet.

The Research

Northern Hemisphere Fish Biomass in Long-Term Decline, Masked by Heatwave Surges

Nature Ecology & Evolution (2026). Analyzing over 700,000 biomass estimates across 33,990 populations, researchers found sustained warming drives annual fish biomass declines up to 19.8 percent. Short-term heatwave-driven surges at cold-range edges create transient abundance spikes that obscure the chronic loss underneath.

Where's the management risk?

Fishery quotas raised during heatwave-driven biomass spikes may accelerate collapse once temperatures normalize. The signal misleads the instrument.

What's unresolved?

External reviewers note the study's models may not fully disentangle warming effects from overfishing as a co-driver.

The Research

Global Ocean Heat Content Reached Record Highs Again in 2025

Advances in Atmospheric Sciences (early 2026). The annual ocean heat content analysis confirmed 2025 set another record, extending a pattern in which each successive year absorbs more thermal energy than models from even a few years prior anticipated. Deep-ocean warming, poorly captured by existing monitoring arrays, accounts for a growing share.

Why does depth matter?

Monitoring infrastructure is concentrated in the upper ocean. Heat accumulating below measurement thresholds goes functionally uncounted.

What does this drive?

Ocean heat content governs sea-level rise, storm intensification, and marine ecosystem stress with multi-decadal lag times.

The Research

Ice Sheet Mass Loss Is Measurably Altering Earth's Rotation

Journal of Geophysical Research (2025–2026). Accelerating ice loss from Greenland and Antarctica is redistributing enough planetary mass to produce detectable changes in Earth's rotation and polar drift, a geophysical signal that independently confirms ice melt is outpacing the rates embedded in current sea-level projections.

Why does rotation matter?

Rotational changes serve as an independent check on ice-loss estimates, and they're confirming the models have been conservative.

What's the implication?

Sea-level rise projections built on slower melt rates may systematically understate the timeline communities are planning against.

Below the Surface

Satellites Can't See What Burns Underground. Western Fire Communities Are Planning Around That Blind Spot.

A February study in Science Advances found that underground peat combustion, invisible to satellites, caused Sweden's 2018 fire emissions to be underestimated by up to 50 percent. In some counties, fourteenfold. Lead researcher Johan Eckdahl, based at Lund University and UC Berkeley, is now adapting the methodology to Western US forests through the Western Fire & Forest Collaborative. No American results are published yet.

But the structural problem doesn't wait for publication. Every evacuation simulation, insurance catastrophe model, and community wildfire protection plan across Colorado's Front Range, the Sierra Nevada, and the Pacific Northwest relies on satellite-derived fire behavior data. The Swedish findings suggest those tools are partially blind to slow, persistent ground-level burning. If that blindness translates to Western soils, the assessments millions of people depend on are reading an incomplete fire.

Below the Surface

Satellites Can't See What Burns Underground. Western Fire Communities Are Planning Around That Blind Spot.

A February study in Science Advances found that underground peat combustion, invisible to satellites, caused Sweden's 2018 fire emissions to be underestimated by up to 50 percent. In some counties, fourteenfold. Lead researcher Johan Eckdahl, based at Lund University and UC Berkeley, is now adapting the methodology to Western US forests through the Western Fire & Forest Collaborative. No American results are published yet.

But the structural problem doesn't wait for publication. Every evacuation simulation, insurance catastrophe model, and community wildfire protection plan across Colorado's Front Range, the Sierra Nevada, and the Pacific Northwest relies on satellite-derived fire behavior data. The Swedish findings suggest those tools are partially blind to slow, persistent ground-level burning. If that blindness translates to Western soils, the assessments millions of people depend on are reading an incomplete fire.

Insurance exposure:

California's FAIR Plan ballooned to $433 billion by 2024, with regulators already conceding that historical fire data can't support accurate pricing.

Soil distinction:

Western forests lack Sweden's deep peat, but Pacific Northwest research confirms wildfires reach soil carbon through root channels and organic hotspots.

Evacuation modeling:

Colorado's Front Range simulations project worst-case fire spread from above-ground fuels, with no accounting for smoldering persistence underground.

Regulatory gap:

California is building the nation's first public wildfire catastrophe model. Underground soil combustion isn't part of the conversation yet.

Field reality:

"We need to combine satellite overviews with field work," Eckdahl says. Calibrating these models means digging holes, not reading pixels.

Keep Reading

Scientists Detect a Sudden Acceleration in Global Warming

PIK researchers filtered natural variability from five temperature datasets and found the warming rate has nearly doubled since 2015. ScienceDaily, March 9, 2026.

Study Ties Particle Pollution From Wildfire Smoke to 24,100 US Deaths Per Year

The mortality estimate alone is staggering, but the real finding is that wildfire-sourced PM2.5 remains completely unregulated by the EPA. STAT News, February 4, 2026.

We May Be Underestimating the True Carbon Cost of Northern Wildfires

Climate Change Is Accelerating but Nature Is Slowing Down

Keep Reading

Scientists Detect a Sudden Acceleration in Global WarmingPIK researchers filtered natural variability from five temperature datasets and found the warming rate has nearly doubled since 2015. ScienceDaily, March 9, 2026.

Study Ties Particle Pollution From Wildfire Smoke to 24,100 US Deaths Per YearThe mortality estimate alone is staggering, but the real finding is that wildfire-sourced PM2.5 remains completely unregulated by the EPA. STAT News, February 4, 2026.

Quick links

We May Be Underestimating the True Carbon Cost of Northern Wildfires

Climate Change Is Accelerating but Nature Is Slowing Down

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