vicinity of the Convergence, these low salinities shoaled to the surface. 

 Below this, the 3^.25 and 3^.50 %> isohalines parallel the S^.OO % to the 

 Convergence where they turn sharply downward to the north, indicating 

 the Antarctic Intermediate Water. The characteristic salinity minimum 

 at the core of Intermediate Water is not evident, possibly owing to the 

 sampling interval. 



Below the surface layer, the 3^*70 %» isohaline is indicative of 

 Antarctic Circumpolar Water. Below the Circumpolar Water, a salinity 

 maximum of greater than 3^»75 %> was noted in the transition zone at 

 about 1,300 meters, stations 22 through 2k. Salinity decreased only 

 0.05& from here to the greatest depth shown on the cross section. 



c. Density 



In the Antarctic Surface Water, isopycnals closely parallel 

 the salinity pattern, with densities increasing from less than 27.00 

 to approximately 27.50. North of the Convergence, these isopycnals dip 

 sharply. On the two stations north of the Convergence, a 26.75 isopycnal 

 lies Just below the surface, delineating Subantarctic Surface Water from 

 Antarctic Surface Water. The 27.75 isopycnal parallels the 3^.70 %, 

 isohaline where the warm, deep water rises to form the Circumpolar Water. 

 Densities greater than 27.85 were observed in the transition water on 

 the southernmost stations. 



25 



