INTRODUCTION 



XI 



LOW PRESSURE AREA 



HIGH PRESSURE 

 Currents variable 



50" 



40* 



BO- 



ZO' 



North Equatorial Drift 



BELT OF 

 > — Counter Equatorial Currents 

 LOW PRESSURE 



■• — South Equatorial Drift— 



10* 



HIGH PRESSURE AREA 

 Currents variable 



■Easterly Drift - 



10* 



20° 



30^ 



40* 



LOV/ PRESSURE AREA 



Fig. 5. 



50" 



