Climate change is leading to lakes becoming less blue, with many at risk of permanently turning green-brown, a new study has found. Conducted by the American Geophysical Union, the study presents the first “global inventory of the lake colour,” and takes into account changes in water colour to determine water quality. While a specific time frame wasn’t offered, researchers said that one in 10 lakes can expect to change colour in “the future.”
Why the North Saskatchewan River has gone from brown to blue
The North Saskatchewan River looks less like chocolate milk than usual. The clear, aquamarine waters have revealed hidden sandbars, darting fish, submerged shopping carts — and a flood of questions from Edmontonians seeking clarity on the colour change. The river, which starts at the Saskatchewan Glacier in the Columbia Icefields in Alberta and flows through to central Saskatchewan, is usually a murky brown by the time it reaches Edmonton in summer.