S8 



DISCOVERY REPORTS 



50° 



60 



A.\.\ .iil.H.l.iil.C TilZ 





30° 



I^ID^I 



i.j.j.i.i.i. Tz^^ic:!^ 



-WD NORTHERN BOUNDARY OF WEDDELL DRIFT 

 -EWD NORTHERN BOUNDARY OF EAST WIND DRIFT 

 PRINCIPAL SURFACE MOVEMENTS OF THE 



COLDER ANTARCTIC WATER 

 CIRCUMPOLAR WEST WIND DRIFT 

 -^ ICE EDGE^ — MEAN POSITION IN MARCH 



\.^.\A,\.\,\.).i.iA.j:znz. 



SOUTH AFRICA 



! ' '.!■>.>-> 



w^ 



120^ 



150° 



W 180"E 



150° 



Fig. 4. Map of Antarctica and the circumpolar sea showing physical and geographical features, hydrological boundaries and 

 surface water movements, referred to in the text. It should be noted that the Antarctic convergence can be located more definitely 

 than the boundaries of the Weddell and East Wind drifts, but all these boundaries are subject to variation or uncertainty. 



