424 



Tides in the Mediterranean and Adjacent Seas 



of the harmonic constants can be found in Ogura (1933), who made a thorough 

 research of the tides and the tidal currents of this boundary sea. Table 59 

 gives a summary for a series of selected localities. The distribution of the 

 stations on the coasts is so good that it is possible to draw for the entire 

 boundary sea co-tidal and co-range lines for the semi-diurnal and diurnal tides. 

 Furthermore, a great number of tidal stations have been made by the Japa- 

 nese Navy in the Po Hai (Gulf of Chili) and in Hwang Hai far from the 

 coast, for which the tidal constants could be determined by wire soundings, 



FlG. 181. Co-tidal lines of the K x tide and co-range lines 2(# 1 -|-0 1 ) in cm. 



and recently also by means of high-sea gauges. The observations of the ver- 

 tical tide in the open ocean are complemented by a large number of current 

 measurements as given by Ogura (1933, pp. 47, 89, 91, 133, 137, 179 and 1934, 

 pp. 431, 471). On the basis of the complete available observations and using 

 the method of Proudman and Doodson (see p. 361), Ogura (1936, pp. 147-81) 

 has drawn charts of the M 2 and K x tide which seem to be very reliable. Es- 

 pecially for the northern section of the Hwang Hai, for the Po Hai and for 

 the Gulf of Liaotung there is a sufficient number of observations and tidal 



