Mohtadi, Mahyar; Prange, Matthias; Oppo, Delia W; De Pol-Holz, Ricardo; Merkel, Ute; Zhang, Xiao; Steinke, Stephan; Lückge, Andreas (2024): Hydroclimate records from the eastern tropical Indian Ocean of sediment core SO189-39KL [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.971792, In supplement to: Mohtadi, M et al. (2014): North Atlantic forcing of tropical Indian Ocean climate. Nature, 509(7498), 76-80, https://doi.org/10.1038/nature13196
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Published: 2024-10-07 • DOI registered: 2024-11-05
Abstract:
Planktic foraminiferal oxygen isotopes, Mg/Ca and Mg/Ca-derived SST estimates of sediment core SO189/2_039KL. The isotopic composition of the samples was measured using a Finnigan MAT 251 mass spectrometer, which is connected with automatic lines for carbonate preparation. For all stable isotope measurements, a working standard was used, which has been calibrated against VPDB (Vienna Pee Dee Belemnite) by using the NBS 19 standard. The long‐term analytical standard deviation is about ±0.07‰ (Isotope Laboratory at Faculty of Geosciences, University of Bremen). For Mg/Ca analysis, samples were cleaned by applying a slight modification of the method originally proposed by Barker et al. (2003). Mg/Ca measurements were performed at MARUM, University of Bremen, using a Perkin ElmerOptima 3300 R inductively coupled plasma optical emission spectrophotometer (ICP-OES) equipped with an autosampler and a U-5000 AT ultrasonic nebulizer (Cetac Technologies). Mg/Ca ratios were converted to temperature following the multispecies Mg/Ca-temperature calibration of Anand et al. (2003; doi:10.1029/2002PA000846). To calculate the δ18O of seawater, the δ18O:temperature equation of Bemis et al. (1998; doi:10.1029/98PA00070) was used. The values were then converted to standard mean ocean water (SMOW) by adding 0.27% and corrected for sea-level changes following Waelbroeck et al. (2002; doi:10.1016/S0277-3791(01)00101-9).
Project(s):
Coverage:
Latitude: -0.790000 * Longitude: 99.908500
Date/Time Start: 2006-09-14T06:40:00 * Date/Time End: 2006-09-14T06:40:00
Minimum DEPTH, sediment/rock: 0.02 m * Maximum DEPTH, sediment/rock: 13.48 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Mohtadi, Mahyar | Geocode – merged | |
| 2 | AGE | Age | ka BP | Mohtadi, Mahyar | Geocode | |
| 3 | Globigerinoides ruber sensu stricto, Magnesium/Calcium ratio | G. ruber ss Mg/Ca | mmol/mol | Mohtadi, Mahyar | ICP-OES, Perkin-Elmer, Optima 3300R | G. ruber white s.s. |
| 4 | Sea surface temperature, annual mean | SST (1-12) | °C | Mohtadi, Mahyar | Calculated, according to Anand et al. (2003) | G. ruber white s.s., Mg/Ca = 0.38 exp (0.09*T) |
| 5 | Globigerinoides ruber sensu stricto, δ18O | G. ruber ss δ18O | ‰ PDB | Mohtadi, Mahyar | Mass spectrometer Finnigan MAT 251 | vs. VPDB, G. ruber white s.s. |
| 6 | δ18O, water | δ18O H2O | ‰ SMOW | Mohtadi, Mahyar | seawater d18O (sl-corr.) |
Change history:
2024-08-15T12:23:01 – This is version 2 of the dataset; the previous version doi:10.1594/PANGAEA.833322 contains errors
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2625 data points
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