Pacific Ocean Circulation — Hidaka 
207 
WEST <- > EAST 
-30 Cm /s - 20 Cm /s - IO Cm /s 0 + IO Cm /s 4 20 Cm /s 430 Cm /s 
ARCTIC CURRENT 
WEST WIND DRIFT 
NORTH EQUATORIAL 
CURRENT 
EQUATORIAL COUNTER 
CURRENT 
SOUTH EQUATORIAL 
CURRENT 
WEST WIND DRIFT 
OR 
ANTARCTIC 
CIRCUMPOLAR CURRENT 
ANTARCTIC 
CURRENT 
Fig. 5. Zonal distribution of E-W components of ocean currents at several depths expressed in cm/sec, when 
D z = 75 meters. (To obtain the velocity for other values of D z , multiply these velocities by 75 /D z , where D z is 
expressed in meters.) 
9, and 10, respectively, at 2 D z . The Equatorial Counter Current remains nearly unaltered 
in its speed in all depths compared above. 
Vertical Variation of the Currents 
The most important objective of the present research is to get a certain idea about the 
vertical structure of the wind-driven circulation in the Pacific Ocean. This will be, of 
course, impossible to obtain from former theories which have been mostly propounded 
with respect to the mass transport. 
As the problem is three-dimensional, the numerical computation is rather tedious. For 
this reason the author has not yet been able to finish the computation below the level 
