EventA 2024 study shows Arctic permafrost thaw in Alaska’s Brooks Range is releasing acidic water bearing iron, zinc, manganese and other metals—up to 70 × greater than normal—into rivers, with streams as acidic as mine drainage. The event followed a record summer and heavy snowpack, and similar leaks are now documented in more than 200 rivers across North America’s permafrost zone.
Scientists find that thawing permafrost in Alaska’s Brooks Range is releasing metals into rivers, with some sites showing concentrations 70 times higher than normal, raising concerns about impacts on ecosystems and Native communities.
Thawing permafrost in Arctic Alaska is turning rivers orange and elevating metal levels up to 64 miles downstream, raising concerns for fish and water quality.
Researchers found that thawing tundra in northern Alaska is creating acidic, metal‑rich waters—‘rusting’ rivers up to 70 times more corrosive than mine drainage—raising concerns for Salmon populations.
