NOAA/WDS Paleoclimatology - Tropical Ocean Sr/Ca and U/Ca Data for the Twentieth Century
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 Coral. The data include parameters of corals and sclerosponges with a geographic location of Central Pacific Ocean. The time period coverage is from 50 to -65 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: Alpert, A.E.; Cohen, A.L.; Oppo, D.W.; DeCarlo, T.M.; Gaetani, G.A.; Hernandez-Delgado, E.; Winter, A.; Gonneea, M. (2017-05-01): NOAA/WDS Paleoclimatology - Tropical Ocean Sr/Ca and U/Ca Data for the Twentieth Century. [indicate subset used]. NOAA National Centers for Environmental Information. https://doi.org/10.25921/3zm3-g168. Accessed [date].
- Please refer to Credit tab for full citation information.
Dataset Identifiers
- doi:10.25921/3zm3-g168
- noaa-coral-22056
- NCEI DSI 1200_02
- NCEI DSI 1200_01
ISO 19115-2 Metadata
noaa-coral-22056
Coverage Description | Date Range: 1900 CE to 2015 CE; Date Range: 50 cal yr BP to -65 cal yr BP; |
Time Period | 1900 to 2015 |
Spatial Bounding Box Coordinates |
West: -162.12
East: 134.5602
South: -.37167
North: 32.316667
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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: Chronology based on band counting of CT scan. Provided Keywords: biomineralization, SST ABSTRACT SUPPLIED BY ORIGINATOR: Coral skeletons are valuable archives of past ocean conditions. However, interpretation of coral paleotemperature records is confounded by uncertainties associated with single-element ratio thermometers, including Sr/Ca. A new approach, Sr-U, uses U/Ca to constrain the influence of Rayleigh fractionation on Sr/Ca. Here we build on the initial Pacific Porites Sr-U calibration to include multiple Atlantic and Pacific coral genera from multiple coral reef locations spanning a temperature range of 23.15–30.12°C. Accounting for the wintertime growth cessation of one Bermuda coral, we show that Sr-U is strongly correlated with the average water temperature at each location (r2 = 0.91, P < 0.001, n = 19). We applied the multispecies spatial calibration between Sr-U and temperature to reconstruct a 96 year long temperature record at Mona Island, Puerto Rico, using a coral not included in the calibration. Average Sr-U derived temperature for the period 1900–1996 is within 0.12°C of the average instrumental temperature at this site and captures the twentieth century warming trend of 0.06°C per decade. Sr-U also captures the timing of multiyear variability but with higher amplitude than implied by the instrumental data. Mean Sr-U temperatures and patterns of multiyear variability were replicated in a second coral in the same grid box. Conversely, Sr/Ca records from the same two corals were inconsistent with each other and failed to capture absolute sea temperatures, timing of multiyear variability, or the twentieth century warming trend. Our results suggest that coral Sr-U paleothermometry is a promising new tool for reconstruction of past ocean temperatures. |
Purpose | Records of past climate and ocean environment derived from stable isotope, trace metal, and other measurements made on corals and sclerosponges. 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: 2022-03-22
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