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. 2016 Jul 26;7:12247. doi: 10.1038/ncomms12247

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Comparison of P_BIP₂₅ and P_DIP₂₅ signals of sediment core JM11-FI-19PC (GICC05-timescale) and sediment core MSM5/5-712-2 (calibrated age scale) from the Svalbard margin published by Müller and Stein¹⁷. For H-event 1 (blue bar), characterized by IP₂₅ and brassicasterol (as well as dinosterol) values of close to or zero (that is, ‘zero divided by zero'), per definition maximum P_BIP₂₅ and P_DIP₂₅ values of 1 were assumed (for background see refs ¹⁵, ²⁶). For core locations, see Fig. 1. BA, Bølling and Allerød interstadial; H, H-event; HS, Heinrich stadial; LGM, Last Glacial maximum; YD, Younger Dryas.