670 



The Stratospheric Circulation 



Fig. 316. Dynamic topography of the physical sea surface relative to that of the 3000- 



decibar surface (according to Deacon). The figures are anomalies of the dynamic depths 



referred to a homogeneous ocean of 0°C and a density a^ of 2800. 



it sinks again rapidly to 800 m or more. The temperature sections show a tongue of 

 relatively warm water beneath the Antarctic water of the uppermost layers that forms 

 an intermediate layer between 400 and 800 m and must be interpreted as a returning 

 current flowing back towards south. Since this warm intermediate layer is found every- 

 where it seems to be a general phenomenon. Above it, in all sections (in summer), a 

 tongue with a lower temperature is found directed northwards at a depth of between 

 80 and 200 m. This stratification is no effect of a northward water transport but is 

 rather a remainder of the cooling which has been effective during the previous winter 

 (seePt. I, p. 137). 



