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Tidal forcing as a trigger of ice stream deglaciation

Ice streams are fast-moving "rivers" of ice that drain terrestrial ice sheets. In the deglacial sequence which occurred between Last Glacial Maximum and modern-day, several rapid climate transitions occurred. They are in chronological order: Heinrich Event 1, the Bolling Allerod warming, the onset of the Younger Dryas (YD), and the rapid end of the YD. H1 is known to have been caused by an ice stream instability in the Hudson Strait, and recent work has suggested that high amplitude tides may have caused and subsequently forced the rapid disintegration of the ice sheet which existed in the Hudson Strait. The ice sheet which existed in the modern-day Amundsen Gulf may have also been amenable to a tidally triggered destabilization, initiated by the Bolling-Allerod warming. After this initial partial deglaciation, a significant amplification of the tides in the Amundsen Gulf forced the rapid disintegration of the ice stream, clearing the route through which glacial meltwater later entered the Arctic Ocean initiating the YD.

Event series  Brewer-Wilson Seminar Series