2. Physical Properties 
a. Temperature 
These cross-sections show a subsurface minimum (Winter Water) with 
temperatures colder than -1.50°C in the upper 100 meters. Below this minimum 
layer, temperature increased with depth to the bottom, where maximum temperatures 
were observed. A subsurface layer of slightly warmer water existed above 50 meters 
at a number of stations north of Eights Coast. 
b. Salinity 
The most rapid increase in salinity occurred in the upper 75 meters in 
the area of transition from the thin layer of Surface Water to Winter Water. Salinity 
increased to a value of 34.00%,. The northwest-southeast cross section (Fig. 21) 
shows surface salinities progressively decreasing southwardly from 33.90%, at station 
73 to 32.20%, at station 68. Horizontal distribution of salinities otherwise were 
generally uniform. 
c. Sigma-t 
Isopycnals closely paralleled the isohalines in all cross-sections. At 
stations 71, 72, and 73 (Fig. 21), surface sigma-t values were greater than 27.00 
and were less than 27.00 at station 68 and all stations in Figures 19, 20, and 22. 
Sigma-t values as high as 27.81 were observed near the bottom on the deepest 
stations. 
d. Dissolved Oxygen 
Dissolved oxygen content decreased with depth throughout the area. 
The greatest surface oxygen variation occurred at stations 68 through 73 (Fig. 21), 
where a value of 9.02 ml/I was observed at station 68 and 6.78 ml/I at station 73. 
Oxygen values decreased to less than 4.5 ml/I near the bottom at the deepest 
stations. 
E. Comparative Station Profiles 
Temperature-salinity plots for stations in the areas surveyed during DEEP FREEZE 
61 were prepared and are shown in Figure 23. From these plots, a representative 
station was selected from each area for illustration and comparison. Profiles of the 
observed physical and chemical properties, Figure 24, were prepared for each of the 
representative stations. 
36 
