54"W 53" 52" Sr 50" 49" 48" 47» 46" 45" 44*' 43"* 42''W 



52«N 



51" 



50" 



49« 



48" 



47" 



46« 



45» 



44* 



43' 



42« 



41" 



40« 



54"W 53" 52" 5I' 50» 49» 48» 47» 46" 45" 44"» 43" 42»W 



Figure 9. April monthly normal dynamic topography of the sea surface relative to the 1000 decibar surface. 



Contour interval 2 dynamic centimeters (after Soule, 1964). 



20 



