Fig. 4From: Paleoceanography of the northwestern Pacific across the Early–Middle Pleistocene boundary (Marine Isotope Stages 20–18)Results of principal component analysis (PCA) compared to microfossil relative abundances and geochemical proxies. a Scores for PC1, PC2, and PC3. b, c Standardized microfossil relative abundances for PC1, d for PC2, and e for PC3, but the y axis for C. leptoporus is reversed. Highlighted events are the same as Fig. 2Back to article page