Fig. 3: Mineral solubility and export production in the South Pacific.
From: South Pacific carbon uptake controlled by West Antarctic Ice Sheet dynamics
a, Southeast Pacific Fe fluxes (red) for subantarctic core PS75/056-1 representing dust input10, and for core PS58/270-5. Grey line: high-resolution Fe flux record for PS58/270-5, calculated as described in the caption of Fig. 2. b, Mg–Ti (black) and Fe–Ti (grey) ratios of discrete sample digests. c, CIA (black) (CIA = Al2O3/[Al2O3 + CaO* + Na2O* + K2O] × 100, where CaO* and Na2O* represent lithogenic CaO and Na2O, respectively)44, calculated from discrete sample measurements superimposed on calibrated XRF scanner based Ti–Ca concentration data for PS58/270-5 (red-brown) (also Extended Data Fig. 5c,e). Data shown in b and c reflect changes in lithogenic particle maturity indicative of partial solubility. d, Opal (green) and Ba excess fluxes (black; Baxs: indicator for biogenic Ba deposition calculated as Baxs = Batotal – Balithogenic; Balithogenic calculated using thorium and titanium concentrations and upper continental crust values)72. e, Total carbon fluxes (Ctotal) as an indicator for organic carbon in core PS58/270-5. f, Ba/Fe as a qualitative indicator of export production in core PS75/072-414 and at ODP Site 1094 in the Southeast Atlantic13. g, Opal content in core PS75/059-2, indicating export production in the subantarctic Southeast Pacific9. h, Antarctic ice core record of atmospheric CO2 from EPICA Dome C65. Specific locations are shown in Fig. 1. Error bars are shown as propagated errors where they exceed the line thickness34. See Methods for more analytical details.
