The heartbeat of the Oligocene climate system

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doi: 10.1126/science.1133822
Author(s): Palike, Heiko; Norris, Richard D.; Herrle, Jens O.; Wilson, Paul A.; Coxall, Helen K.; Lear, Caroline H.; Shackleton, Nicholas J.; Tripati, Aradhna K.; Wade, Bridget S.
Author Affiliation(s): Primary:
National Oceanography Centre, School of Ocean and Earth Science, Southampton, United Kingdom
Scripps Institution of Oceanography, United States
Cardiff University, United Kingdom
University of Cambridge, United Kingdom
Rutgers, State University of New Jersey, United States
Volume Title: Science
Source: Science, 314(5807), p.1894-1898. Publisher: American Association for the Advancement of Science, Washington, DC, United States. ISSN: 0036-8075 CODEN: SCIEAS
Note: In English. 44 refs.; illus.
Summary: A 13-million-year continuous record of Oligocene climate from the equatorial Pacific reveals a pronounced "heartbeat" in the global carbon cycle and periodicity of glaciations. This heartbeat consists of 405,000-, 127,000-, and 96,000-year eccentricity cycles and 1.2-million-year obliquity cycles in periodically recurring glacial and carbon cycle events. That climate system response to intricate orbital variations suggests a fundamental interaction of the carbon cycle, solar forcing, and glacial events. Box modeling shows that the interaction of the carbon cycle and solar forcing modulates deep ocean acidity as well as the production and burial of global biomass. The pronounced 405,000-year eccentricity cycle is amplified by the long residence time of carbon in the oceans.
Year of Publication: 2006
Research Program: ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 12 Stratigraphy, Historical Geology and Paleoecology; Biomass; C-13/C-12; Calcium carbonate; Carbon; Carbon cycle; Cenozoic; Climate change; Climate forcing; Eccentricity; Equatorial Pacific; Geochemical cycle; Geochemistry; Isotope ratios; Isotopes; Leg 199; O-18/O-16; ODP Site 1218; Ocean Drilling Program; Oligocene; Orbital forcing; Oxygen; Pacific Ocean; Paleoclimatology; Paleogene; Reconstruction; Stable isotopes; Tertiary
Coordinates: N085300 N085300 W1352200 W1352200
Record ID: 2007028755
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute.