564 



Basic Principles of the General Oceanic Circulation 



i;0° 100° 90° 80° 70° 60° 50' 



50° 40° 30° 20° 10° 0° 10° 20° 30* 40° 3U- 



\W 120° 



Kk)° 90° 80° 70° 60 50° 40° 30° 20° 10° 0° 10° 20° 30° 40^ 



60° E 



Fig 258 Singular lines in the current field of the sea surface in the Atlantic Ocean. 

 (A) 'in the system of the tropospheric circulation: (1) the divergence region m the area of 

 the Cap Verde Islands (7° to 15^ N.); (2) the equatorial divergence region; (3) the con- 

 vergence region in the Equatorial Counter Current. In the region of the tropica thermoclme 

 these singular lines correspond to inverse ones. (B) the divergence region of the Benguela 



Current (C) , subtropical convergence; , polar and equatorial limits of the 



subtropical convergence regions. (D) , the oceanic polar front (Arctic and Ant- 



arctic convergence). 



