Saderne, Vincent; Decarlo, Thomas; Cherviakouski, Klimensi; Jones, Burton: Li/Mg and Sr/Ca ratio in Red Sea Porites Lutea with UMSTEC method seasurface temperature reconstruction [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.966437 (dataset in review)
Abstract:
Cores from Porites lutea were obtained from various locations along the eastern coast of the Red Sea, including the mid-northern, central, and mid-southern regions at depths ranging from 5 to 10 meters. The Northern core (AW1) was specifically collected from the sheltered side of the offshore barrier reef, Al-Jadir reef (25.3935 °N, 36.6861 °E), situated offshore in the Al-Wahj lagoon area. Cores from the central Red Sea were sampled on the sheltered side of the offshore barrier reef, Cement wreck reef (K25; 22.3873 °N, 38.8548 °E), as well as the exposed side of an inshore reef, Abu Shosha (K13; 22.3041 °N, 39.0463 °E). The Southern core was obtained from an offshore reef, Tartaruga reef (F46; 19.1883 °N, 40.2691 °E), part of the larger reef system known as the Farasan Banks in the southwestern Red Sea.
The cores were extracted using a pneumatic drill equipped with a 3-inch concrete core drill bit with a segmented diamond rim (Lackmond SPL Series). Sampling was performed from the tops of massive colonies, and after collection, the cores underwent a series of treatments including soaking in freshwater, ethanol immersion, and air drying. Longitudinal splitting into slabs (>1cm) was done using a core slabbing long bed saw, followed by sonication with deionized water, rinsing with ethanol, and drying at 50 °C. Subsequently, the cores were CT-scanned using a General Electric BrightSpeed machine, and 3D images were generated using the OsiriX DICOM viewer. Density bands identified from the CT-scan were reported to the slab, establishing the chronology.
For the analysis of trace elements, yearly growth bands were uniformly milled from the coral powder samples. The milled powder, obtained after pre-milling and cleaning, was dissolved in 2 ml of 4% HNO3 and diluted to a final concentration of 3±0.3 ppm Ca in a 1% HNO3 solution. Triple quadrupole ICP-MS (Agilent 8800) was employed for trace element measurements. A calibration curve was created using standards with 3 ppm Ca and varying amounts of Li, Mg, and Sr in 1% HNO3. Isotope counts were background-corrected, and instrument drift was monitored using standards JCp-1 and NEP-3b. Isotopic ratio results were compared to the international standard JCp-1.
Sea surface temperature (SST) reconstructions were performed using the universal multi-trace elements calibration scheme (UMTECS) for the genus Porites by D'Olivo et al. (2018, doi:10.1016/j.gca.2018.07.035). The SST determination involved averaging results from six analog derivation equations, solving SST from the linear relationship between Sr/Ca and Li/Mg in the Porites colony. The calculations considered the slope and intercept of this relationship, and the uncertainty in the results was addressed through Monte Carlo simulations. The final SST calculations were based solely on Sr/Ca-Li/Mg slopes, with the mean and variance of 20,000 simulated SST values providing a single SST±SD per year.
Funding:
Coverage:
Median Latitude: 24.621150 * Median Longitude: 37.276150 * South-bound Latitude: 22.304100 * West-bound Longitude: 36.686100 * North-bound Latitude: 25.393500 * East-bound Longitude: 39.046300
Date/Time Start: 2020-02-01T00:00:00 * Date/Time End: 2020-10-01T00:00:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
4 datasets
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Datasets listed in this bundled publication
- Saderne, V; Decarlo, T; Cherviakouski, K et al. (in review): Li/Mg and Sr/Ca ratio and sea surface temperature reconstruction of core Abu Shosha (K13) from the Porites lutea (Red Sea). https://doi.pangaea.de/10.1594/PANGAEA.966433
- Saderne, V; Decarlo, T; Cherviakouski, K et al. (in review): Li/Mg and Sr/Ca ratio and sea surface temperature reconstruction of core Al-Jadir reef (AW1) from the Porites lutea (Red Sea). https://doi.pangaea.de/10.1594/PANGAEA.966434
- Saderne, V; Decarlo, T; Cherviakouski, K et al. (in review): Li/Mg and Sr/Ca ratio and sea surface temperature reconstruction of core Cement wreck reef (K25) from the Porites lutea (Red Sea). https://doi.pangaea.de/10.1594/PANGAEA.966435
- Saderne, V; Decarlo, T; Cherviakouski, K et al. (in review): Li/Mg and Sr/Ca ratio and sea surface temperature reconstruction of core Tartaruga reef (F46) from the Porites lutea (Red Sea). https://doi.pangaea.de/10.1594/PANGAEA.966436