Tides in the Mediterranean and Adjacent Seas 



437 



as "open". The tidal motion of the entire basin was computed in four steps, 

 viz.: (a) the independent tides with basins imagined to be completely closed; 

 (b) the co-oscillating tide with only one side open FG, at which there is 

 a uniform tidal current U; (c) the co-oscillating tide at the opening DE with 



Fig. 185. 



Schema of the division of the Gulf of Mexico for the theoretical computation 

 of the tides. Position of the tide stations around the Gulf. 



a tidal current V; and finally (d) the co-oscillating tide at the opening CD 

 with the tidal current W. The tides of the entire Gulf are regarded as the 

 superposition of these 4 partial tides, and the comparison with the obser- 

 vations gives the tidal currents U, V, W at the openings. 



Table 65. Comparison between theory and observations in Gulf of Mexico 



* Phase referred to the centre meridian of the Gulf, 89-9° west of Greenwich. 



