38 



DISCOVERY REPORTS 



temperature maxima at stations other than St. 550 are very faint. Probably the greatest 

 part of the warm deep water inside the strait at the south-west end flows eastwards past 

 St. 550, south of Deception Island, through a gap in the supposed ridge between 

 Deception and Trinity Islands. Below the level of the intermediate temperature 

 maxima at Sts. 550 and 553 the water contains increasing proportions of Antarctic 

 bottom water with depth. 



STATION 



SNOW I 



552 



553 



500: 



1000m- 



500 



STATION 



SNOW 



Fig. 49. Vertical section of temperature: Snow Island to Trinity Island, December 1930. 



549 550 551 552 



500 



IOOQi 



1500- 



Fig. 50. Vertical section of density (ct ( ): Snow Island to Trinity Island, December 1930. 



WATER MOVEMENTS 

 The treatment by dynamical methods of the data obtained from the various surveys 

 of the Bransfield area has been a difficult task. As may be seen from the bathymetric 

 chart, very great differences of depth occur at adjacent stations and it is impossible from 

 the present data to obtain sufficient figures from which satisfactory topographical charts 

 may be drawn of the sea surface in relation (say) to the 2000 or 1500 decibar surfaces. 

 Consequently some arbitrary treatment is necessary on account of the great differences 



