TEMPERATURE OF THE SURFACE WATERS OF THE ATLANTIC OCEAN 



lOCr 90" 80" 7U 60^ 30' 40" 30* 20" 10° 0' W 20" 30" 



A = Polar front on the basis of temperature distribution at the surface. 



— — — — =Polar front according to G. Wiist. 



= Polar front according to Deacon. 



..— . —'^\ = Fragments of the front of the West Wind Drift (secondary polar front) on the basis of temperature distribution. 



-f P .^. q' = Subtropical boundary on the basis of temperature distribution. 



TT TT T B' = Doubt ful position of subtropical boundary. 



— = Subtropical convergence according to Deacon. 

 „»=Do<.=occooooooo = Subtropical convergence (also convergence area) on the basis of current displacements. 

 = = = = — = Doubtful position of subtropical convergence. 



X = A point plotted from temperature gradient profile. 

 (Xl = A point which could not be established for every month. 

 Figure 4. — Average position of the fronts and boundaries in the South Atlantic Ocean. 



