Millennial-scale ocean climate variability
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 perio...
Main Authors: | , |
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Other Authors: | , , |
Format: | Book Part |
Language: | English |
Published: |
Elsevier
2020
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Subjects: | |
Online Access: | http://hdl.handle.net/10400.1/14131 https://doi.org/10.1016/b978-0-12-409548-9.11368-5 |
Summary: | 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 |
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