Millennial-scale ocean climate variability

• Main Authors: Voelker, Antje, Andrews, John T.
• Other Authors: Cochran, J. Kirk, Bokuniewicz, Henry J., Yager, Patricia L.
• Format: Book Part
• Language: English
• Published: Elsevier 2020
• Subjects: Heinrich events; Abrupt climate change; Greenland interstadials; Greenland stadials; Dansgaard-Oeschger events; Last glacial cycle; Marine Isotope Stage 3; Greenland; Hudson; Hudson Strait; Ice Sheet; North Atlantic
• Online Access: http://hdl.handle.net/10400.1/14131; https://doi.org/10.1016/b978-0-12-409548-9.11368-5

Marine sediment cores that span the last 50,000 years frequently show considerable variability in sediment and biogeochemical variables. In the North Atlantic, a series of massive iceberg and meltwater events (Heinrich events) were sourced from Hudson Strait and the Laurentide Ice Sheet with a periodicity of ~7.2 ky and had significant impacts on the Atlantic meridional overturning circulation and the global hydrological and biogeochemical cycles. Some marine proxies show higher frequency, abrupt events, that may match the Dansgaard-Oeschger (D-O) oscillations. Predictable millennial-scale periodicities and associated forcings have proved elusive, and an observed ~1.5 ky cycle may be linked to stochastic resonance. 01500/2014, 04326/2020 info:eu-repo/semantics/publishedVersion