Rivers in Alaska and Yukon are Warming
Researchers at the Institute of Arctic and Alpine Research at the University of Colorado Boulder have found that the North, including Alaska and the Yukon, is warming faster than the rest of the world due to climate change.
A recent study examined the temperature of several rivers, including the Porcupine, Teedriinjik, Aniak, Andreafsky, Koyukuk, Takotna, and Chena. The study found that the warming of the Porcupine River may limit the growth of Chinook salmon.
The warming in the Porcupine River may be enough to limit the growth of Chinook salmon based on the frequency of days and river length which will warm to the upper limit of the temperature range for individual growth.
The Porcupine River flows into the Yukon River at Fort Yukon in Alaska and eventually into the Bering Sea. Salmon migrate from freshwater to sea and back to spawn, and changes in river temperatures may affect their growth and survival.
Author's summary: Climate change affects salmon growth in Alaska and Yukon rivers.