Science Keywords>BIOLOGICAL CLASSIFICATION
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Cariaco Basin 50KYr Radiocarbon Calibration and Reconstruction Entry ID: NOAA_NCDC_PALEO-2004-006 |
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Summary
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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
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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
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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
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Paleo Start Date:
50 ka
Paleo Stop Date: 0 ka Chrono Unit: |
Location Keywords
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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
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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
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World Data Center for Paleoclimatology, Boulder
[Information]
Data Center URL: http://www.ncdc.noaa.gov/paleo/
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Distribution
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Distribution_Media:
online ftp, www
Distribution_Format: ascii, excel Fees: none |
Personnel
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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 |
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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 |
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JOHN
SOUTHON Role: INVESTIGATOR Contact Address: Earth System Science University of California City: Irvine Province or State: California Postal Code: 92697-3100 Country: USA |
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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 |
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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 |
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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 |
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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 |
Creation and Review Dates
Last DIF Revision Date:
2012-05-14
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