Osmosis Drives Explosions and Methane Release in Siberian Permafrost

2023/08/11 by Ana M. O. Morgado, Luis A. M. Rocha, Luís A. M. Rocha +2 · 1 voice · 1 citation
Environmental Science · Earth and Planetary Sciences · #Methane Hydrates and Related Phenomena #Climate change and permafrost #Atmospheric and Environmental Gas Dynamics

paper · pdf · doi:10.1029/2024gl108987

Abstract

Abstract Mysterious craters, with anomalously high concentrations of methane, have formed in the Yamal and Taymyr peninsulas of Siberia since 2014. While thawing permafrost owing to climate warming promotes methane releases, it is unknown how such release might be associated with explosion and crater formation. A significant volume of surface ice‐melt water can migrate downward driven by osmotic pressure associated with a cryopeg, a lens of salty water below. Overpressure reached at depth may lead to the cracking of the soil and subsequent decomposition of methane hydrates, with implications for the climate.

Cited by

• A Review of Abrupt Permafrost Thaw: Definitions, Usage, and a Proposed Conceptual Framework

Discussions

• 🧪 The worst case could now happen in the Arctic permafrost soils - warming groundwater is melting cracks open to natural gas-rich sediment layers via osmosis - we observe methane emissions from therm [bsky, 14 points, 2 comments]

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