We analysed: 1. TOC and CNS contents on sediment core PS69/274-1 and calculated the C/N-ratio and carbonate content of the individual sample depths. 2. a specific biomarker lipid called IPSO25 in sediment core PS69/274-1 from the western Amundsen Sea continental shelf, Antarctica, alongside a phytoplankton biomarker (dinosterol) for reconstructing palaeo-sea ice coverage. We further applied the PIPSO25 approach for semi-quantitative sea ice reconstructions. We analysed a specific biomarker lipid called IPSO25 in sediment core PS69/274-1 from the western Amundsen Sea continental shelf, Antarctica, alongside a phytoplankton biomarker (dinosterol) for reconstructing palaeo sea-ice coverage. We further applied the PIPSO25 approach for semi-quantitative sea-ice reconstructions.

Supplement to: Lamping, Nele; Müller, Juliane; Esper, Oliver; Hillenbrand, Claus-Dieter; Smith, James A; Kuhn, Gerhard (2020): Highly branched isoprenoids reveal onset of deglaciation followed by dynamic sea-ice conditions in the western Amundsen Sea, Antarctica. Quaternary Science Reviews, 228, 106103