Hydrography of the Stream 



49 



necessarily coincident with the left-hand or inner edge of the Gulf 

 Stream. 



The ' warm core ' is defined here as that part of the Gulf Stream 

 containing water warmer than the water at the same depth to the 

 right, facing down stream, of the current. This 'warm core' is 



4 3 2 I 30 9 8 7 



Fig. 24. Salinity section across the Gulf Stream, Chesapeake Bay to 

 Bermuda, April 17-23, 1932, according to Iselin (1936, fig. 6). 



generally 300 to 400 meters deep with the maximum temperature 

 anomaUes at a depth of about 100 meters. 



The word 'front' is considered synonymous with the pro- 

 nounced pressure gradient and therefore Avith the Gulf Stream 

 itself. 



The term 'cold wall' dates back to 1845 and is still frequently 

 used to denote the 'inner edge of the Stream' or, according to 

 Church (1937), 'the temperature gradient between the slope 



