Arctic algae crusts preserve climate data

By Ashley Yeager, 16:43 PM November 18, 2013

Thick-crusted algae living on the seafloor of the Arctic Ocean hold 650 years' worth of data on sea-ice cover.

A new study analyzing the crusty records of the Arctic algae Clathromorphum compactum shows that sea-ice coverage in the Arctic, North Atlantic and North Pacific has been declining steadily since 1850. The underwater record also reveals that the 20th century had the lowest sea-ice cover of the last 646 years, researchers report November 18 in the Proceedings of the National Academy of...

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