Cariaco Basin 50KYr Radiocarbon Calibration and Reconstruction
Entry ID: NOAA_NCDC_PALEO-2004-006

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Summary
Abstract: Cariaco Basin 50KYr Radiocarbon Calibration and Reconstruction.
Accelerator Mass Spectrometry (AMS) 14C data from planktonic
foraminifera from Ocean Drilling Program Site 1002, cores 1002D and
1002E, Cariaco Basin (10 deg. 42.73'N, 65 deg. 10.18'W, 893m. depth)

ABSTRACT (from the online documentation):
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.

This work was supported by NSF (OCE-0117356), Lawrence Livermore
National Laboratory (LDRD-97-ERI-009), and the U.S. Department of
Energy (W-7405-Eng-48).

Related URL
Link: GET DATA
Description: Access to data and documentation


Geographic Coverage
 N: 42.73 S: 42.73  E: -10.18  W: -10.18
 Min Depth: 0 M  Max Depth: 893 M

Data Set Citation
Dataset Originator/Creator: Hughen, K., S. Lehman, J. Southon, J. Overpeck, O. Marchal, C. Herring, and J. Turnbull
Dataset Title: Cariaco Basin 50KYr Radiocarbon Calibration and Reconstruction
Dataset Series Name: IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2004-006
Dataset Release Date: February 2004
Dataset Release Place: Boulder, CO
Dataset Publisher: NOAA/NGDC Paleoclimatology Program
Issue Identification: 2004-006
Online Resource: http://www.ncdc.noaa.gov/paleo/pubs/hughen2004/hughen2004.html


Paleo_Temporal_Coverage
Paleo Start Date: 50 ka
Paleo Stop Date: 0 ka
Chrono Unit:


Location Keywords
OCEAN > ARCTIC OCEAN
OCEAN > ATLANTIC OCEAN
GEOGRAPHIC REGION > POLAR


Science Keywords
OCEANS >OCEAN CHEMISTRY >CARBON    [Definition]
OCEANS >OCEAN CHEMISTRY >RADIOCARBON    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >ISOTOPES    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >MICROFOSSILS    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >RADIOCARBON    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >SEDIMENTS    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >STRATIGRAPHIC SEQUENCE    [Definition]
BIOLOGICAL CLASSIFICATION >PROTISTS >AMOEBOIDS >FORAMINIFERS    [Definition]


ISO Topic Category
BIOTA
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
GEOSCIENTIFIC INFORMATION
OCEANS


Platform
SHIPS    [Information]


Instrument
SEDIMENT CORERS    [Information]


Project
PAGES >Past Global Changes, IGBP    [Information]


Keywords
foraminifers
Cariaco Basin
Carbon 14
14C
bulloides
radiocarbon time scale
reconstructions
carbon cycle


Data Set Progress
COMPLETE


Originating Center
NOAA/NCDC


Data Center
World Data Center for Paleoclimatology, Boulder    [Information]
Data Center URL: http://www.ncdc.noaa.gov/paleo/

Data Center Personnel
Name: WDC/PALEOCLIMATOLOGY, BOULDER
Phone: +1 (303) 497-6160
Fax: +1 (303) 497-6513
Email: paleo at noaa.gov
Contact Address:
World Data Center for Paleoclimatology
NOAA/NCDC Code E/GCx3
325 Broadway
City: Boulder
Province or State: CO
Postal Code: 80303
Country: USA



Distribution
Distribution_Media: online ftp, www
Distribution_Format: ascii, excel
Fees: none


Personnel
KONRAD A. HUGHEN
Role: INVESTIGATOR
Phone: (508) 289-3353
Email: khughen at whoi.edu
Contact Address:
Woods Hole Oceanographic Institution
City: Woods Hole
Province or State: MA
Postal Code: 02543
Country: USA


SCOTT J. LEHMAN
Role: INVESTIGATOR
Contact Address:
Institute of Arctic and Alpine Research
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309
Country: USA


JOHN SOUTHON
Role: INVESTIGATOR
Contact Address:
Earth System Science
University of California
City: Irvine
Province or State: California
Postal Code: 92697-3100
Country: USA


JONATHAN T. OVERPECK
Role: INVESTIGATOR
Email: jto at email.arizona.edu
Contact Address:
Institute of the Environment
Department of Geosciences
University of Arizona
City: Tucson
Province or State: AZ
Postal Code: 85721-0077
Country: USA


O. MARCHALL
Role: INVESTIGATOR
Contact Address:
Department of Geology and Geophysics
Woods Hole Oceanographic Institution
City: Woods Hole
Province or State: MA
Postal Code: 02543
Country: USA


C. HERRING
Role: INVESTIGATOR
Contact Address:
Department of Marine Chemistry and Geochemistry
Woods Hole Oceanographic Institution
City: Woods Hole
Province or State: MA
Postal Code: 02543
Country: USA


J. TURNBULL
Role: INVESTIGATOR
Contact Address:
Institute of Arctic and Alpine Research
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309
Country: USA


Publications/References
Hughen, K., S. Lehman, J. Southon, J. Overpeck, O. Marchal,
C. Herring, and J. Turnbull. 2004. 14C Activity and Global Carbon
Cycle Changes over the Past 50,000 Years. Science, Volume 303, Number
5655, 9 January 2004.

Creation and Review Dates
DIF Creation Date: 2004-03-15
Last DIF Revision Date: 2012-10-18

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