OCEAN CURRENTS 



189 



of the Atlantic. Probably the icebergs seen by |;nnrs Ross in 

 1836 in 61 N. and 6 W. came from (his mrn-nt. At anv 

 rate, the current produces a tongue of cold \\atrr of 1<>\\ 

 salinity (under 34) north of the Faroes (Fig. 40)- 



Between this water and that of the Florida ( uncnt c 



10 



FIG. 40. SURFACE CURRENTS AND SALINITIES AT 150 FATHOMS IN THE 

 NORWEGIAN SEA. (HELLAND-H.ANSEN AND NANSEN.) 



35 salinity) there is a body of mixed water (between 35 and 34 

 salinity) with varying and often whirlpool circulation. 



The distribution of this water probably varies from year to 

 year, certainly the extent of the cold tongue varies ; the figure 

 shows the average conditions during 1900-1904. According 

 to the biologists, the chief species of Copepod characteristic of 

 the different masses of water is for the east part of the cold 

 tongue Colanus hyperboreus ; for the mixed water Cahitms 



