(Table S1) Age determination of ODP Site 165-1002

A series of 14C measurements in Ocean Drilling Program cores from the tropical Cariaco Basin, which have been correlated to the annual-layer counted chronology for the Greenland Ice Sheet Project 2 (GISP2) ice core, provides a high-resolution calibration of the radiocarbon time scale back to 50,000...

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Bibliographic Details
Main Authors: Hughen, Konrad A, Lehman, Scott J, Southon, John R, Overpeck, Jonathan T, Marchal, Olivier, Herring, C, Turnbull, J
Format: Dataset
Language:English
Published: PANGAEA 2004
Subjects:
165-1002
Age
14C AMS
14C milieu/reservoir corrected
dated
dated material
dated standard deviation
Calendar age
standard deviation
Cayman Rise
Caribbean Sea
Comment
COMPCORE
Composite Core
DEPTH
sediment/rock
Joides Resolution
Leg165
Ocean Drilling Program
ODP
Sample code/label
Δ14C
Greenland
Greenland Ice Sheet Project
ice core
Ice Sheet
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.772071
https://doi.org/10.1594/PANGAEA.772071
Description
Summary:A series of 14C measurements in Ocean Drilling Program cores from the tropical Cariaco Basin, which have been correlated to the annual-layer counted chronology for the Greenland Ice Sheet Project 2 (GISP2) ice core, provides a high-resolution calibration of the radiocarbon time scale back to 50,000 years before the present. Independent radiometric dating of events correlated to GISP2 suggests that the calibration is accurate. Reconstructed 14C activities varied substantially during the last glacial period, including sharp peaks synchronous with the Laschamp and Mono Lake geomagnetic field intensity minimal and cosmogenic nuclide peaks in ice cores and marine sediments. Simulations with a geochemical box model suggest that much of the variability can be explained by geomagnetically modulated changes in 14C production rate together with plausible changes in deep-ocean ventilation and the global carbon cycle during glaciation.

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