CHAPTER VI 



OCEANIC CIRCULATION 



In preceding chapters it has been pointed 

 out that the density of sea-water varies with 

 both the saHnity and the temperature. In 

 all questions concerning oceanic circulation 

 the density of the water as dependent on 

 salinity and temperature must be taken into 

 careful consideration. 



Theoretically we would expect the densest 

 water to be found at the bottom of the 

 ocean, and this is what actually occurs, as is 

 shown in the following table giving the mean 

 density for the whole ocean at different 

 depths : — 



This increase of the mean density with 

 depth is almost wholly occasioned by the 

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