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Dataset Overview | National Centers for Environmental Information (NCEI)

NOAA/WDS Paleoclimatology - Indian Ocean Pliocene Paired Foraminiferal d18O and Mg/Ca Data

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 Indian Ocean. The time period coverage is from 5994000 to 2004000 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: Karas, C.; Nürnberg, D.; Tiedemann, R.; Garbe-Schönberg, D. (2011-05-18): NOAA/WDS Paleoclimatology - Indian Ocean Pliocene Paired Foraminiferal d18O and Mg/Ca Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/yrx6-sm17. Accessed [date].
  • Please refer to Credit tab for full citation information.
noaa-ocean-11195
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Distributor NOAA 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 Description Date Range: 5994000 cal yr BP to 2004000 cal yr BP;
Time Period -5992050 to -2002050
Spatial Bounding Box Coordinates
West: 60.5517
East: 112.2083
South: -20.5867
North: -3.915
Spatial Coverage Map
General Documentation
Associated Resources
  • Pliocene Indonesian Throughflow and Leeuwin Current dynamics: Implications for Indian Ocean polar heat flux
    • Associated Reference published 2011
      Cyrus Karas, Dirk Nürnberg, Ralf Tiedemann, Dieter Garbe-Schönberg, 2011: Pliocene Indonesian Throughflow and Leeuwin Current dynamics: Implications for Indian Ocean polar heat flux. Paleoceanography, 26, , 10.1029/2010PA001949
Publication Dates
  • publication: 2011-05-18
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Complete - production of the data has been completed
Data Update Frequency Data update frequency not available
Supplemental Information
STUDY NOTES: Combined planktonic foraminiferal Mg/Ca and d18O data spanning the time period from 6-2 Ma, from 2 Indian Ocean ODP sites. Core ODP 763A is located in the subtropical eastern Indian Ocean within the present influence of the Leeuwin Current, and Core ODP 709C is located in the tropical western Indian Ocean. The ODP 709C isotope data are from Shackleton and Hall, 1990.
ABSTRACT SUPPLIED BY ORIGINATOR: To understand the gradual global cooling during the mid‐Pliocene (3.5-2.5 Myr ago) one needs to consider the tectonical constriction of tropical seaways, which affected ocean circulation and the evolution of climate. Here we use paired measurements of d18O and Mg/Ca ratios of planktonic foraminifera to reconstruct the Pliocene hydrography of the western tropical Indian Ocean (Site 709C) and changes in the Leeuwin Current in the eastern subtropical Indian Ocean (Site 763A) in response to Indonesian Gateway dynamics. Today, the Indonesian Throughflow (ITF) and, subsequently, the warm southward flowing Leeuwin Current off Western Australia are essential for the polar heat transport in the Indian Ocean. During 3.5-3 Ma, sea surface temperatures significantly dropped in the Leeuwin Current area, becoming since -3.3 Ma 2C-3C cooler than the rather unchanged sea surface temperatures from the eastern and western tropical Indian Ocean. We refer this drop in sea surface temperatures to a weakened Leeuwin Current with severe climatic effects on Western Australia induced by a tectonically reduced surface ITF. We suggest that this reduced surface ITF led to a diminished poleward heat transport in the Indian Ocean resulting in a weakened Leeuwin Current and possibly to cooling of the Benguela upwelling system.
Purpose Records 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: Karas, C.; Nürnberg, D.; Tiedemann, R.; Garbe-Schönberg, D. (2011-05-18): NOAA/WDS Paleoclimatology - Indian Ocean Pliocene Paired Foraminiferal d18O and Mg/Ca Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/yrx6-sm17. 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
  • Karas, C.
  • Nürnberg, D.
  • Tiedemann, R.
  • Garbe-Schönberg, D.
Originators
  • Karas, C.
  • Nürnberg, D.
  • Tiedemann, R.
  • Garbe-Schönberg, D.
Publishers
  • NOAA National Centers for Environmental Information
Theme keywords Global 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 > oxygen isotopes
  • earth science > paleoclimate > paleocean > geochemistry
Paleoenvironmental Standard Terms (PaST) Thesaurus
  • What: depth; Material: null
  • What: magnesium/calcium; Material: Trilobatus sacculifer
  • What: age; Material: null
  • What: delta 18O; Material: Cibicidoides wuellerstorfi
  • What: delta 18O; Material: Trilobatus sacculifer
Data Center keywords Global 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 > Indian Ocean > ODP 763A > LATITUDE -20.5867 > LONGITUDE 112.2083
  • Ocean > Indian Ocean > ODP 709C > LATITUDE -3.915 > LONGITUDE 60.5517
Use Constraints
  • Cite as: Karas, C.; Nürnberg, D.; Tiedemann, R.; Garbe-Schönberg, D. (2011-05-18): NOAA/WDS Paleoclimatology - Indian Ocean Pliocene Paired Foraminiferal d18O and Mg/Ca Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/yrx6-sm17. 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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