Melting permafrost changes Yukon River

Ice fog on the Yukon River (Creative commons photo by Anthony DeLorenzo)A new study shows melting permafrost is changing the chemistry of the Yukon River, just one of many climate-related changes affecting the Yukon and beyond.
Hydrologist Ryan Toohy with the USGS Alaska Climate Science Center said researchers tested water samples collected from the Yukon and Tanana rivers over a period of thirty years. The results show that as upper layers of the permafrost freeze later and melt earlier in the