Supplement to: Hoefs, Marcel JL; Versteegh, Gerard J M; Rijpstra, W Irene C; de Leeuw, Jan W; Sinninghe Damsté, Jaap S (1998): Postdepositional oxic degradation of alkenones: Implications for the measurement of palaeo sea surface temperatures. Paleoceanography, 13(1), 42-49, https://doi.org/10.1029/97PA02893