Arctic Permafrost Thaw Creates "Leaky" Soils, Increasing Gas Permeability up to 100-Fold

University of Leeds study finds thawing permafrost releases greenhouse gases 100 times faster than expected, potentially accelerating the global climate crisis.

By: AXL Media

Published: Apr 6, 2026, 11:00 AM EDT

Source: Information for this report was sourced from Earth.com

The Sudden Failure of the Arctic’s Frozen Lid

For millennia, the Arctic permafrost has functioned as a frozen containment system, trapping vast reserves of carbon-rich organic matter beneath a layer of ice. New experimental data from the University of Leeds suggests this "lid" is becoming significantly more porous as global temperatures rise. The study indicates that as the ground thaws, it undergoes a structural reorganization that makes it dramatically more "leaky," allowing gases like methane and carbon dioxide to move through the soil with far less resistance than when the ground remains fully frozen.

Quantifying the Surge in Soil Permeability

The research team conducted controlled experiments within the Leeds Petrophysics Laboratory to measure the movement of gases through model permafrost samples. By gradually warming these samples from -18°C to +5°C, scientists discovered that the soil’s permeability increases by 25 to 100 times during the transition. This physical shift means that the Arctic doesn't just become a larger source of greenhouse gases as it warms; it becomes a significantly faster one, potentially outstripping current climate modeling projections.

Critical Thresholds Near the Freezing Point

A key finding of the study is that the increase in gas flow is not a linear process. The most intense changes in permeability were recorded in a narrow temperature window between -5°C and 1°C. According to Paul Glover, the Chair of Petrophysics at the University of Leeds, this is the specific zone where permafrost begins to soften and crack. Because large portions of the Arctic Circumpolar Permafrost Region (ACPR) currently hover near these temperatures, even a one-degree increase in regional warming could produce a disproportionately large jump in gas emissions.