OCEAN CURRENTS RELATED TO THE DISTRIBUTION OF MASS 107 



Fig. 25 shows the results of two cruises off the coast of southern 

 GaUfornia in 1940. The upper chart shows the topography of the surface 

 relative to the 500-decibar surface according to observations between 



Fig. 25. Geopotential topography of the sea surface in dynamic meters referred 

 to the 500-decibar surface, according to observations off southern California on 

 April 4 to 14, 1940 (upper), and on April 22 to May 3, 1940 (lower). 



April 4 and 14, and the lower chart shows the corresponding topography 

 on April 22 to May 3. The stations upon which the charts are based are 

 shown as dots. The time interval between the cruises was about sixteen 

 days, and, although the main features were similar, the details were 



