Fig. 9: Paleoproductivity and sea-ice proxies for MIS 5–8. | Nature Communications

Fig. 9: Paleoproductivity and sea-ice proxies for MIS 5–8.

From: Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years

Fig. 9: Paleoproductivity and sea-ice proxies for MIS 5–8.

a Sea ice biomarker IPSO25/opal ratio57. b Biomarker HBI III/opal ratio. c IPSO25/HBI III ratio. d Total amount of sterols. Red curves show opal content. Measurements cover MIS 5–8 at Site U1537. T refers to glacial termination. Note that sea-ice indicators are inversely correlated to opal content and point to low sea-ice cover with open water conditions during times of elevated interglacial bioproductivity.

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