🟠 Why are some rivers in Alaska turning bright orange?
Beneath Alaska’s frozen landscape lies permafrost—ground that has remained frozen for years, decades, or even thousands of years.
🌡️ As temperatures rise, thawing permafrost exposes previously frozen minerals and metals to water and oxygen. This can release metals, increase acidity in some rivers, and change water chemistry—even far downstream.
🌊 These changes may affect aquatic ecosystems and the organisms that depend on them.
In this video, discover:
🧊 What permafrost is and why it matters
🧪 How thawing ground can release metals and acidity
🟠 Why some rivers develop a rusty-orange colour
🌿 How changing river chemistry can affect ecosystems
🌍 The Geoecologist — Learn Geography. Understand the World.
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