Fig. 2From: Millennial-scale oscillations in the Kuroshio–Oyashio boundary during MIS 19 based on the radiolarian record from the Chiba composite section, central JapanPlot showing the latitudinal distribution of Tr values in the northwestern Pacific based on the dataset from Matsuzaki and Itaki (2017). Similar plots for each species or species groups used for the Tr estimation are shown in Additional file 5: Fig. S3Back to article page