Fig. 1.Last sampled depth histograms (red) for the XBT probe types and CTD casts analyzed in this study. Histograms for the respective GEBCO bottom depths areshown
in blue. Ngives the total number of profiles: (a) T10; (b) T4; (c) T6; (d) unknown type shallow depth; (e) T7; (f) DB; (g) unknown type deep depth and (h) CTD.