Saenger, Casey; Cohen, Anne L; Oppo, Delia W; Hubbard, Dennis (2008): (Table 1) Summary of coral geochemical data and reconstructed SST [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.832185, Supplement to: Saenger, C et al. (2008): Interpreting sea surface temperature from strontium/calcium ratios in Montastrea corals: Link with growth rate and implications for proxy reconstructions|. Paleoceanography, 23(3), PA3102, https://doi.org/10.1029/2007PA001572
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Abstract:
We analyzed strontium/calcium ratios (Sr/Ca) in four colonies of the Atlantic coral genus Montastrea with growth rates ranging from 2.3 to 12.6 mm/a. Derived Sr/Ca-sea surface temperature (SST) calibrations exhibit significant differences among the four colonies that cannot be explained by variations in SST or seawater Sr/Ca. For a single coral Sr/Ca ratio of 8.8 mmol/mol, the four calibrations predict SSTs ranging from 24.0° to 30.9°C. We find that differences in the Sr/Ca-SST relationships are correlated systematically with the average annual extension rate (ext) of each colony such that Sr/Ca (mmol/mol) = 11.82 (±0.13) - 0.058 (±0.004) * ext (mm/a) - 0.092 (±0.005) * SST (°C). This observation is consistent with previous reports of a link between coral Sr/Ca and growth rate. Verification of our growth-dependent Sr/Ca-SST calibration using a coral excluded from the calibration reconstructs the mean and seasonal amplitude of the actual recorded SST to within 0.3°C. Applying a traditional, nongrowth-dependent Sr/Ca-SST calibration derived from a modern Montastrea to the Sr/Ca ratios of a conspecific coral that grew during the early Little Ice Age (LIA) (400 years B.P.) suggests that Caribbean SSTs were >5°C cooler than today. Conversely, application of our growth-dependent Sr/Ca-SST calibration to Sr/Ca ratios derived from the LIA coral indicates that SSTs during the 5-year period analyzed were within error (±1.4°C) of modern values.
Coverage:
Latitude: 17.750000 * Longitude: -64.750000
Event(s):
Comment:
Differenbce IGOSS is IGOSS SST subtracted from coral-based SST reconstructions
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Saenger, Casey | |||
| 2 | AGE | Age | ka BP | Geocode | ||
| 3 | Age, error | Age e | ± | Saenger, Casey | ||
| 4 | Age | Age | a AD/CE | Saenger, Casey | Minimum | |
| 5 | Age | Age | a AD/CE | Saenger, Casey | Maximum | |
| 6 | Growth rate | µ | mm/a | Saenger, Casey | ||
| 7 | Strontium/Calcium ratio | Sr/Ca | mmol/mol | Saenger, Casey | ||
| 8 | Amplitude | Amplitude | Saenger, Casey | Sr/Ca coral | ||
| 9 | δ18O, skeletal carbonate | δ18O skel carb | ‰ PDB | Saenger, Casey | ||
| 10 | Amplitude | Amplitude | Saenger, Casey | d18O coral | ||
| 11 | Strontium/Calcium ratio | Sr/Ca | mmol/mol | Saenger, Casey | ||
| 12 | Amplitude | Amplitude | Saenger, Casey | Sr/Ca se water | ||
| 13 | Sea surface temperature, annual mean | SST (1-12) | °C | Saenger, Casey | Growth-dependent | |
| 14 | Amplitude | Amplitude | Saenger, Casey | Growth-dependent SST | ||
| 15 | Difference | Diff | Saenger, Casey | Integrated Global Ocean Services System (IGOSS), growth-dependent SST | ||
| 16 | Amplitude | Amplitude | Saenger, Casey | Difference Integrated Global Ocean Services System (IGOSS), growth-dependent SST | ||
| 17 | Sea surface temperature, annual mean | SST (1-12) | °C | Saenger, Casey | Nongrowth-dependent | |
| 18 | Amplitude | Amplitude | Saenger, Casey | Nongrowth-dependent SST | ||
| 19 | Difference | Diff | Saenger, Casey | Integrated Global Ocean Services System (IGOSS), nongrowth-dependent SST | ||
| 20 | Amplitude | Amplitude | Saenger, Casey | Difference Integrated Global Ocean Services System (IGOSS), nongrowth-dependent SST |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
79 data points