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NOAA/WDS Paleoclimatology - Niger Delta Mg/Ca Data over the Last 21 Kyr

browse graphicPaleoclimatology - Paleoceanography
This archived Paleoclimatology Study is available from the NOAA National Centers for Environmental Information (NCEI), under the World Data Service (WDS) for Paleoclimatology. The associated NCEI study type is Paleoceanography. The data include parameters of paleoceanography with a geographic location of North Atlantic Ocean. The time period coverage is from 20910 to 550 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.
  • Cite as: Schmidt, M.W.; Chang, P.; Parker, A.O.; Ji, L.; He, F. (2017-11-21): NOAA/WDS Paleoclimatology - Niger Delta Mg/Ca Data over the Last 21 Kyr. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/dcgb-av38. Accessed [date].
  • Please refer to Credit tab for full citation information.
noaa-ocean-23112
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DistributorNOAA National Centers for Environmental Information
ncei.info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Dataset Point of Contact Data Center Contact
NOAA World Data Service for Paleoclimatology
828-271-4800
paleo@noaa.gov
Coverage DescriptionDate Range: 20910 cal yr BP to 550 cal yr BP;
Time Period-18960 to 1400
Spatial Bounding Box Coordinates
N: 4.81
S: 4.81
E: 4.45
W: 4.45
Spatial Coverage Map
General Documentation
Associated Resources
  • Deglacial Tropical Atlantic subsurface warming links ocean circulation variability to the West African Monsoon
    • Associated Reference published 2017
      Schmidt, Matthew W., Ping Chang, Andrew O. Parker, Link Ji and Feng He, 2017: Deglacial Tropical Atlantic subsurface warming links ocean circulation variability to the West African Monsoon. Scientific Reports, 7, 1-11, 10.1038/s41598-017-15637-6
Publication Dates
  • publication: 2017-11-21
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress StatusComplete - production of the data has been completed
Data Update Frequency Data update frequency not available
Supplemental Information
STUDY NOTES: Provided Keywords: Deglaciation, abrupt climate change, West African Monsoon, Mg/Ca temperature, subsurface temperature, Niger delta, Younger Dryas, Heinrich Event 1, LGM, GCM modelling, Globorotalia crassaformis
ABSTRACT SUPPLIED BY ORIGINATOR: Multiple lines of evidence show that cold stadials in the North Atlantic were accompanied by both reductions in Atlantic Meridional Overturning Circulation (AMOC) and collapses of the West African Monsoon (WAM). Although records of terrestrial change identify abrupt WAM variability across the deglaciation, few studies show how ocean temperatures evolved across the deglaciation. To identify the mechanism linking AMOC to the WAM, we generated a new record of subsurface temperature variability over the last 21 kyr based on Mg/Ca ratios in a sub-thermocline dwelling planktonic foraminifera in an Eastern Equatorial Atlantic (EEA) sediment core from the Niger Delta. Our subsurface temperature record shows abrupt subsurface warming during both the Younger Dryas (YD) and Heinrich Event 1. We also conducted a new transient coupled ocean-atmosphere model simulation across the YD that better resolves the western boundary current dynamics and find a strong negative correlation between AMOC strength and EEA subsurface temperatures caused by changes in ocean circulation and rainfall responses that are consistent with the observed WAM change. Our combined proxy and modeling results provide the first evidence that an oceanic teleconnection between AMOC strength and subsurface temperature in the EEA impacted the intensity of the WAM on millennial time scales.
PurposeRecords of past climate and ocean circulation derived from marine sediments. Parameter keywords describe what was measured in this dataset. Additional summary information can be found in the abstracts of papers listed in the dataset citations.
Dataset Citation
  • Cite as: Schmidt, M.W.; Chang, P.; Parker, A.O.; Ji, L.; He, F. (2017-11-21): NOAA/WDS Paleoclimatology - Niger Delta Mg/Ca Data over the Last 21 Kyr. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/dcgb-av38. Accessed [date].
  • Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.
Cited Authors
  • Schmidt, M.W.
  • Chang, P.
  • Parker, A.O.
  • Ji, L.
  • He, F.
Originators
  • Schmidt, M.W.
  • Chang, P.
  • Parker, A.O.
  • Ji, L.
  • He, F.
Publishers
  • NOAA National Centers for Environmental Information
Theme keywordsGlobal Change Master Directory (GCMD) Science Keywords
  • Earth Science > Paleoclimate > Ocean/Lake Records
  • Earth Science > Climate Indicators > Paleoclimate Indicators > Ocean/Lake Records
Global Change Master Directory (GCMD) Science Keywords
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleocean > geochemistry
  • earth science > paleoclimate > paleocean > trace metals in carbonates
Paleoenvironmental Standard Terms (PaST) Thesaurus
  • What: magnesium/calcium; Material: Globorotalia crassaformis
  • What: number of samples; Material: null
  • What: age; Material: null
  • What: depth; Material: null
  • What: magnesium/calcium; Material: Globorotalia crassaformis
Data Center keywordsGlobal Change Master Directory (GCMD) Data Center Keywords
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Place keywords
  • Ocean > Atlantic Ocean > North Atlantic Ocean > Fan 17, Niger Delta > LATITUDE 4.81 > LONGITUDE 4.45
Use Constraints
  • Cite as: Schmidt, M.W.; Chang, P.; Parker, A.O.; Ji, L.; He, F. (2017-11-21): NOAA/WDS Paleoclimatology - Niger Delta Mg/Ca Data over the Last 21 Kyr. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/dcgb-av38. Accessed [date].
  • Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
  • Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.
Access Constraints
  • Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
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Last Modified: 2023-09-01
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