374 



Tides in the Mediterranean and Adjacent Seas 



tides can be considered essentially as co-oscillating tides of a channel where 

 the incoming tidal energy is reflected partly at the inner, not completely 

 closed end; a part is lost directly in the channel. Gustafson and Otterstedt 

 (1930), and Jacobsen (1913) have analysed the current measurements for sev- 

 eral depths for the Kattegat and the Danish waters, respectively. 



Witting (1911) has tried a synthesis of the tides of the Baltic, on the basis 

 of the harmonic constants of a great number of localities which are summar- 

 ized in Table 43 (for Danish localities see Crone, 1906). It shows that the 



The values in brackets refer to P x , instead of O x . 



tides of the Baltic are very small. The sum of the amplitudes of the principal 

 constituents M 2 J r S 2 J rK 1 + ) is about 100 cm in the North Sea and de- 

 creases in the Skagerrak and Kattegat to below 20 cm, in the Belts to about 10, 

 in the Baltic to between 5 and 2 in the Gulf of Bothnia mostly below 2 cm. 

 In the Gulf of Finland there seems to be a gradual increase to nearly 10 cm. 

 The table shows also that, whereas in the Skagerrak and the Kattegat the 



