Fig. 3From: Paleoceanography of the northwestern Pacific across the Early–Middle Pleistocene boundary (Marine Isotope Stages 20–18)Results of principal component analysis (PCA) compared to related geochemical proxies in the Chiba composite section, for a leading mode (PC1), b second mode (PC2), and c third mode (PC3). The geochemical proxies presented are standardized. Highlighted events are the same as for Fig. 2Back to article page