Fig. 4

Pacific Ocean density (\({\sigma }_{0}\)) along 170°W (P15 between 70°S-0°S, see Fig. 5) observed in May and June 2016 from the GO-SHIP Easy Ocean gridded data product (white contours) overlaid on density (\({\sigma }_{0}\)) from the CAFE60¹⁵ reanalysis product averaged over the same period. Colormap is from ref. ²³.