polynyas in A Sentence

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    Some Polynyas such as those between Canada and Greenland form in the same places every year and time.

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    The presence of Polynyas is also important in the Arctic as they provide the grounds that are free of ice where the Penguins can feed.

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    Large and long-lasting Polynyas can also affect the atmosphere, because deep water contains carbon from lifeforms that have sunk over centuries and dissolved on their way down.

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    Right now people think most of the bottom water is forming on the Antarctic shelf, but these big offshore Polynyas might have been more common in the past,” Riser says.

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    Right now people think most of the bottom water is forming on the Antarctic shelf, but these big offshore Polynyas might have been more common in the past,” Riser said.

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    Driven by climate change, fresh water from melting glaciers and other sources is expected to make the Southern Ocean's surface layer less dense, which might mean fewer Polynyas in the future.

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    However, in some instances, very strong winds blow from the land into the sea pushing away patches of ice from the coast and in the process creating the open water that are called Polynyas.

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    The biggest known Polynyas at that location were in 1974, 1975 and 1976, just after the first satellites were launched, when an area the size of New Zealand remained ice-free through three consecutive Antarctic winters despite air temperatures far below freezing.

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