NOAA/WDS Paleoclimatology - Eastern Equatorial Atlantic Primary Productivity, Sea Surface Temperature and Salinity Reconstructions over the last 44 kyr
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 Climate Reconstruction. The data include parameters of climate reconstructions|paleoceanography with a geographic location of South Atlantic Ocean. The time period coverage is from 43422 to 1540 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: Hardy, W.; Marret, F.; Penaud, A.; le Mézo, P.; Droz, L.; Marsset, T.; Kageyama, M. (2020-04-15): NOAA/WDS Paleoclimatology - Eastern Equatorial Atlantic Primary Productivity, Sea Surface Temperature and Salinity Reconstructions over the last 44 kyr. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/bwze-0521. Accessed [date].
- Please refer to Credit tab for full citation information.
- doi:10.25921/bwze-0521
- noaa-recon-30072
- NCEI DSI 1200_02
- NCEI DSI 1200_01
noaa-recon-30072
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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: 43422 cal yr BP to 1540 cal yr BP; |
Time Period | -41472 to 410 |
Spatial Bounding Box Coordinates |
N: -5.7
S: -5.7
E: 11.23
W: 11.23
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Data Presentation Form | Digital table - digital representation of facts or figures systematically displayed, especially in columns
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Dataset Progress Status | Complete - production of the data has been completed |
Data Update Frequency | Data update frequency not available |
Supplemental Information |
STUDY NOTES: Metadata are from the Temperature-12k project (https://doi.org/10.25921/4RY2-G808). Data are from the supplemental material of Hardy et al. 2018 (https://doi.org/10.1016/j.palaeo.2018.06.025).
ABSTRACT SUPPLIED BY ORIGINATOR: In order to better explore quantitative reconstructions of net primary productivity (NPP) conditions using a dinoflagellate cyst (dinocyst)-based transfer function method, we revised the tropical Atlantic modern dinocyst database n=208 (Marret et al., 2008). Modern assemblages from the worldwide dinocyst atlas (Zonneveld et al., 2013) were added to provide a better geographical coverage of the South Atlantic Ocean. The environmental dataset was updated using the World Ocean Atlas 2013 for sea-surface temperature (SST) and sea-surface salinity (SSS) data, as well as for 1997–2017 mean NPP values recorded during SeaWifs and MODIS spatial programs. New environmental datasets were tested using anomalies regarding mean latitudinal SST as a potential index to track past upwelling activity. Finally, preindustrial NPP values, simulated with the IPSL-CM5ALR model developed at the Institut Pierre Simon Laplace (IPSL) have been added to the dinocyst environmental database to provide NPP values consistent with the mean age of “modern” dinocyst assemblages. The transfer function method using the updated modern database was then applied to fossil dinocyst assemblages of core KZAI-01, retrieved off the Congo River mouth and covering the last 43.2kyr. Our results indicate a dominant orbital forcing, with higher primary productivity values reconstructed during precession minima (MIS 3 and the last deglaciation) and enhanced by a maximum of obliquity during the last deglaciation and the Holocene. The synchronicity between high upwelling intensity and high terrigenous inputs during high NPP period (e.g. during the last Deglaciation) highlighted the prevalent role of river-induced upwelling activity, which is specific to the Congo River. These results have improved our understanding of the environmental forcing leading to major trophic changes in the intertropical area. |
Purpose | Records of past temperature, precipitation, and other climate variables derived from paleoclimate proxies. Parameter keywords describe what was measured in this data set. Additional summary information can be found in the abstracts of papers listed in the data set citations. |
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Theme keywords | Global Change Master Directory (GCMD) Science Keywords
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Data Center keywords | Global Change Master Directory (GCMD) Data Center Keywords
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Last Modified: 2023-09-01
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