The Arctic’s Rusting Rivers: Why Streams Are Turning Orange
The Arctic’s Rusting Rivers: Why Climate Change Is Turning Streams Orange Photo: Josh Koch, U.S. Geological Survey (Public Domain) In some remote parts of Arctic Alaska , rivers that once ran clear are now turning a surprising shade of orange. At first, the color looks almost unreal, as if something toxic has spilled into the water. But many of these streams are far away from cities, factories, or mining sites. That is what makes this change so striking. Scientists say the cause is not ordinary pollution — it is closely linked to climate change . The story begins with permafrost , the layer of ground that stays frozen for years. Across much of the Arctic, permafrost has acted like a natural seal, locking water, minerals, and old organic material beneath the surface. For a long time, those buried materials stayed frozen and mostly undisturbed. But now, as Arctic temperatures rise faster than in many other parts of the world, that frozen ground is starting to thaw. When permafrost mel...