Jennifer-Anne Pascoe: The World's Largest High Arctic Lake Changes

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A 1 C increase in temperature has set off a chain of events disrupting the entire ecology of the world’s largest High Arctic lake. “The amount of glacial meltwater going into the lake has dramatically increased,” said Martin Sharp, a University of Alberta glaciologist who was part of a team of scientists that documented the rapid changes in Lake Hazen on Ellesmere Island over a series of warm summers in the last decade.

“Because it’s glacial meltwater, the amount of fine sediment going into the lake has dramatically increased as well. That in turn affects how much light can get into the water column, which may affect biological productivity in the lake.”

The changes resulted in algal blooms and detrimental changes to the Arctic char fish population, and point to a near certain future of summer ice-free conditions.