i6 



DISCOVERY REPORTS 



200 m. at St. 198 which has already been noticed. In general the salinity of the deeper 

 water in the Bransfield Strait is lower than at corresponding depths in the seas outside 

 the strait. This is due to the effect of the bounding ridges surrounding the Bransfield 

 Strait in restricting the flow of warm deep water into the strait and to the very consider- 

 able vertical mixing which occurs throughout the strait in winter. At depths below the 



STATION 202 203 



LIVINGSTON I. 33-90& 



500n 



lODOrv 



TRINITY PENIN^ 



Fig. 11. Vertical section of salinity: Livingston Island to Trinity Peninsula, April 1927. 



Fig. 12. Vertical section of temperature : Livingston Island to Trinity Peninsula, April 1927. 



STATION 202 203 204 205 



LIVINGSTON I. 2720 2730 



206 



TRINITY PENIN* 



500s 



1 000s 



Fig. 13. Vertical section of density (<r,): Livingston Island to Trinity Peninsula, April 1927. 



traces of warm deep water inside the strait the water is formed from the dense water 

 of Weddell Sea origin which mixes with the surface water in the remainder of the 

 strait and in winter is rendered more saline by the removal of water in the form of ice. 

 The more saline water then sinks to form the bottom water. 



