Figure F4. Spectral analysis for the time interval 3.7–2.4 Ma. Time series analyses were performed with AnalySeries 1.2 (Paillard et al., 1996). A. delta18O, measured on benthic foraminifers (Tiedemann et al., this volume). B. Mg/Ca ratios, measured in foraminiferal tests of the planktonic foraminifer Globigerinoides sacculifer. C. delta18O, measured in foraminiferal tests of the planktonic foraminifer G. sacculifer. D. delta18Osalinity, calculated by subtracting the normalized delta18Obenthic record from the delta18Owater record.

Figure F4. Spectral analysis for the time interval 3.7–2.4 Ma. Time series analyses were performed with AnalySeries 1.2 (Paillard et al., 1996). A.

¹⁸O, measured on benthic foraminifers (Tiedemann et al., this volume). B. Mg/Ca ratios, measured in foraminiferal tests of the planktonic foraminifer Globigerinoides sacculifer. C.

¹⁸O, measured in foraminiferal tests of the planktonic foraminifer G. sacculifer. D.

¹⁸O_salinity, calculated by subtracting the normalized

¹⁸O_benthic record from the

¹⁸O_water record.