Tributary of Salmon River, Kobuk Valley National Park, Alaska
Tributary of Salmon River located in the Kobuk Valley National Park, Alaska. Recent observations from Arctic Alaska indicate that waters draining permafrost landscapes may be susceptible to iron and carbon mobilization following thaw. One consequence of these altered iron-cycling processes is the abrupt change in color (orange) of stream and river reaches, reflecting a dramatic shift in water quality.
Photo by Michael Carey, U.S. Geological Survey