Forcing of Atlantic Equatorial and Subpolar Millennial Cycles by Precession
- 13 December 1996
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 274 (5294) , 1867-1870
- https://doi.org/10.1126/science.274.5294.1867
Abstract
Abundance cycles of the marine alga Florisphaera profunda centered on a period of 7600 carbon-14 years (8400 calendar years) are present in high-resolution records from the equatorial Atlantic spanning 0 to 45,000 years ago. These cycles correlate with Heinrich events 1 through 5, which document rapid changes in continental ice melting around the subpolar North Atlantic. These variations in F. profunda are a direct response to modulation in zonal wind-driven divergence produced by a precessional component of orbital variation during a time of reduced eccentricity modulation.Keywords
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