NOAA/WDS Paleoclimatology - Kerguelen Plateau ODP748 Eocene-Oligocene Nannofossil Isotope Data
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 Southern Ocean. The time period coverage is from 42520000 to 23151000 in calendar years before present (BP). See metadata information for parameter and study location details. Please cite this study when using the data.
Dataset Citation
- Cite as: Villa, G.; Fioroni, C.; Pea, L.; Bohaty, S.M.; Persico, D. (2011-08-19): NOAA/WDS Paleoclimatology - Kerguelen Plateau ODP748 Eocene-Oligocene Nannofossil Isotope Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/ygbf-we80. Accessed [date].
- Please refer to Credit tab for full citation information.
Dataset Identifiers
- doi:10.25921/ygbf-we80
- noaa-ocean-11923
- NCEI DSI 1200_02
- NCEI DSI 1200_01
ISO 19115-2 Metadata
noaa-ocean-11923
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Ordering Instructions | Contact NCEI for other distribution options and instructions. |
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: 42520000 cal yr BP to 23151000 cal yr BP; |
Time Period | -42518050 to -23149050 |
Spatial Bounding Box Coordinates |
West: 78.9981
East: 78.9981
South: -58.441
North: -58.441
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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: Stable isotope data on calcareous nannofossils from marine sediments sampled in Kerguelen Plateau ODP Core 748, for the Eocene and Oligocene (~42 - ~23 MYrBP). ABSTRACT SUPPLIED BY ORIGINATOR: A major deterioration in global climate occurred through the Eocene-Oligocene time interval, characterized by long-term cooling in both terrestrial and marine environments. During this long-term cooling trend, however, recent studies have documented several short-lived warming and cooling phases. In order to further investigate high-latitude climate during these events, we developed a high-resolution calcareous nannofossil record from ODP Site 748 Hole B for the interval spanning the late middle Eocene to the late Oligocene (~42 to 26 Ma). The primary goals of this study were to construct a detailed biostratigraphic record and to use nannofossil assemblage variations to interpret short-term changes in surface-water temperature and nutrient conditions. The principal nannofossil assemblage variations are identified using a temperate-warm-water taxa index (Twwt), from which three warming and five cooling events are identified within the middle Eocene to the earliest Oligocene interval. Among these climatic trends, the cooling event at ~39 Ma (Cooling Event B) is recorded here for the first time. Variations in fine-fraction d18O values at Site 748 are associated with changes in the Twwt index, supporting the idea that significant short-term variability in surface-water conditions occurred in the Kerguelen Plateau area during the middle and late Eocene. Furthermore, ODP Site 748 calcareous nannofossil paleoecology confirms the utility of these microfossils for biostratigraphic, paleoclimatic, and paleoceanographic reconstructions at Southern Ocean sites during the Paleogene. |
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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Last Modified: 2024-04-03
For questions about the information on this page, please email: ncei.info@noaa.gov
For questions about the information on this page, please email: ncei.info@noaa.gov