Figure 4. Position of Leg 172 sites with respect to water masses in the
western subtropical North Atlantic. Water depths are indicated every 500
m along the temperature/salinity (T/S) plot. Sites were chosen so at least
one lies within each modern water mass and one lies at the boundary
between water masses. This depth distribution of sites is required to
monitor the most likely changes in water masses and their boundaries
through the late Neogene. U = upper; L = lower. KNORR 140/2 Hydro Sta. 1
refers to the site survey cruise and station number that were used to
collect the data.
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