GENERAL CIRCULATION OF THE PACIFIC OCEAN 525 



Thus we have the solution (21) of our problem in the form: 



^ 1 {2s—l)^z 



H>i.y.z)= 2^*K^.>') -^ cos 2^ , (25) 



« = 1 

 and we may write down (25) in the form: 



2a.p \dx* "^ a>-* J " 8 v's^ "^ 3^= y 



cos <^ 3^1 I /"Stx 3Ty *\ 



~ R 'djT "^ ^a> \'3y Ix' J 



D, 



(28) 



which is derived from (19) by putting ^2. — 1) = rj and h = I. 



The right hand sides of the equation (24) will be, when the depth h 

 increases indefinitely, 



1 /*» / ttZ \ 



It may be mentioned that ?/ is a parameter increasing from to oo. 



4. Application to the Pacific Ocean 



In 1950, Munk used the rectangular coordinates in discussing the 

 wind-driven oceanic circulation in a rectangular ocean. Though he 

 did not take the sphericity of the earth into consideration, he could 

 explain the general pattern of the actual circulation of the Pacific quite 

 well. Further, his result shows little difference from the one above 

 (Hidaka, 1951), in which the curvature of the surface of the earth is 

 taken into account and spherical coordinates are used. 



These results show that the Pacific Ocean can be treated approxi- 

 mately as a rectangular ocean, provided we consider the Coriolis para- 



