which was taken near the ice pack. The surface salinity at 

 this station was 32.90, as compared with an average surface 

 salinity of 33.80 for the other five stations. The salinity 

 distribution in the summer thus aids in establishing stability 

 in the upper layers. This stability restricts the heating in the 

 ice-free areas to the upper 45 meters (150 feet) and leaves 

 the winter-cooled layer just below this depth at temperatures 

 near freezing. At all stations the salinity at 300 feet lies 

 between 34.0 and 34.5 o/oo which corresponds to the types 

 of water found in the cooled layer in winter. 



Salinity (»/») 

 33.40 34.00 



FIGURE 22. Vertical salinity structure at hydrographic 

 stations. 



43 



