176 



DISCOVERY REPORTS 



the pack-ice to - I-86'' C. at St. 993 and then increases gradually towards the north. 

 Towards the northern limit of the Antarctic surface layer the increase in temperature 

 is more rapid, until in 62'' 37' S the convergence of Antarctic with sub-Antarctic 

 water is reached. 



LATITUDE 

 STATION 590 



3373% 



66°5 



5B9 588 



67°S 

 567 585 585 584 



332l%o 33l7%o 



250 m 



500m 



750 m 



Fig. 4. Section II, distribution of salinity. 



In Fig. 2 the Antarctic surface water is seen as a poorly saline surface layer with a 

 salinity less than 347oo- Its salinity does not change with depth in the first 100 m. 

 below the surface. The salinity is greatest at the edge of the pack-ice and decreases 

 slowly towards the north. Figs, i and 2 together show that the Antarctic surface layer 



