Pinho, Tainã Marcos Lima; Nürnberg, Dirk; Meckler, Anna Nele; Mollenhauer, Gesine; Müller, Juliane; Lohmann, Gerrit; Lembke-Jene, Lester; Hidayat, Salma; Rigalleau, Vincent; Lamy, Frank; Tiedemann, Ralf (2026): Mg/Ca-based subsurface temperature and ice volume-corrected δ18O of seawater based on Neogloboquadrina pachyderma sinistral from the eastern Weddell Sea off Dronning Maud Land over the last 75 ka [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.992006 (DOI registration in progress)
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Published: 2026-02-19
Abstract:
Mg/Ca-based subsurface temperature (°C) and ice volume-corrected δ18O of seawater (δ18Osw-ivc; ‰ VSMOW) based on Neogloboquadrina pachyderma sinistral from eastern Weddell Sea sediment core PS128_2. The foraminiferal specimens were selected from gravity core PS128_2-3, which was recovered from Bungenstock Plateau (eastern Weddell Sea off Dronning Maud Land 69.4107°S, 5.5890°W ) from 1868 m water depth during R/V POLASTERN Cruise PS128 in 2022 (Tiedemann and Müller, 2022). Sampling and analytical studies were carried out from ~88 to 430 cm core depth at ~2 cm spatial resolution. The records cover the last ~74.5 kyrs. The geochemical analyses were performed on a VARIAN 720–ES Axial ICP-OES, a simultaneous, axial-viewing inductively coupled plasma optical emission spectrometer coupled to a VARIAN SP3 sample preparation system at GEOMAR. Mg/Ca ratios (mmol/mol) were converted into subsurface temperature (SubST; °C) . Contaminant phases are added: Sr/Ca, Ba/Ca, Al/Ca, Fe/Ca, Mn/Ca in mmol/mol).
Keyword(s):
Supplement to:
Pinho, Tainã Marcos Lima; Nürnberg, Dirk; Meckler, Anna Nele; Mollenhauer, Gesine; Müller, Juliane; Lohmann, Gerrit; Lembke-Jene, Lester; Hidayat, Salma; Rigalleau, Vincent; Lamy, Frank; Tiedemann, Ralf (2026): Millennial-to-orbital-scale subsurface ocean warming and Polynya formation off Dronning Maud Land during the last glacial. Nature Communications, 17(1), 2440, https://doi.org/10.1038/s41467-026-70498-w
References:
Tiedemann, Ralf; Müller, Juliane (2022): The Expedition PS128 of the Research Vessel POLARSTERN to the Weddell Sea, Lazarew Sea, Riiser-Larsen Sea, Cosmonaut Sea and Cooperation Sea in 2022. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 764, 235 pp, https://doi.org/10.57738/BzPM_0764_2022
Project(s):
Funding:
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AWI_PS128_01: Marine Geology
Coverage:
Latitude: -69.411694 * Longitude: -5.587413
Date/Time Start: 2022-01-17T00:54:00 * Date/Time End: 2022-01-17T00:54:00
Minimum DEPTH, sediment/rock: 0.885 m * Maximum DEPTH, sediment/rock: 4.295 m
Event(s):
PS128_2-3 * Latitude: -69.411694 * Longitude: -5.587413 * Date/Time: 2022-01-17T00:54:00 * Elevation: -1868.0 m * O2A Registry URI: https://registry.o2a-data.de/items/3165 * Location: Weddell Sea * Campaign: PS128 (EASI-1) * Basis: Polarstern * Method/Device: Gravity corer (GC)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Pinho, Tainã Marcos Lima | Geocode | |
| 2 | AGE | Age | ka BP | Pinho, Tainã Marcos Lima | Geocode | |
| 3 | Neogloboquadrina pachyderma, Magnesium/Calcium ratio | N. pachyderma Mg/Ca | mmol/mol | Pinho, Tainã Marcos Lima | Inductively coupled plasma-optical emission spectrometry (ICP-OES), Varian 720-ES Axial; coupled to a VARIAN SP3 sample preparation system | |
| 4 | Neogloboquadrina pachyderma sinistral, Strontium/Calcium ratio | N. pachyderma s Sr/Ca | mmol/mol | Pinho, Tainã Marcos Lima | Inductively coupled plasma-optical emission spectrometry (ICP-OES), Varian 720-ES Axial; coupled to a VARIAN SP3 sample preparation system | |
| 5 | Neogloboquadrina pachyderma sinistral, Barium/Calcium ratio | N. pachyderma sin B/Ca | mmol/mol | Pinho, Tainã Marcos Lima | Inductively coupled plasma-optical emission spectrometry (ICP-OES), Varian 720-ES Axial; coupled to a VARIAN SP3 sample preparation system | |
| 6 | Neogloboquadrina pachyderma sinistral, Aluminium/Calcium ratio | N. pachyderma s Al/Ca | mmol/mol | Pinho, Tainã Marcos Lima | Inductively coupled plasma-optical emission spectrometry (ICP-OES), Varian 720-ES Axial; coupled to a VARIAN SP3 sample preparation system | |
| 7 | Neogloboquadrina pachyderma sinistral, Iron/Calcium ratio | N. pachyderma s Fe/Ca | mmol/mol | Pinho, Tainã Marcos Lima | Inductively coupled plasma-optical emission spectrometry (ICP-OES), Varian 720-ES Axial; coupled to a VARIAN SP3 sample preparation system | |
| 8 | Neogloboquadrina pachyderma sinistral, Manganese/Calcium ratio | N. pachyderma s Mn/Ca | mmol/mol | Pinho, Tainã Marcos Lima | Inductively coupled plasma-optical emission spectrometry (ICP-OES), Varian 720-ES Axial; coupled to a VARIAN SP3 sample preparation system | |
| 9 | Sub-surface temperature | SubT | °C | Pinho, Tainã Marcos Lima | Calculated from Mg/Ca ratios | |
| 10 | δ18O, ice volume free, seawater | δ18O ivf sw | ‰ SMOW | Pinho, Tainã Marcos Lima | Calculated | δ18Osw-ivc |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1797 data points