48 



MARION AND GENERAL GREENE EXPEDITIONS 



about 100 to 150 meters below the sea surface. If the Irmmger- 

 Atlantic water be traced upstream, however, the upper side as 

 marked by the 35.00%o isohaline, often intersects the sea surface (see 

 Bohnecke, 1931) east and north of Cape Farewell in the vicinity 

 of the thirty-seventh meridian. This again strongly suggests the 

 sinking of Irminger- Atlantic water. (See p. 175.) 



That two homogeneous bodies of water free from outside influences 

 mix in ratio to their physical properties of temperature and salinity 

 is well known. This correlation when plotted graphically forms a 

 straight line between the points typical of the components of the 



33.00 



3400 



SALl N I TY 



35.00 



Figure 23. — Temperature-salinity correlation curves of the West Greenland Current, Cape 

 Farewell to Hosteinsborg, the summer of 1928. 



mixture. In all of our correlation graphs (figs. 23, 49, 65, 66, 76, and 

 100) the temperature-salinity data have been plotted by sections, 

 the resulting curves representing, therefore, each the temperature- 

 salinity correlation of the current at that particular cross section. 

 The continuity of the curves is directly proportional to the distance 

 between stations of the given section ; tlie greater the number the 

 stations the more accurate the temperature-salinity curve. The 

 West Greenland current, for example, is ilhistrated by a series of 

 curves on figure 23, the letter on each curve referring to the corre- 

 sponding section as shown on figure 7. The lower left portion of 

 the curves represents east Greenland Arctic water, and the upper 



