PANGAEA_992006 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 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 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 2026-02-19 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.992006 Investigator Tainã Marcos Lima Pinho taina.pinho@awi.de Earth Science DEPTH, sediment/rock AGE Neogloboquadrina pachyderma, Magnesium/Calcium ratio Neogloboquadrina pachyderma sinistral, Strontium/Calcium ratio Neogloboquadrina pachyderma sinistral, Barium/Calcium ratio Neogloboquadrina pachyderma sinistral, Aluminium/Calcium ratio Neogloboquadrina pachyderma sinistral, Iron/Calcium ratio Neogloboquadrina pachyderma sinistral, Manganese/Calcium ratio Sub-surface temperature δ18O, ice volume free, seawater geoscientificInformation East Antarctica Eastern Weddell Sea Glacial Weddell Polynya Gravity corer Mg/Ca Neogloboquadrina pachyderma sinistral PS128 PS128_2-3 Warm Deep Water δ18Osw-ivc Inductively coupled plasma-optical emission spectrometry (ICP-OES), Varian 720-ES Axial; coupled to a VARIAN SP3 sample preparation system Calculated from Mg/Ca ratios Calculated Polarstern 2022-01-17 2022-01-17 Complete -69.411694 -69.411694 -5.587413 -5.587413 0.885 m (DEPTH, sediment/rock) 4.295 m (DEPTH, sediment/rock) AWI_INSPIRES International Science Program for Integrative Research in Earth Systems unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 1797 data points text/tab-separated-values 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 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

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). ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.992006"!

http://en.wikipedia.org/wiki/Kyr AGE https://doi.org/10.1038/s41467-026-70498-w Millennial-to-orbital-scale subsurface ocean warming and Polynya formation off Dronning Maud Land during the last glacial https://doi.org/10.17815/jlsrf-3-163 Polarstern https://doi.org/10.57738/BzPM_0764_2022 PS128 https://doi.org/10.57738/BzPM_0764_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 DIF 9.4 2026-02-19 2026-03-20