Greenland Ice Melt Could Release Vast Methane Stores, Study Warns

New research indicates that melting glaciers in Greenland could release significant amounts of methane, a potent greenhouse gas, by destabilizing underground methane hydrates known as 'fire ice.' Scientists from the University of Manchester analyzed seismic surveys and sediment cores from Melville Bay, discovering deep pockmarks on the seafloor created during the last glacial maximum. These features were formed when meltwater flushed out frozen methane hydrates from sediments at the edge of the ice sheet. The study challenges previous assumptions that these methane stores were stable, revealing a new mechanism for release driven by glacial retreat. Lead researcher Mads Huuse warns that similar processes could occur in the near future as climate change accelerates ice melt across the Arctic. While the exact volume of past releases is uncertain, estimates suggest up to 130 million tonnes of methane may have been emitted in Melville Bay alone. With polar regions holding billions of tonnes of methane in subglacial and marine hydrates, this phenomenon poses a serious risk of amplifying global warming if triggered by receding ice sheets in Greenland and potentially Antarctica.