Fig. 3
From: Reduced marine phytoplankton sulphur emissions in the Southern Ocean during the past seven glacials
Variability of residual nssSO42− flux at Dome Fuji (DF), Dome C (EDC), and Dronning Maud Land (EDML). a Residual nssSO42− flux at DF and EDC for the past 720,000 years, calculated by subtracting the terrestrial CaSO4 contribution from the nssSO42− flux. The EDC flux is plotted on the AICC12 timescale53,54 using previously published ion data7,8,9,16 and accumulation rates53,54. b δ18O at DF over the past 720,000 years14,15. Gray bar indicates the thresholds (Fig. 2a). Marine isotope stage numbers for interglacials are also shown. c Residual nssSO42− at DF, EDC, and EDML calculated by subtracting the terrestrial CaSO4 contribution from the nssSO42− flux. The EDC and EDML fluxes are plotted on the AICC12 timescale53,54 using previously published ion data7,8,9,16 and accumulation rates53,54. d The δ18O values at DF14 for the past 150,000 years. All ion and δ18O values are averages over 1000 years
