(A) Property-property plot of θ-S of all CTD data (black, conventional CTD; gray, trace-metal clean CTD), with five casts highlighted: red, Dotson Ice Shelf (DIS) outflow Stations 60 (top red line) and Station 61 (bottom red line); green, iceberg/mixing Station 57.26; blue, shelf break Station 4; and cyan, GIS Station 5. Water mass types include: Antarctic Surface Water (AASW), Winter Water (WW) and Circumpolar Deep Water (CDW). Blue dotted line indicates the surface freezing temperature; black dotted lines show the meltwater-CDW and the WW-CDW mixing lines. The red squares indicate the canonical WW and CDW values. Lines of constant density (σθ) are also shown. (See Figure 1 for locations of highlighted casts, matched by color.) (B) Details of θ and salinity observed in front of the DIS. The vertical profiles are from the DIS outflow Station 60, with θ shaded by degrees above freezing. In θ-S space, the upper red line is the DIS outflow Station 60, the gray lines are the other 3 DIS Stations 9, 10, and 11. The lower cyan line is from GIS Station 5, added for reference.