PANGAEA_994064 Stable isotopes and bottom water oxygenation changes at ODP Site 202-1233 during Antarctic Isotope Maximum 8 Nadar, Pushpak Martin John; Kleiven, Helga F; Ninnemann, Ulysses S; Irvalı, Nil Stable isotopes and bottom water oxygenation changes at ODP Site 202-1233 during Antarctic Isotope Maximum 8 2026-05-07 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.994064 Investigator Pushpak Martin John Nadar pushpak.nadar@uib.no Earth Science Event label Sample code/label DEPTH, sediment/rock Depth, composite AGE Globobulimina affinis, δ18O Globobulimina affinis, δ18O standard error Globobulimina affinis, δ13C Globobulimina affinis, δ13C standard error Cibicidoides wuellerstorfi, δ18O Cibicidoides wuellerstorfi, δ13C Bottom water oxygen Bottom water oxygen, error geoscientificInformation 202-1233B 202-1233C 202-1233D AAIW Drilling/drill rig Leg202 ODP Site 202-1233 Oxygen concentration South East Pacific Stable carbon isotopes δ13C Stable oxygen isotope Δδ13C DSDP/ODP/IODP sample designation Intercore correlation Antarctic ice core chronology (AICC2023) Mass spectrometer, Finnigan, MAT 253 Calculated Joides Resolution 2002-04-12 2002-04-13 Complete -41.00015 -41.00001 -74.44996 -74.44985 45.52 m (DEPTH, sediment/rock) 5328.0 m (DEPTH, sediment/rock) access rights needed CC-BY-4.0: Creative Commons Attribution 4.0 International (License comes into effect after moratorium ends) 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 1839 data points text/tab-separated-values Bouchet, Marie; Landais, Amaëlle; Grisart, Antoine; Parrenin, Frédéric; Prié, Frédéric; Jacob, Roxanne; Fourré, Elise; Capron, Emilie; Raynaud, Dominique; Lipenkov, Vladimir Ya; Loutre, Marie-France; Extier, Thomas; Svensson, Anders M; Legrain, Etienne; Martinerie, Patricia; Leuenberger, Markus Christian; Jiang, Wei; Ritterbusch, Florian; Lu, Zheng-Tian; Yang, Guo-Min (2023): The Antarctic Ice Core Chronology 2023 (AICC2023) chronological framework and associated timescale for the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core. Climate of the Past, 19(11), 2257-2286, https://doi.org/10.5194/cp-19-2257-2023 Hoogakker, Babette A A; Davis, Catherine V; Wang, Yi; Kusch, Stephanie; Nilsson-Kerr, Katrina; Hardisty, Dalton S; Jacobel, Allison W; Reyes Macaya, Dharma; Glock, Nicolaas; Ni, Sha; Sepúlveda, Julio; Ren, Abby; Auderset, Alexandra; Hess, Anya V; Meissner, Katrin J; Cardich, Jorge; Anderson, Robert; Barras, Christine; Basak, Chandranath; Bradbury, Harold J; Brinkmann, Inda; Castillo, A; Cook, M; Costa, Kassandra M; Choquel, Constance; Diz, Paula; Donnenfield, Jonas T; Elling, Felix J; Erdem, Zeynep; Filipsson, Helena L; Garrido, Sebastián; Gottschalk, Julia; Govindankutty Menon, Anjaly; Groeneveld, Jeroen; Hallmann, Christian; Hendy, Ingrid L; Hennekam, Rick; Lu, Wanyi; Lynch-Stieglitz, Jean; Matos, Lelia; Martínez-García, Alfredo; Molina, Giulia Silveira; Muñoz, Praxedes; Moretti, Simone; Morford, J L; Nuber, Sophie; Radionovskaya, Svetlana; Raven, Morgan Reed; Somes, Christopher J; Studer, Anja S; Tachikawa, Kazuyo; Tapia, Raúl; Tetard, Martin; Vollmer, Tyler; Wang, Xingchen; Wu, Shuzhuang; Zhang, Yan; Zheng, Xin-Yuan; Zhou, Yuxin (2025): Reviews and syntheses: Review of proxies for low-oxygen paleoceanographic reconstructions. Biogeosciences, 22(4), 863-957, https://doi.org/10.5194/bg-22-863-2025 Kaiser, Jérôme; Lamy, Frank (2010): Links between Patagonian Ice Sheet fluctuations and Anarctic dust variability during the last glacial period (MIS 4-2). Quaternary Science Reviews, 29(11-12), 1464-1471, https://doi.org/10.1016/j.quascirev.2010.03.005 Lamy, Frank; Kaiser, Jérôme; Arz, Helge Wolfgang; Hebbeln, Dierk; Ninnemann, Ulysses S; Timm, Oliver; Timmermann, Axel; Toggweiler, J Robbie (2007): Modulation of the bipolar seesaw in the Southeast Pacific during Termination 1. Earth and Planetary Science Letters, 259(3-4), 400-413, https://doi.org/10.1016/j.epsl.2007.04.040 Lamy, Frank; Kaiser, Jérôme; Ninnemann, Ulysses S; Hebbeln, Dierk; Arz, Helge Wolfgang; Stoner, Joseph S (2004): Antarctic timing of surface water changes off Chile and Patagonian ice-sheet response. Science, 304(5679), 1959-1962, https://doi.org/10.1126/science.1097863

This dataset contains benthic foraminiferal stable carbon (δ13C) and oxygen (δ18O) isotope measurements from the Ocean Drilling Program Site 1233, located on the continental slope off southern Chile in the Southeast Pacific Ocean (41°S, 74°W; 838 m water depth). The stable isotope measurements were performed on the epifaunal species Cibicidoides wuellerstorfi and the infaunal species Globobulimina affinis, picked from the >150 µm size fraction, from the 58–74 m composite depth interval, corresponding to Antarctic Isotope Maximum 8 (~37–39.4 ka). The 2 cm sampling resolution provides sub-centennial temporal resolution (~15 years per sample) based on the age model constrained by radiocarbon dating (Lamy et al. 2004, 2007; Kaiser and Lamy, 2010) and stratigraphic alignment to the Antarctic Ice Core Chronology 2023 (Bouchet et al., 2023). Stable isotope measurements were performed on cleaned foraminiferal calcite using a Finnigan MAT 253 mass spectrometer, and values are reported relative to the Vienna Pee Dee Belemnite standard. Replicate analyses were conducted for Globobulimina affinis where material permitted, while Cibicidoides wuellerstorfi was measured once per sample. All samples were analyzed at the FARLAB (Facility for advanced isotopic research and monitoring of weather, climate and biogeochemical cycling, Department of Earth Science, University of Bergen, Norway). The dataset also includes reconstructed bottom water oxygen concentrations derived from the carbon isotope offset between the two species using an established empirical relationship (Hoogakker et al., 2025). The data were generated to document changes in intermediate water properties in the Southeast Pacific during Antarctic Isotope Maximum 8. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.994064"!

http://en.wikipedia.org/wiki/Kyr AGE https://doi.org/10.1016/j.epsl.2007.04.040 Modulation of the bipolar seesaw in the Southeast Pacific during Termination 1 https://doi.org/10.1016/j.quascirev.2010.03.005 Links between Patagonian Ice Sheet fluctuations and Anarctic dust variability during the last glacial period (MIS 4-2) https://doi.org/10.1126/science.1097863 Antarctic timing of surface water changes off Chile and Patagonian ice-sheet response https://doi.org/10.5194/bg-22-863-2025 Reviews and syntheses: Review of proxies for low-oxygen paleoceanographic reconstructions https://doi.org/10.5194/cp-19-2257-2023 Antarctic ice core chronology (AICC2023) https://doi.org/10.5194/cp-19-2257-2023 The Antarctic Ice Core Chronology 2023 (AICC2023) chronological framework and associated timescale for the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core https://hdl.handle.net/10013/epic.27914.d001 DSDP/ODP/IODP sample designation https://www-odp.tamu.edu:443/resolutn.html Joides Resolution DIF 9.4 2026-05-07 2026-05-07