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Brief Communications
Nature 432, 460 (25 November 2004) | doi:10.1038/432460a; Published online 24 November 2004
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Palaeoclimate: Ocean tides and Heinrich events
Brian K. Arbic1, Douglas R. MacAyeal2, Jerry X. Mitrovica3 & Glenn A. Milne4
Abstract
Climate varied enormously over the most recent ice age1 — for example, large pulses of ice-rafted debris2, originating mainly from the Labrador Sea3, were deposited into the North Atlantic at roughly 7,000-year intervals, with global climatic implications3. Here we show that ocean tides within the Labrador Sea were exceptionally large over the period spanning these huge, abrupt ice movements, which are known as Heinrich events. We propose that tides played a catalytic role in liberating iceberg armadas during that time.
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RESEARCH
Possible triggering of Heinrich events by ice-load-induced earthquakesNature Letters to Editor (14 May 1998)
Irregular oscillations of the West Antarctic ice sheetNature Article (03 Sep 1992)
