Fire Ice Under Greenland Exploded. Polar Ice Sheets,Take Note.

Beneath the northwest coast of Greenland, researchers pulling up sediment cores made a discovery that should not be possible: the methane was gone. Not diminished. Gone. And in its place: 50 craters, some as deep as 37 meters (121 feet), punched into the seafloor like something had exploded from below.

It had.

Methane hydrate forms when gas molecules become trapped within a cage of frozen water molecules, creating what looks like ice and is often called "fire ice." Roughly 1,800 gigatons of methane sit locked in gas hydrates beneath continental margins and permafrost, making them one of the largest methane reservoirs in the global carbon cycle. Destabilization was thought to occur mainly through slow shifts in temperature or pressure. The new findings show that meltwater-driven dissolution can rapidly destabilize hydrates even inside gas hydrate stability zones, formations previously considered safe storage.

The evidence was in the sediment cores drilled offshore in northwest Greenland. Methane concentrations in layers where hydrates should have been abundant were unexpectedly low. Chemical analysis of the pore water showed freshwater signatures instead of seawater, the residue of a meltwater pulse that flushed the system clean. The pockmarks had originally been logged by oil and gas surveys as curiosities, possibly caused by icebergs dragging across the seafloor. IODP drilling ruled that out. The craters were blown from below.

The findings, published in Nature Geoscience, suggest this mechanism may have contributed to past climate events and could factor into future warming as polar ice sheets continue to retreat. The research does not predict an imminent release. It shows that seafloor under a retreating ice sheet can shed its methane quickly, leaving pockmarks as the only record. Near-term timing remains uncertain.

The Earth filed the incident report 12,000 years ago. We just learned to read it.

Read the full story at New Scientist, May 2026

Hot Take: Every climate model running right now is missing this mechanism entirely, and the planet has already demonstrated exactly what it can do with it.