EGU23-6631, updated on 10 Jan 2024
EGU General Assembly 2023
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

A marine record of Patagonian ice sheet changes over the past 140 ka

Julia Rieke Hagemann1,3, Frank Lamy1, Helge W. Arz2, Lester Lembke-Jene1, Alfredo Martínez-Garcia3, Alexandra Auderset3,4, Naomi Harada5, Ling Ho6, Shinya Iwasaki7, Jérôme Kaiser2, Carina B. Lange8,9,10, Murayama Masafumi11, Kana Nagashima5, Norbert Nowaczyk12, and Ralf Tiedemann1
Julia Rieke Hagemann et al.
  • 1Alfred-Wegener-Institute, Geoscience, Bremerhaven, Germany (;;;
  • 2Leibniz Institute for Baltic Sea Research, Warnemünde, Germany (;
  • 3Max Planck Institute for Chemistry, Climate Geochemistry, Mainz, Germany (;;
  • 4Department of Geosciences, Princeton University, Princeton, USA (
  • 5Atmospheric and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan (
  • 6Institute of Oceanography, National Taiwan University, Taipei, Taiwan (
  • 7MARUM, University Bremen, Bremen, Germany (
  • 8Department of Oceanography and Center for Oceanographic Research in the eastern South Pacific, COPAS Coastal, University of Concepción, Concepción, Chile (
  • 9Centro de Investigación Dinámica de Ecosistemas Marinos de Altas Latitudes, Universidad Austral de Chile, Valdivia, Chile (
  • 10Scripps Institution of Oceanography, University of California San Diego, La Jolla, USA (
  • 11Faculty of Agriculture and Marine Science, Kochi University, Kochi, Japane (
  • 12Climate Dynamics and Landscape Evolution, Helmholtz Centre Potsdam German Research Centre for Geosciences, Potsdam, Germany (

Terrestrial glacial records from the Patagonian Andes and New Zealand Alps document quasi-synchronous southern hemisphere-wide glacier advances during the late Quaternary. Although detailed, these records are inherently incomplete. Here, we provide a continuous marine record of Patagonian Ice Sheet (PIS) extent over a complete glacial/interglacial cycle back to the previous glacial (~140 ka). Sediment core MR16-09 PC03, located at 46° S and ~150 km offshore Chile, received high terrestrial sediment input when the PIS advanced westward. We use biomarkers, foraminiferal oxygen isotopes, and major element data for reconstructing terrestrial sediment and freshwater input related to PIS variations. Our sediment record documents four major intervals of general PIS advance, during Marine Isotope Stage (MIS) 6 (135 – 140 ka), late MIS 5 (~85 – 95 ka), MIS 4 (~60 – 70 ka) and late MIS 3 to MIS 2 (~18 – 40 ka). These higher terrigenous input intervals occur during sea-level low stands when the western PIS covered most of the Chilean fjords which today retain glaciofluvial sediments. Superimposed, high amplitude phases of enhanced sediment supply reoccur at millennial time scales and reflect marine-based phases of the PIS with direct sediment discharge to the continental slope. We assign the late MIS 3 to MIS 2 phases and, by inference, also older advances to Antarctic stadials, consistent with the terrestrial record. Concomitantly, we observe enhanced meltwater release and conclude that the temperature-controlled PIS advances during southern hemisphere cold phases were likely reinforced by higher precipitation through enhanced westerly winds at the northwestern margin of the PIS.

How to cite: Hagemann, J. R., Lamy, F., Arz, H. W., Lembke-Jene, L., Martínez-Garcia, A., Auderset, A., Harada, N., Ho, L., Iwasaki, S., Kaiser, J., Lange, C. B., Masafumi, M., Nagashima, K., Nowaczyk, N., and Tiedemann, R.: A marine record of Patagonian ice sheet changes over the past 140 ka, EGU General Assembly 2023, Vienna, Austria, 23–28 Apr 2023, EGU23-6631,, 2023.

Supplementary materials

Supplementary material file