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Gulf of Guinea MD03-2707 d18O, Ba/Ca, and Mg/Ca Data and SST/West African Monsoon Reconstruction
Entry ID: NOAA_NCDC_PALEO_2007-067

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Summary
Abstract: A detailed reconstruction of West African monsoon hydrology over the
past 155,000 years suggests a close linkage to northern high-latitude
climate oscillations. Ba/Ca ratio and oxygen isotope composition of
planktonic foraminifera in a marine sediment core from the Gulf of
Guinea, in the eastern equatorial Atlantic (EEA), reveal centennial-
scale variations of riverine freshwater input that are synchronous
with northern high-latitude stadials and interstadials of the
penultimate interglacial and the last deglaciation. EEA Mg/Ca-based
sea surface temperatures (SSTs) were decoupled from northern high-
latitude millennial-scale fluctuation and primarily responded to
changes in atmospheric greenhouse gases and low-latitude solar
insolation. The onset of enhanced monsoon precipitation lags behind
the changes in EEA SSTs by up to 7000 years during glacial-interglacial
transitions. This study demonstrates that the stadial-interstadial
and deglacial climate instability of the northern high latitudes
exerts dominant control on the West African monsoon dynamics through
an atmospheric linkage.

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Link: GET DATA
Description: Access to data and documentation


Link: VIEW RELATED INFORMATION
Description: Access to documentation


Geographic Coverage
 N: 2.5 S: 2.5  E: 9.39  W: 9.39
 Max Depth: 1295 M

Data Set Citation
Dataset Originator/Creator: Weldeab, S., D.W. Lea, R.R. Schneider, and N. Andersen
Dataset Title: Gulf of Guinea MD03-2707 d18O, Ba/Ca, and Mg/Ca Data and SST/West African Monsoon Reconstruction
Dataset Series Name: IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2007-067
Dataset Release Date: August 2007
Dataset Release Place: Boulder, CO
Dataset Publisher: IGBP PAGES/World Data Center for Paleoclimatology
Issue Identification: 2007-067
Other Citation Details: NOAA/NCDC Paleoclimatology Program
Online Resource: http://www.ncdc.noaa.gov/paleo/pubs/weldeab2007/weldeab2007.html


Paleo_Temporal_Coverage
Paleo Start Date: 155 Ka
Paleo Stop Date: 0 Ka
Chrono Unit:


Location Keywords
OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN


Science Keywords
ATMOSPHERE >WEATHER EVENTS >MONSOONS    [Definition]
OCEANS >OCEAN TEMPERATURE >SEA SURFACE TEMPERATURE    [Definition]
OCEANS >SALINITY/DENSITY >SALINITY    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >ISOTOPES    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >MICROFOSSILS    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >OXYGEN ISOTOPES    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >RADIOCARBON    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >SEDIMENTS    [Definition]
PALEOCLIMATE >PALEOCLIMATE RECONSTRUCTIONS >OCEAN SALINITY RECONSTRUCTION    [Definition]
PALEOCLIMATE >PALEOCLIMATE RECONSTRUCTIONS >SEA SURFACE TEMPERATURE RECONSTRUCTION    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION


Project
PAGES >Past Global Changes, IGBP    [Information]


Use Constraints
Institut Francais pour la Recherche et la Technologie Polaires for
Calypso coring through European Union grant HPRI-2001-00120 (R.R.S.).
Deutsche Forschungsgemeinschaft postdoctoral fellowship grant WE 2686/2-1(S.W.).
US National Science Foundation grants OCE0317611 and OCE0502609 (D.W.L.).


Keywords
Gulf of Guinea
West African Monsoon
SST
Mg/Ca
Ba/Ca
d18O
d14C


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: ftp
Distribution_Format: ascii, excel
Fees: none


Personnel
SYEE WELDEAB
Role: INVESTIGATOR
Contact Address:
Department of Earth Science and Marine Science Institute
University of California
City: Santa Barbara
Province or State: CA
Postal Code: 93106-9630
Country: USA


DAVID W. LEA
Role: INVESTIGATOR
Phone: (805) 893-8665
Fax: (805) 893-2314
Email: lea at magic.ucsb.edu
Contact Address:
Department of Geological Sciences and Marine Science Institute
University of California
City: Santa Barbara
Province or State: CA
Postal Code: 93106
Country: USA


RALPH R. SCHNEIDER
Role: INVESTIGATOR
Contact Address:
Institut fur Geowissenschaften
niversitat Kiel
City: Kiel
Country: Germany


NILS ANDERSEN
Role: INVESTIGATOR
Contact Address:
Leibniz-Labor fur Altersbestimmung und Isotopenforschung
Universitat Kiel
City: Kiel
Country: Germany


Publications/References
Weldeab, S., D.W. Lea, R.R. Schneider, and N. Andersen. 2007. 155,000 Years of West African Monsoon and Ocean Thermal Evolution. Science, Vol. 316, pp. 1303-1307, 1 June 2007. doi: 10.1126/science.1140461

Creation and Review Dates
DIF Creation Date: 2007-08-20
Last DIF Revision Date: 2016-01-27



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