Ticks in the Mediterranean and Adjacent Seas 



All 



appears to exist an amphidromy, and towards the Banda Sea the phase 

 remains almost constant at 290°. 



In the second and third canal, the distribution of the co-tidal lines look 

 as if the main influence comes from the Pacific Ocean, whereas the Banda 

 Sea would only co-oscillate with the Indian Ocean. In neither of the two 

 cases is there any indication of a nodal line which, as a matter of fact, could 

 not be expected in view of the value of v. 



The high values of the ratio indicating the character of the tides in the 

 entire Indonesian Archipelago indicate the part which the diurnal tides play 

 int here. Figure 179 gives a presentation of this ratio. Particularly apparent 



Fig. 179. Ratios indicating the character of the tides in the Indonesian Archipelago. 



are the nodal lines of the M 2 and S 2 tides, where this ratio exceeds everywhere 

 the high value of 3. The entire area of the central Java Sea belongs to it, 

 equally the area between Indo China and North-west Borneo. An area of 

 a relatively low value of this ratio extends east of 120°E., where it does not 

 reach 1. 



The ratio of the M 2 tide to the other semi-diurnal tides like S 2 and vV 2 is 

 abnormal and points to the fact that the tides of the entire Indonesian Ar- 

 chipelago are dependent upon the natural periods of the various basins. 

 Especially the age of the semi-diurnal spring tides is very irregular. Localities 

 situated close to each other show very great differences; thus, the Thousand 

 Islands have a lag of 4 3 days, the Edam Island (Bay of Batania) a priming 

 of —0-9 days; near Samarang it increases to —50 days. On the contrary, 

 Karimon Endjawa has again a lag of 4 days which eastwards increases to 



