Nadar Pushpak Martin John pushpak.nadar@uib.no 0000-0002-6630-7764 Bjerknes Centre for Climate Research, Bergen, Norway BCCR http://www.bjerknes.uib.no/ https://ror.org/011n96f14 Kleiven Helga F kikki@uib.no 0000-0002-4956-6182 Bjerknes Centre for Climate Research, Bergen, Norway BCCR http://www.bjerknes.uib.no/ https://ror.org/011n96f14 Ninnemann Ulysses S ulysses.ninnemann@uib.no Bjerknes Centre for Climate Research, Bergen, Norway BCCR http://www.bjerknes.uib.no/ https://ror.org/011n96f14 Irvalı Nil nil.irvali@uib.no 0000-0001-5723-5781 Bjerknes Centre for Climate Research, Bergen, Norway BCCR http://www.bjerknes.uib.no/ https://ror.org/011n96f14 2026 Stable isotopes and bottom water oxygenation changes at ODP Site 202-1233 during Antarctic Isotope Maximum 8 dataset https://doi.pangaea.de/10.1594/PANGAEA.994064 2026-05-07T11:05:46 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. Bouchet Marie marie.bouchet@lsce.ipsl.fr 0009-0002-0760-1776 Landais Amaëlle amaelle.landais@lsce.ipsl.fr 0000-0002-5620-5465 Grisart Antoine antantoine.grisart@gmail.com 0000-0003-4594-5596 Parrenin Frédéric frederic.parrenin@univ-grenoble-alpes.fr 0000-0002-9489-3991 Prié Frédéric frederic.prie@lsce.ipsl.fr Jacob Roxanne roxanne.jacob@lsce.ipsl.fr Fourré Elise elise.fourre@lsce.ipsl.fr Capron Emilie emilie.capron@univ-grenoble-alpes.fr 0000-0003-0784-1884 Raynaud Dominique dominique.raynaud2@univ-grenoble-alpes.fr Lipenkov Vladimir Ya lipenkov@aari.ru 0000-0003-4221-5440 Loutre Marie-France marie-france.loutre@unibe.ch 0000-0001-6944-4038 Extier Thomas thomas.extier@u-bordeaux.fr 0000-0002-9531-8753 Svensson Anders M as@nbi.ku.dk 0000-0002-4364-6085 Legrain Etienne etienne.legrain@ulb.be Martinerie Patricia patricia.martinerie@univ-grenoble-alpes.fr 0000-0002-6820-2296 Leuenberger Markus Christian markus.leuenberger@unibe.ch 0000-0003-4299-6793 Jiang Wei wjiang1@ustc.edu.cn 0000-0002-6355-7637 Ritterbusch Florian florian@ustc.edu.cn Lu Zheng-Tian ztlu@ustc.edu.cn Yang Guo-Min yanggm@mail.ustc.edu.cn 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 journal article Climate of the Past 19(11) https://doi.org/10.5194/cp-19-2257-2023 2257-2286 Hoogakker Babette A A b.hoogakker@hw.ac.uk 0000-0002-8171-9679 Davis Catherine V catherinedavis@ncsu.edu 0000-0003-4279-5369 Wang Yi ywang@whoi.edu 0000-0001-5633-3312 Kusch Stephanie stephanie.kusch@uni-koeln.de http://www.geologie.uni-koeln.de/1953.html 0000-0002-2708-4975 Nilsson-Kerr Katrina katrina.nilsson-kerr@uib.no 0000-0001-7379-2684 Hardisty Dalton S Jacobel Allison W Ajacobel@middlebury.edu 0000-0002-1036-9026 Reyes Macaya Dharma Glock Nicolaas nglock@geomar.de Ni Sha shanwd.ns@gmail.com 0000-0002-5760-0088 Sepúlveda Julio jsepulveda@colorado.edu 0000-0002-8251-6937 Ren Abby Auderset Alexandra a.auderset@soton.ac.uk 0000-0002-6316-4980 Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Meissner Katrin J 0000-0002-0716-7415 Cardich Jorge 0000-0001-8175-2789 Anderson Robert Barras Christine christine.barras@univ-angers.fr Basak Chandranath cbasak@udel.edu 0000-0002-9410-0074 Bradbury Harold J hjb62@cam.ac.uk 0000-0002-6937-9755 Brinkmann Inda Castillo A Cook M Costa Kassandra M kassandra.costa@whoi.edu 0000-0001-8715-638X Choquel Constance constance.choquel@gmail.com 0000-0001-8346-2726 Diz Paula pauladiz@uvigo.es 0000-0002-7136-0690 Donnenfield Jonas T Elling Felix J felling@leibniz.uni-kiel.de 0000-0003-0405-4033 Erdem Zeynep zeyerdem@gmail.com 0000-0002-5509-8733 Filipsson Helena L Helena.filipsson@geol.lu.se 0000-0001-7200-8608 Garrido Sebastián sebagarridomedina@gmail.com 0000-0001-9654-4827 Gottschalk Julia julia.gottschalk@ifg.uni-kiel.de 0000-0002-0403-3059 Govindankutty Menon Anjaly Groeneveld Jeroen jgroneneveld@uni.bremen.de 0000-0002-8382-8019 Hallmann Christian challman@gfz-potsdam.de 0000-0003-3696-7371 Hendy Ingrid L 0000-0001-8305-6752 Hennekam Rick rick.hennekam@nioz.nl 0000-0002-8823-4519 Lu Wanyi wlu@whoi.edu 0000-0002-2837-654X Lynch-Stieglitz Jean jean@eas.gatech.edu 0000-0002-9353-1972 Matos Lelia lmatos@marum.de 0000-0003-1417-5509 Martínez-García Alfredo a.martinez-garcia@mpic.de Molina Giulia Silveira giuliamolina@gmail.com 0000-0001-7992-8298 Muñoz Praxedes 0000-0002-0402-681X Moretti Simone Simone.Moretti@mpic.de 0000-0002-6772-7269 Morford J L 0000-0003-4882-6576 Nuber Sophie sophie.nuber@hotmail.de 0000-0002-5141-361X Radionovskaya Svetlana s.m.radionovskaya@gmail.com Raven Morgan Reed Somes Christopher J csomes@geomar.de 0000-0003-2635-7617 Studer Anja S anja.studer@unibas.ch https://duw.unibas.ch/de/bgc/team/studer/ 0000-0001-7354-8497 Tachikawa Kazuyo kazuyo@cerege.fr http://www.cerege.fr/tracorga/TACHIKAWA/tachikawa.html 0000-0002-9522-8600 Tapia Raúl rauck.tapia@gmail.com 0000-0002-2620-7355 Tetard Martin Vollmer Tyler tyler.vollmer@eas.gatech.edu Wang Xingchen wxc514033464@163.com 0000-0001-5316-789X Wu Shuzhuang shuzhuang.wu@awi.de 0000-0002-5134-8395 Zhang Yan 0000-0001-9078-7123 Zheng Xin-Yuan 0000-0002-7959-8046 Zhou Yuxin xiaoxin.yo@gmail.com 0000-0002-3523-8524 2025 Reviews and syntheses: Review of proxies for low-oxygen paleoceanographic reconstructions journal article Biogeosciences 22(4) https://doi.org/10.5194/bg-22-863-2025 863-957 Kaiser Jérôme jerome.kaiser@io-warnemuende.de 0000-0002-0290-9088 Lamy Frank frank.lamy@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/frank-lamy.html 0000-0001-5952-1765 2010 Links between Patagonian Ice Sheet fluctuations and Anarctic dust variability during the last glacial period (MIS 4-2) journal article Quaternary Science Reviews 29(11-12) https://doi.org/10.1016/j.quascirev.2010.03.005 1464-1471 Lamy Frank frank.lamy@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/frank-lamy.html 0000-0001-5952-1765 Kaiser Jérôme jerome.kaiser@io-warnemuende.de 0000-0002-0290-9088 Arz Helge Wolfgang helge.arz@io-warnemuende.de 0000-0002-1997-1718 Hebbeln Dierk dhebbeln@marum.de 0000-0001-5099-6115 Ninnemann Ulysses S ulysses.ninnemann@uib.no Timm Oliver Timmermann Axel axel@hawaii.edu 0000-0003-0657-2969 Toggweiler J Robbie robbie.toggweiler@noaa.gov 0000-0001-6345-5756 2007 Modulation of the bipolar seesaw in the Southeast Pacific during Termination 1 journal article Earth and Planetary Science Letters 259(3-4) https://doi.org/10.1016/j.epsl.2007.04.040 400-413 Lamy Frank frank.lamy@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/frank-lamy.html 0000-0001-5952-1765 Kaiser Jérôme jerome.kaiser@io-warnemuende.de 0000-0002-0290-9088 Ninnemann Ulysses S ulysses.ninnemann@uib.no Hebbeln Dierk dhebbeln@marum.de 0000-0001-5099-6115 Arz Helge Wolfgang helge.arz@io-warnemuende.de 0000-0002-1997-1718 Stoner Joseph S joe.stoner@oregonstate.edu 0000-0002-4848-5452 2004 Antarctic timing of surface water changes off Chile and Patagonian ice-sheet response journal article Science 304(5679) https://doi.org/10.1126/science.1097863 1959-1962 -74.44996 -74.44985 -41.00015 -41.00001 -74.44989 -41.00007 2002-04-12T13:45:00 2002-04-13T17:15:00 45.52 5328.0 vertical profile 202-1233B -41.00001 -74.44996 South Pacific Ocean -837.5 2002-04-12T13:45:00 2002-04-12T22:00:00 Leg202 Leg202 2002-04-08T00:00:00 2002-04-08 2002-06-07T00:00:00 2002-06-07 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Tiedemann, Ralf Tiedemann, Ralf doi:10.2973/odp.proc.ir.202.2003 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Drilling/drill rig DRILL 109.5 m 102.01 m 11 core; 100 m cored; 9.5 m drilled; 102 % recovery 202-1233C -41.00005 -74.44986 South Pacific Ocean -837.7 2002-04-12T22:00:00 2002-04-13T07:45:00 Leg202 Leg202 2002-04-08T00:00:00 2002-04-08 2002-06-07T00:00:00 2002-06-07 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Tiedemann, Ralf Tiedemann, Ralf doi:10.2973/odp.proc.ir.202.2003 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Drilling/drill rig DRILL 116.3 m 121.75 m 13 cores; 116.3 m cored; 0 m drilled; 104.7 % recovery 202-1233D -41.00015 -74.44985 South Pacific Ocean -839.2 2002-04-13T07:45:00 2002-04-13T17:15:00 Leg202 Leg202 2002-04-08T00:00:00 2002-04-08 2002-06-07T00:00:00 2002-06-07 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Tiedemann, Ralf Tiedemann, Ralf doi:10.2973/odp.proc.ir.202.2003 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Drilling/drill rig DRILL 112.3 m 114.88 m 13 cores; 110.3 m cored; 2 m drilled; 104.2 % recovery 1839 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Event label Event Nadar Pushpak Martin John pushpak.nadar@uib.no 0000-0002-6630-7764 Event Sample code/label Sample label DSDP/ODP/IODP sample designation hdl:10013/epic.27914.d001 Nadar Pushpak Martin John pushpak.nadar@uib.no 0000-0002-6630-7764 Sample label DEPTH, sediment/rock Depth sed m depth http://purl.obolibrary.org/obo/PATO_0001595 sediment http://purl.obolibrary.org/obo/ENVO_00002007 rock Length L http://dbpedia.org/resource/Length Nadar Pushpak Martin John pushpak.nadar@uib.no 0000-0002-6630-7764 mbsf Depth sed [m] Depth, composite Depth comp mcd depth http://purl.obolibrary.org/obo/PATO_0001595 Luminous Intensity J http://dbpedia.org/resource/Luminous_intensity Intercore correlation Nadar Pushpak Martin John pushpak.nadar@uib.no 0000-0002-6630-7764 Depth comp [mcd] AGE Age ka BP http://en.wikipedia.org/wiki/Kyr age http://purl.obolibrary.org/obo/PATO_0000011 Time T http://dbpedia.org/resource/Time Antarctic ice core chronology (AICC2023) https://doi.org/10.5194/cp-19-2257-2023 Nadar Pushpak Martin John pushpak.nadar@uib.no 0000-0002-6630-7764 Age [ka BP] Globobulimina affinis, δ18O G. affinis δ18O ‰ PDB Globobulimina affinis https://www.marinespecies.org/aphia.php?p=taxdetails&id=113060 δ18O http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes Mass spectrometer, Finnigan, MAT 253 Chromatographs & spectrometers Thermo Fisher Scientific MAT 253 isotope ratio mass spectrometer http://vocab.nerc.ac.uk/collection/L22/current/TOOL2142/ Nadar Pushpak Martin John pushpak.nadar@uib.no 0000-0002-6630-7764 vs. VPDB, size fraction >150 µm G. affinis δ18O [‰ PDB] Globobulimina affinis, δ18O standard error G. affinis δ18O std e ± Globobulimina affinis https://www.marinespecies.org/aphia.php?p=taxdetails&id=113060 δ18O http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes Calculated Nadar Pushpak Martin John pushpak.nadar@uib.no 0000-0002-6630-7764 standard error of the mean G. affinis δ18O std e [±] Globobulimina affinis, δ13C G. affinis δ13C ‰ PDB Globobulimina affinis https://www.marinespecies.org/aphia.php?p=taxdetails&id=113060 δ13C http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes Mass spectrometer, Finnigan, MAT 253 Chromatographs & spectrometers Thermo Fisher Scientific MAT 253 isotope ratio mass spectrometer http://vocab.nerc.ac.uk/collection/L22/current/TOOL2142/ Nadar Pushpak Martin John pushpak.nadar@uib.no 0000-0002-6630-7764 vs. VPDB, size fraction >150 µm G. affinis δ13C [‰ PDB] Globobulimina affinis, δ13C standard error G. affinis δ13C std e ± Globobulimina affinis https://www.marinespecies.org/aphia.php?p=taxdetails&id=113060 Calculated Nadar Pushpak Martin John pushpak.nadar@uib.no 0000-0002-6630-7764 standard error of the mean G. affinis δ13C std e [±] Cibicidoides wuellerstorfi, δ18O C. wuellerstorfi δ18O ‰ PDB Cibicidoides wuellerstorfi https://www.marinespecies.org/aphia.php?p=taxdetails&id=112890 δ18O http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes Mass spectrometer, Finnigan, MAT 253 Chromatographs & spectrometers Thermo Fisher Scientific MAT 253 isotope ratio mass spectrometer http://vocab.nerc.ac.uk/collection/L22/current/TOOL2142/ Nadar Pushpak Martin John pushpak.nadar@uib.no 0000-0002-6630-7764 vs. VPDB, size fraction >150 µm C. wuellerstorfi δ18O [‰ PDB] Cibicidoides wuellerstorfi, δ13C C. wuellerstorfi δ13C ‰ PDB Cibicidoides wuellerstorfi https://www.marinespecies.org/aphia.php?p=taxdetails&id=112890 δ13C http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes Mass spectrometer, Finnigan, MAT 253 Chromatographs & spectrometers Thermo Fisher Scientific MAT 253 isotope ratio mass spectrometer http://vocab.nerc.ac.uk/collection/L22/current/TOOL2142/ Nadar Pushpak Martin John pushpak.nadar@uib.no 0000-0002-6630-7764 vs. VPDB, size fraction >150 µm C. wuellerstorfi δ13C [‰ PDB] Bottom water oxygen BWO µmol/kg Molar Concentration Calculated Nadar Pushpak Martin John pushpak.nadar@uib.no 0000-0002-6630-7764 BWO [µmol/kg] Bottom water oxygen, error BWO e ± Calculated Nadar Pushpak Martin John pushpak.nadar@uib.no 0000-0002-6630-7764 BWO e [±] CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels AAIW ODP Site 202-1233 Oxygen concentration South East Pacific Stable carbon isotopes δ13C Stable oxygen isotope Δδ13C author100633 author101369 author103036 author105 author10519 author105275 author10533 author10708 author107870 author107922 author108197 author10825 author111172 author111175 author112052 author112704 author112738 author112739 author112740 author112741 author117436 author21351 author21837 author22609 author23170 author27086 author27673 author27674 author27675 author27683 author27741 author27868 author28044 author28120 author28891 author30639 author30652 author31047 author31118 author34246 author34838 author35601 author36671 author37104 author37196 author37876 author41391 author47816 author50919 author50947 author51818 author52989 author53021 author53621 author55139 author57132 author58512 author58913 author59399 author60638 author63988 author64057 author64403 author64516 author65262 author65812 author66169 author67313 author67807 author67811 author69034 author69462 author70776 author71710 author73394 author74837 author75984 author76294 author77976 author83017 author85392 author85868 author86433 author86434 author86435 author86436 author86437 author896 author91044 author91612 author98049 basis5 campaign21714 campaign3384341 curlevel30 event2106478 event2106479 event2106480 geocode1 geocode1599 geocode1600 geocode1601 geocode2205 geocode8128 inst2010 journal13626 journal14481 journal2146 journal3567 journal4644 license21 method10974 method15733 method50 method5059 method6174 method64 param116 param117 param2 param30324 param30325 param522970 param522974 param563167 param563168 param790 pi117436 ref119354 ref135441 ref26311 ref27744 ref32489 term1045260 term1045406 term1073089 term1073093 term1073131 term1073135 term21005 term38263 term4047470 term41056 term43863 term43884 term43975 term44030 term50361 term60857 term68027 term71049 term75317 term75490 term77994 term77995 topotype3