oceans

A woman in a dark coat and pants stands on the deck of a boat, with a view of the ocean in the background.

What ancient sediments at the bottom of the ocean can teach us about climate change

Archives 2025, Global warming, Oceans, Slider Stories, Top Stories / By

By Rachel Duckett, Dec. 20, 2025 Columbia University researchers are using grains of sediment left behind on the ocean floor millions of years ago to track the movement of icebergs through the Southern Ocean’s “Iceberg Alley,” just east of the Drake Passage between the southern tip of South America and Antarctica. As icebergs broke off …

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Diagram showing how floating robot instruments track metrics in the sea.

Oceanographer Lynne Talley sounds alarm on rising seas

Extreme weather, Global warming, Health and Environment, Oceans, Top Stories / By

By Jack Austin and Kimberly Henrickson, Nov. 12, 2025 As global temperatures climb and seas continue to rise, oceanographer Lynne Talley warns that the accelerating melt of Antarctic ice threatens to erase entire island nations within decades. From her long-term research in the Southern Ocean, Talley has traced how warming waters and shifting circulation patterns …

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