At Site GS15-198-38, Greenland Sea, we analysed the surface sample (from a multicore) and eight Late Quaternary samples from a Calypso core. The age model for the Calypso core GS15-198-38CC is based on seven AMS 14C ages down to 345 cm, and a 5-cm resolution N. pachyderma sinistral isotope stratigraphy (1) below that level. We analysed the palynology, generated organic biomarker data (including IP25, sterols) and performed quantitative PCR (droplet digital PCR, ddPCR) of the sympagic dinoflagellate Polarella glacialis.

The main funding for this project came from:Research Council of Norway project 268062 (Environmental ancient DNA as proxy for sea ice reconstructions - aDNAPROX)Research Council of Norway project 273455/E10 (KLIMAFORSK mobility) Additional funding came from:Bjerknes Centre for Climate ResearchNatural Environment Research Council (NERC) Independent Research Fellowship NE/L011956/1Lord Kelvin Adam Smith Leadership Fellowship (University of Glasgow)European Research Council under the European Community's Seventh Framework Program (FP7/2007-2013) / ERC grant agreement 610055 as part of the ice2ice project

Supplement to: De Schepper, Stijn; Ray, Jessica L; Skaar, Katrine S; Sadatzki, Henrik; Ijaz, Umer Zeeshan; Stein, Ruediger; Larsen, Aud (2019): The potential of sedimentary ancient DNA for reconstructing past sea ice evolution. The ISME Journal