ZOOGEOGRAPHY 



211 



LATITUDE 



JANUARY 1939 

 STATION NO. 2547 2545 



I 



soo 



4000m ^ 



4500„ 



Text-fig. 18. Distribution of salinity (% ) between 70 S. and 40° S. in the region of the 



Greenwich Meridian, January 1939. 



' a small southward movement ', which ' causes the south-west coast of the island to be bathed with 

 water from the Bellingshausen sea current whilst the Weddell Current is held off shore' (Deacon, 

 1937, p. 32). North-east of South Georgia, movement is more to the north and the Weddell 

 Current normally has an important influence off this coast of the island. East of the Greenwich 

 Meridian in the higher latitudes, the East Wind Drift flows westward along the Antarctic continent 

 into the Weddell Sea. 



Antarctic Surface Water extends northwards until it meets and mixes with the warmer, lighter 

 Sub-Antarctic Surface layer, and sinks below it along a well-marked line, the antarctic con- 

 vergence. The position of the convergence can normally be recognized by a sharp change in surface 

 temperature. In summer, when the convergence is crossed from south to north, an increase from 3 



7-2 



