Science, Space and Technology News 2024
An aerial view of the rust-colored Kutuk River in Gates of the Arctic National Park in Alaska. Thawing permafrost is exposing minerals to weathering, increasing the acidity of the water, which releases metals like iron, zinc and copper. Credit: Ken Hill / National Park ServiceIn Alaska, numerous remote streams and rivers are shifting from their natural crystal-clear blue to an unsettling cloudy orange.
“The stained rivers are so big we can see them from space,” said Brett Poulin, an assistant professor of environmental toxicology at UC Davis who was a principal investigator in the research. “These have to be stained a lot to pick them up from space.” Poulin, who specializes in water chemistry, said the staining resembled the effects ofResearchers hypothesize that as the climate warms, permafrost thaws.
The problem is growing and affecting habitat, water quality, and other ecological systems, turning healthy areas into degraded habitats with fewer fish and. If rural communities rely on these rivers for drinking water, they could require treatment eventually, and the fishing stocks that feed local residents could be affected.
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