Forcing of Atlantic Equatorial and Subpolar Millennial Cycles by Precession

TitleForcing of Atlantic Equatorial and Subpolar Millennial Cycles by Precession
Publication TypeJournal Article
Year of Publication1996
AuthorsMcIntyre A., Molfino B.
JournalScience
Volume274
Issue5294
Pagination1867-70
Date PublishedDec 13
ISBN Number1095-9203 (Electronic)0036-8075 (Linking)
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.

URLhttps://www.ncbi.nlm.nih.gov/pubmed/8943191
DOI10.1126/science.274.5294.1867