Skip to main content
Dataset Overview | National Centers for Environmental Information (NCEI)

NOAA/WDS Paleoclimatology - Atlantic Coretop Foraminiferal Mg/Ca and d18O Calibration 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 North Atlantic Ocean. The time period coverage is from 10 to -10 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: Arbuszewski, J.A.; deMenocal, P.B.; Kaplan, A.; Farmer, E.C. (2011-01-26): NOAA/WDS Paleoclimatology - Atlantic Coretop Foraminiferal Mg/Ca and d18O Calibration Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/ay6c-cv63. Accessed [date].
  • Please refer to Credit tab for full citation information.
noaa-ocean-10513
Search Data
Download Data
Distribution Formats
  • Native Format(s)
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: 10 cal yr BP to -10 cal yr BP;
Time Period 1940 to 1960
Spatial Bounding Box Coordinates
West: -25.15
East: -25.15
South: 42.85
North: 42.85
Spatial Coverage Map
General Documentation
Associated Resources
  • On the fidelity of shell-derived d18Oseawater estimates
    • Associated Reference published 2010
      Arbuszewski, J., P. deMenocal, A. Kaplan, and E.C. Farmer, 2010: On the fidelity of shell-derived d18Oseawater estimates. Earth and Planetary Science Letters, 300, 185-196, 10.1016/j.epsl.2010.10.035
Publication Dates
  • publication: 2011-01-26
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: Coretop foraminiferal magnesium/calcium ratio and oxygen isotope data from a meridional transect of 64 Atlantic samples. Mg/Ca ratio and d18O measured on Globigerinoides ruber (white) are used to evaluate shell-derived d18Oseawater estimates across different salinity regimes in the Atlantic Ocean.
ABSTRACT SUPPLIED BY ORIGINATOR: Paired foraminiferal Magnesium/Calcium ratio and oxygen isotope analyses are widely used to estimate surface ocean δ18Oseawater, a robust proxy for surface salinity. We assess the fidelity of shell-derived δ18Oseawater estimates for the surface-dwelling foraminifer Globigerinoides ruber (white) using an Atlantic meridional coretop transect spanning basin-scale temperature and salinity gradients. Shell-derived and observed δ18Oseawater values are well correlated (r2 = 0.77), but a large systematic bias is observed. Shell Mg/Ca ratios are significantly elevated above values expected from observed and isotopic calcification temperatures in the saline subtropical gyres of both hemispheres. This temperature-independent shell Mg/Ca ratio variability, termed “excess Mg/Ca”, is highly correlated with surface salinity (r2 = 0.77), and the observed salinity dependence (27 ± 4%) is much higher than indicated by culture studies (6 ± 2%). Our coretop data are used to develop new Atlantic Basin temperature and salinity calibration equations that are accurate (± 1.1 °C and ± 0.20, respectively), precise (r2 = 0.82 and 0.81, respectively), and verifiable using previously published data. These results are valid for the relatively high salinities of the subtropical Atlantic (35.5–37.3). We discover that inclusion of other published data from lower salinity regions (< 35) indicates little or no excess Mg/Ca. Taken together, these results point to a strongly non-linear, positive salinity effect on shell Mg/Ca ratios that significantly affects the accuracy of SST and δ18Oseawater estimates in high salinity settings (> 35).
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: Arbuszewski, J.A.; deMenocal, P.B.; Kaplan, A.; Farmer, E.C. (2011-01-26): NOAA/WDS Paleoclimatology - Atlantic Coretop Foraminiferal Mg/Ca and d18O Calibration Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/ay6c-cv63. 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
  • Arbuszewski, J.A.
  • deMenocal, P.B.
  • Kaplan, A.
  • Farmer, E.C.
Originators
  • Arbuszewski, J.A.
  • deMenocal, P.B.
  • Kaplan, A.
  • Farmer, E.C.
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 > climate reconstructions|paleoceanography
  • earth science > paleoclimate > climate reconstructions|paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > instrumental
  • earth science > paleoclimate > climate reconstructions|paleoceanography
  • earth science > paleoclimate > climate reconstructions|paleoceanography
  • earth science > paleoclimate > climate reconstructions|paleoceanography
  • earth science > paleoclimate > instrumental
  • earth science > paleoclimate > instrumental
  • earth science > paleoclimate > climate reconstructions|paleoceanography
  • earth science > paleoclimate > climate reconstructions|paleoceanography
  • earth science > paleoclimate > instrumental
  • earth science > paleoclimate > climate reconstructions|paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > paleoceanography
  • earth science > paleoclimate > instrumental
  • earth science > paleoclimate > paleocean > oxygen isotopes
  • earth science > paleoclimate > paleocean > geochemistry
Paleoenvironmental Standard Terms (PaST) Thesaurus
  • What: delta 18O; Material: Globigerinoides ruber white
  • What: notes; Material: null
  • What: longitude; Material: null
  • What: magnesium/calcium; Material: Globigerinoides ruber white
  • What: carbonate ion; Material: sea water
  • What: sample identification; Material: null
  • What: latitude; Material: null
  • What: delta 18O; Material: sea water
  • What: delta 18O; Material: sea water
  • What: carbonate ion; Material: sea water
  • What: collection water depth; Material: null
  • What: depth; Material: null
  • What: salinity; Material: sea water
  • What: notes; Material: null
  • What: magnesium/calcium; Material: Globigerinoides ruber white
  • What: mass; Material: Globigerinoides ruber white
  • What: sea surface temperature; Material: null
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 > Atlantic Ocean > North Atlantic Ocean > VM29-178 > LATITUDE 42.85 > LONGITUDE -25.15
Use Constraints
  • Cite as: Arbuszewski, J.A.; deMenocal, P.B.; Kaplan, A.; Farmer, E.C. (2011-01-26): NOAA/WDS Paleoclimatology - Atlantic Coretop Foraminiferal Mg/Ca and d18O Calibration Data. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/ay6c-cv63. 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.
  • None
Fees
  • In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.
Last Modified: 2024-01-25
For questions about the information on this page, please email: ncei.info@noaa.gov