station 9 this water was found at 600 meters depth. Some warm (4 2,0° C.) 

 water was obsezrved at the surface at station 9, At HJeception Island 

 (station 8) all temperatures observed were above 0° C, The tomperature 

 of the surface water at the Deception Island station wa3 4 1.90° C«, a 

 water tenperature of 4 1.0° C» was observed at about liO meters, and very 

 little change in water tenperature was observed from that depth to the 

 bottom where the observed temperature was f 0,89° C at a depth of ^7$ 

 meters. Surface water temperatures in the Bransfield Strait were above 

 0° C, along the observed section to a depth of $0 meters at the time 

 the stations were occupied (7 February 1955). 



2, Salinity 



Surface and upper water salinities were higher at the eastern end 

 of Bransfield Strait and decreased noticably to the westward, A small 

 tongue of high salinity water (3U.77 to 3U.99 °/oo) was observed be- 

 tween 15 and 3$ meters depth at the D'Urville Island station. This 

 probably represented Weddell Sea water flowing in from the east and 

 south. No trace of water of high salinity (3^,60 °/oo or higher) was 

 observed in the bottom waters of the D'Urville Island station, but 

 salinity values greater than 3U.60 °/oo were observed below 3^0 meters 

 at Deception Island, Steep vertical salinity gradients were present 

 at stations 8 and 9, the sharply defined gradients extending to depths 

 of 300 and 100 meters, respectively, 



3. Density 



Density showed much the same pattern as salinity, with a tongue 

 of high density water (27,93 to 28,11) pushing in from the east at the 

 D'Urville Island station. Also, marked vertical density gradients were 

 present to depths of 300 and 100 meters at stations 8 and 9, respectively. 

 Density values ranged from 27,10 at the surface at Deception Island to 

 28,11 at 15 meters at D'Urville Island, 



U. Sound Velocity 



A sound channel was present through Bransfield Strait, Depth of 

 the axis varied from $0 meters at station 8 to 100 and 1^0 meters at 

 stations 9 and 10, respectively, Soimd velocity along the axis de- 

 creased from U,75U ft,/sec. at station 9 to Ii,737 ft,/sec, at station 

 10, Both the depth of the axis and the velocities found along the 

 axis indicate the transition from the w;armer inflow through Drake 

 Passage in the northwest to the colder Weddell Sea water in the south- 

 east, A shallow layer sound channel was present in the upper 20 meters 

 at stations 9 and 10 but is not shown on the sound velocity profile. 



li 



