Tides in the Mediterranean and Adjacent Seas 



401 



but in the central section the ratio increases to more than 1-5, and in the 

 immediate vicinity of the nodal line of the semi-diurnal tides it exceeds 2, 

 so that the tides are almost of the diurnal type. This distribution is fully 

 explained by the behaviour of the Adria in regard to the semi-diurnal and 

 diurnal impulses from the Ionian Sea. 



20 

 Cross-sections 



40 



Fig. 169. Distribution of the amplitudes of the M 2 and K L tides of the longitudinal co-oscilla- 

 tion of the Adria with Ionian Sea. , observed; , theoretical distribution of co-osci- 

 llation with Ionian Sea, , considering the independent tide. 



For the purpose of explaining the tides, the Adria was first considered 

 as a canal open at one end, co-oscillating with the tidal motion of the Ionian 

 Sea, [Defant (1914, p. 270), Sterneck (1914) and Defant (1914, p. 556; 



26 



