NOAA/WDS Paleoclimatology - Indian Ocean Pliocene Paired Foraminiferal d18O and Mg/Ca Data
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organisationName: NOAA World Data Service for Paleoclimatology
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title: NOAA/WDS Paleoclimatology - Indian Ocean Pliocene Paired Foraminiferal d18O and Mg/Ca Data
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date: 2011-05-18
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Anchor: DOI doi:10.25921/yrx6-sm17
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code: noaa-ocean-11195
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code: NCEI DSI 1200_02
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individualName: Karas, C.
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individualName: Nürnberg, D.
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individualName: Tiedemann, R.
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individualName: Garbe-Schönberg, D.
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abstract: 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.
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.
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electronicMailAddress: paleo@noaa.gov
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fileDescription: Paleoclimatology - Paleoceanography
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descriptiveKeywords: (MD_Keywords)
keyword: Earth Science > Paleoclimate > Ocean/Lake Records
keyword: Earth Science > Climate Indicators > Paleoclimate Indicators > Ocean/Lake Records
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date: 2020-01-09
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keyword: earth science > paleoclimate > paleoceanography
keyword: earth science > paleoclimate > paleoceanography
keyword: earth science > paleoclimate > paleoceanography
keyword: earth science > paleoclimate > paleoceanography
keyword: earth science > paleoclimate > paleoceanography
keyword: earth science > paleoclimate > paleocean > oxygen isotopes
keyword: earth science > paleoclimate > paleocean > geochemistry
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keyword: What: depth; Material: null
keyword: What: magnesium/calcium; Material: Trilobatus sacculifer
keyword: What: age; Material: null
keyword: What: delta 18O; Material: Cibicidoides wuellerstorfi
keyword: What: delta 18O; Material: Trilobatus sacculifer
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keyword: Ocean > Indian Ocean > ODP 763A > LATITUDE -20.5867 > LONGITUDE 112.2083
keyword: Ocean > Indian Ocean > ODP 709C > LATITUDE -3.915 > LONGITUDE 60.5517
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keyword: DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
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otherConstraints: 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].
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otherConstraints: 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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otherConstraints: 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.
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otherConstraints: 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.
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title: Pliocene Indonesian Throughflow and Leeuwin Current dynamics: Implications for Indian Ocean polar heat flux
date: (CI_Date)
date: 2011
dateType: (CI_DateTypeCode) publication
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individualName: Cyrus Karas, Dirk Nürnberg, Ralf Tiedemann, Dieter Garbe-Schönberg
role: (CI_RoleCode) author
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organisationName: Paleoceanography
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linkage: https://doi.org/10.1029/2010PA001949
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description: 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
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description: Date Range: 5994000 cal yr BP to 2004000 cal yr BP;
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westBoundLongitude: 60.5517
eastBoundLongitude: 112.2083
southBoundLatitude: -20.5867
northBoundLatitude: -3.915
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TimePeriod:
beginPosition: -5992050
endPosition: -2002050
supplementalInformation: 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.
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orderingInstructions: Contact NCEI for other distribution options and instructions.
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maintenanceNote: This ISO metadata record was translated from DIF metadata using dif-9x-to-iso-19115-2.xsl Version: 2022-06-21
