242 



[chap. 10 



2.10 

 2.00 

 1.90 

 1.80 

 1.70 

 1.60 

 1.50 

 1.40 

 1.30 



i x 



•VM 



III* .» 



•vn xi 

 II* *.ix 



y v • y v ix y 



-0.6 

 -0.4 



-0.2 



-0.1 



- 0.50 

 d0.45 



180° 170° 160° 150° 



LONGITUDE 



100° 90°W 



Fig. 5. The slope of the sea surface along the equator in the Pacific relative to the 1000-db 

 surface. The 500-db relative to the 1000-db surface is also plotted for comparison. 

 All observations made within one degree of the equator. Roman numerals refer to the 

 month of the observation. At the top of the figure is the mean east-west wind stress. 

 Minus values refer to an easterly wind. Wind stress values from Hidaka (1958). 



60° 



LONG I 



0.55 g 



o 



0.50 § 



0.45 S 



0.40 ° 



Fig. 6. The slope of the sea surface 

 along the equator in the Indian 

 Ocean relative to the 1000-db 

 surface. The 500-db surface 

 relative to the 1000-db surface 

 is also plotted for comparison. 

 All observations made within 

 80 miles of the equator. Roman 

 numerals refer to the month of 

 the observation. At the top of 

 the figure is the mean east-west 

 wind stress. Minus values refer 

 to an easterly wind. Wind stress 

 values from Hidaka (1958). 



