https://doi.pangaea.de/10.1594/PANGAEA.992006Pinho, Tainã Marcos LimaTainã Marcos LimaPinho0000-0001-6371-4498Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenNürnberg, DirkDirkNürnbergGEOMAR - Helmholtz Centre for Ocean Research KielMeckler, Anna NeleAnna NeleMeckler0000-0002-7225-8276Bjerknes Centre for Climate Research, Bergen, NorwayMollenhauer, GesineGesineMollenhauer0000-0001-5138-564XAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenMüller, JulianeJulianeMüller0000-0003-0724-4131Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenLohmann, GerritGerritLohmann0000-0003-2089-733XAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenLembke-Jene, LesterLesterLembke-Jene0000-0002-6873-8533Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenHidayat, SalmaSalmaHidayatUniversity of BremenRigalleau, VincentVincentRigalleau0009-0006-3837-9679Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenLamy, FrankFrankLamy0000-0001-5952-1765Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenTiedemann, RalfRalfTiedemann0000-0001-7211-8049Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenPANGAEA2026East AntarcticaEastern Weddell SeaGlacial Weddell PolynyaMg/CaNeogloboquadrina pachyderma sinistralWarm Deep Waterδ18Osw-ivcDEPTH, sediment/rockAGENeogloboquadrina pachyderma, Magnesium/Calcium ratioNeogloboquadrina pachyderma sinistral, Strontium/Calcium ratioNeogloboquadrina pachyderma sinistral, Barium/Calcium ratioNeogloboquadrina pachyderma sinistral, Aluminium/Calcium ratioNeogloboquadrina pachyderma sinistral, Iron/Calcium ratioNeogloboquadrina pachyderma sinistral, Manganese/Calcium ratioSub-surface temperatureδ18O, ice volume free, seawaterGravity corerInductively coupled plasma-optical emission spectrometry (ICP-OES), Varian 720-ES Axial; coupled to a VARIAN SP3 sample preparation systemCalculated from Mg/Ca ratiosCalculatedPS128PolarsternInternational Science Program for Integrative Research in Earth Systems (AWI_INSPIRES)2022-01-17T00:54:00Dataset10.1038/s41467-026-70498-w10.57738/BzPM_0764_20221797 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalMg/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).-5.587413-69.411694Weddell SeaAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhavenhttps://doi.org/10.13039/501100003207AWI_PS128_01Marine Geology