424 



General Theory of Ocean Currents in a Homogeneous Sea 







100 

 200 

 300 



400 

 500 



-30 -24 -18 -12 -6 

 p, cm/sec 



+6 



Fig. 179. Vertical changes in the pressure gradients and of the velocity components in the 

 central part of the South Equatorial Current in the Atlantic Ocean. 



which, however, also disappears at 500 m depth since there the isobaric surfaces become 

 almost horizontal. 



Table 126 gives integral values for the equations (X1II.53) and the corresponding 

 resultant values of the wind stress; Fig. 180 presents the diagram offerees for this cen- 

 tral part of the South Equatorial Current. The average direction of the south-east trade 

 wind during the observational period was S. 40° to 45° E. and the mean wind force 



Fig. 180. Schematic diagram of the forces in the South Equatorial Current in the South 



Atlantic Ocean. 



about 12 m/sec. This wind direction is in excellent agreement with the direction of the 

 wind stress. The wind stress can be calculated from the meteorological data using 

 equation (XIII.48) or from the oceanographic data using equation (XIII. 37). In the first 

 case wind stress and wind speed lead to a constant value for A' of 2-5 x 10~^ which is 



