Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Woods Hole Oceanographic Institution WHOI https://ror.org/03zbnzt98 George Mason University https://ror.org/02jqj7156 Wang Shouyi 0000-0002-9046-6474 Woods Hole Oceanographic Institution WHOI https://ror.org/03zbnzt98 University of Colorado, Boulder https://ror.org/02ttsq026 Ummenhofer Caroline C Woods Hole Oceanographic Institution WHOI https://ror.org/03zbnzt98 Rosenthal Yair rosentha@marine.rutgers.edu 0000-0002-7546-6011 The State University of New Jersey Rutgers http://www.rutgers.edu/ https://ror.org/05vt9qd57 Oppo Delia W doppo@whoi.edu 0000-0003-2946-5904 Woods Hole Oceanographic Institution WHOI https://ror.org/03zbnzt98 2026 Last millennium thermocline temperature reconstructions from the Indonesian Throughflow based on planktonic foraminifera (Pulleniatina obliquiloculata) Mg/Ca dataset https://doi.pangaea.de/10.1594/PANGAEA.993402 2026-04-14T15:06:51 This data accompanies Hess et al. (2026, Science Advances). It consists of Last Millennium (750 CE to present) Mg/Ca and other trace elemental measurements from a thermocline-dwelling planktonic foraminifera (Pulleniatina obliquiloculata) from the Indonesian Seas. Sediment cores BJ8-03 31MC and BJ8-03 32GGC are from the Makassar Strait and BJ8-03 6MC and BJ8-03 7GGC from the Java Sea. Mg/Ca values from Site BJ8-03 31MC have been corrected for analytical offsets from BJ8-03 32GGC. Hess et al. (2026) used temperatures derived using the species-specific calibrations of Hollstein et al. (2017), though those derived using the multi-species equation from Anand et al. (2003) are also provided. Ages were generated using geoChronR (McKay et al., 2021). Anand Pallavi pallavi.anand@open.ac.uk 0000-0002-3159-0096 Elderfield Henry he101@esc.cam.ac.uk http://www.esc.cam.ac.uk/people/academic-staff/harry-elderfield Conte Maureen H mconte@whoi.edu 2003 Calibration of Mg/Ca thermometry in planktonic foraminifera from a sediment trap time series journal article Paleoceanography 18(2) https://doi.org/10.1029/2002PA000846 1050 Esswein Katherine Lee 2012 Patterns of climate variability in the western equatorial Pacific during the Common Era dissertation Rutgers University-Graduate School-New Brunswick Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Ummenhofer Caroline C Rosenthal Yair rosentha@marine.rutgers.edu 0000-0002-7546-6011 Oppo Delia W doppo@whoi.edu 0000-0003-2946-5904 in review A Strong Pacific Walker Circulation During the Little Ice Age journal article Hollstein Martina mhollstein@marum.de 0000-0002-5899-9959 Mohtadi Mahyar mmohtadi@marum.de 0000-0003-3306-0969 Rosenthal Yair rosentha@marine.rutgers.edu 0000-0002-7546-6011 Moffa-Sanchez Paola paola.l.moffa-sanchez@durham.ac.uk 0000-0003-1857-8954 Oppo Delia W doppo@whoi.edu 0000-0003-2946-5904 Martínez-Méndez Gema 0000-0001-7950-6837 Steinke Stephan ssteinke@xmu.edu.cn Hebbeln Dierk dhebbeln@marum.de 0000-0001-5099-6115 2017 Stable Oxygen Isotopes and Mg/Ca in Planktic Foraminifera From Modern Surface Sediments of the Western Pacific Warm Pool: Implications for Thermocline Reconstructions journal article Paleoceanography 32(11) https://doi.org/10.1002/2017PA003122 1174-1194 McKay Nicholas 0000-0003-3598-5113 Emile-Geay J 0000-0001-5920-4751 Khider D 0000-0001-7501-8430 2021 geoChronR – an R package to model, analyze, and visualize age-uncertain data journal article Geochronology (GChron) 3(1) https://doi.org/10.5194/gchron-3-149-2021 149-169 Newton A 0000-0003-4062-876X Thunell Robert C https://en.wikipedia.org/wiki/Robert_Thunell Stott Lowell D stott@usc.edu 0000-0002-2025-0731 2006 Climate and hydrographic variability in the Indo‐Pacific Warm Pool during the last millennium journal article Geophysical Research Letters 33(19) https://doi.org/10.1029/2006GL027234 2006GL027234 Oppo Delia W doppo@whoi.edu 0000-0003-2946-5904 Rosenthal Yair rosentha@marine.rutgers.edu 0000-0002-7546-6011 Linsley Braddock K blinsley@ldeo.columbia.edu 0000-0003-2085-0662 2009 2,000-year-long temperature and hydrology reconstructions from the Indo-Pacific warm pool journal article Nature 460(7259) https://doi.org/10.1038/nature08233 1113-1116 Rustic Gerald T Koutavas Athanasios 0000-0001-9484-1094 Marchitto Thomas M thomas.marchitto@colorado.edu 0000-0003-2397-8768 Linsley Braddock K blinsley@ldeo.columbia.edu 0000-0003-2085-0662 2015 Dynamical excitation of the tropical Pacific Ocean and ENSO variability by Little Ice Age cooling journal article Science 350(6267) https://doi.org/10.1126/science.aac9937 1537-1541 Steinke Stephan ssteinke@xmu.edu.cn Prange Matthias mprange@marum.de 0000-0001-5874-756X Feist Christin Groeneveld Jeroen jgroneneveld@uni.bremen.de 0000-0002-8382-8019 Mohtadi Mahyar mmohtadi@marum.de 0000-0003-3306-0969 2014 Upwelling variability off southern Indonesia over the past two millennia journal article Geophysical Research Letters 41(21) https://doi.org/10.1002/2014GL061450 7684-7693 115.3531 119.453967 -7.47765 -3.88325 117.2813274341314 -5.786659149700616 2003-07-01T00:00:00 2003-07-01T00:00:00 -920.0 -454.0 National Science Foundation NSF https://doi.org/10.13039/100000001 OCE-2303513 BJ8-03-6MC -7.470667 115.358833 -920.0 MultiCorer MUC BJ8-03-7GGC -7.47765 115.3531 -909.0 Gravity corer GC BJ8-03-31MC -3.88 119.454 -459.0 West Sulawesi margin MultiCorer MUC BJ8-03-32GGC -3.88325 119.452167 -454.0 Gravity corer GC 5792 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Event label Event Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Event Other event Other event Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Other event Campaign Campaign Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Campaign DATE/TIME Date/Time http://en.wikipedia.org/wiki/ISO_8601 Time T http://dbpedia.org/resource/Time Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Date/Time LATITUDE Latitude http://en.wikipedia.org/wiki/ISO_6709 Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Latitude LONGITUDE Longitude http://en.wikipedia.org/wiki/ISO_6709 Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Longitude ELEVATION Elevation m a.s.l. http://en.wikipedia.org/wiki/Elevation elevation http://purl.obolibrary.org/obo/PATO_0001687 Length L http://dbpedia.org/resource/Length Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Elevation [m a.s.l.] Device type Device Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Device Site Site site Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Site 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 Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Depth sed [m] Species Species https://en.wikipedia.org/wiki/Species species Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Species Size fraction Size fraction size http://purl.obolibrary.org/obo/PATO_0000117 Fraction Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 in µm Size fraction (in µm) Cleaning method Cleaning Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Cleaning Quality control QC Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 QC Magnesium/Calcium ratio Mg/Ca mmol/mol magnesium calcium Ca https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:22984 ratio Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 measured Mg/Ca [mmol/mol] (measured) Magnesium/Calcium ratio Mg/Ca mmol/mol magnesium calcium Ca https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:22984 ratio Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 corrected Mg/Ca [mmol/mol] (corrected) Age, median Age median ka age http://purl.obolibrary.org/obo/PATO_0000011 Time T http://dbpedia.org/resource/Time Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Age median [ka] Thermocline water temperature TWT °C Temperature Θ http://dbpedia.org/resource/Temperature Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 calibration according to Hollstein et al. (1997) TWT [°C] (calibration according to Holl...) Thermocline water temperature TWT °C Temperature Θ http://dbpedia.org/resource/Temperature Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 calibration according to Anand et al. (2003) TWT [°C] (calibration according to Anan...) Aluminium/Calcium ratio Al/Ca µmol/mol aluminium Al calcium Ca https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:22984 ratio Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Al/Ca [µmol/mol] Titanium/Calcium ratio Ti/Ca µmol/mol titanium Ti https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:33341 calcium Ca https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:22984 ratio Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Ti/Ca [µmol/mol] Manganese/Calcium ratio Mn/Ca µmol/mol manganese Mn https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:18291 calcium Ca https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:22984 ratio Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Mn/Ca [µmol/mol] Iron/Calcium ratio Fe/Ca µmol/mol calcium Ca https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:22984 ratio Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Fe/Ca [µmol/mol] Reference/source Reference Hess Anya V dranyahess@gmail.com 0000-0001-9272-2534 Reference CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels Foraminifera Indonesian Throughflow Little Ice Age medieval climate anomaly Mg/Ca Mg/Ca planktonic foraminifera Pacific Water Circulation Pulleniatina obliquiloculata Thermocline thermocline depth thermocline water temperature author105 author10780 author111175 author114520 author116541 author116542 author20126 author22620 author25825 author26232 author26233 author27683 author28355 author29622 author30011 author42633 author50743 author51083 author51084 author53024 author61342 author62422 author70591 author73749 author757 author774 author796 author919 award4024 curlevel30 event2616720 event3364110 event3364111 event3364112 funder20211 geocode1 geocode1599 geocode1600 geocode1601 geocode8128 inst20185 inst20490 inst20582 inst21614 journal11658 journal12511 journal14481 journal16991 journal6096 license21 method10668 method11107 param116832 param134113 param173003 param173004 param173005 param190071 param30323 param48491 param507541 param50814 param512410 param542721 param6857 param7053 param78085 param91392 pi111175 ref138978 ref138979 ref138980 ref138981 ref138982 ref138983 ref32126 ref65710 ref94937 term1073131 term1073135 term1073204 term1073934 term2663825 term28839 term37810 term38263 term38520 term38521 term38522 term40136 term40665 term41056 term43863 term43972 term43975 term44034 term47481 term49384 term49887 term542 term67453 term67890 term69321 term74480 term77383 term77384 term827 term828