CH. Il] THE OCEANOGRAPHY OF THE NORTH-WESTERN OCEAN 47 



from more southerly latitudes, must vary with the season. This 

 is actually the case. There is indeed a uniform flow of Atlantic 

 water over the Wyville-Thomson Ridge — uniform in the sense 

 that it is continuous — but if we study the appearance of the 



Arctic 

 water 



Fig. 17. The North-Western Ocean shewing the European stream and its 

 offshoots. From Pettersson, Rapp. Proc.-Verb. Vol. iii. 1905. 



stream in its remote ramifications, as in the North Sea, the 

 Skagerak, or in the Barentz Sea we see that yearly pulsations, 

 analogous with those which occur in the Gulf Stream eddy, do 

 really take place. The most curious proof of the correspondence 



