Tides and Tidal Currents in the Proximity of Land 



333 



speaking, comparisons have shown that the principal phenomena are cor- 

 rectly represented by the theory. Sverdrup and Fjeldstad tested mainly the 

 current observations obtained during the "Maud" expedition, from 1918 



S--0%j2h--40 



Fig. 136. Tide wave in a rotating, (s = 0-6) unlimited canal (Sverdrup). In upper figure 

 of B, current diagram at the surface; lower figure current diagram in 3/4 depth; otherwise 



the same as in Fig. 130. 



to 1925, on the North Siberian shelf, which were made mostly in the presence 

 of a more or less thick layer of pack-ice. Figure 137 reproduces graphically 

 the observations of St. 8 (18 July, 1924, 76-5° N., 141-5° E., depth 22 m). 



■40-20 20 40 cnr Vsec 



NE Om 



NW 



MW 



Fig. 137. Tide currents on the Siberian shelf. Station 8 (18 July, 1924) (Sverdrup). 



The vertical section A has been placed in the direction of propagation of 

 the wave (NW. to SE.), the component of the current in the direction of 

 progress is represented for every Greenwich lunar hour. B gives the vector 

 diagram for the currents for and 12 m depth. There are three circumstances 



