Published on 29 Mar 2025
• As the Arctic permafrost thaws due to climate change, large amounts of toxic mercury, known as the Mercury bomb, are being released.
• Permafrost is permanently frozen ground that remains at or below 0°C (32°F) for at least two consecutive years.
• Permafrost covers 25% of the Northern Hemisphere’s exposed land.
• Mercury is liberated during glacial erosion, with some being redeposited by rivers.
• Finer sediments contain higher mercury levels.
• While the immediate threat is minimal, the mercury could gradually accumulate in the food chain, posing long-term risks, particularly to Arctic communities
Mercury Bomb
climate change
cryosphere
permafrost
Arctic
Bioaccumulation
BOD