PRESSURE GRADIENT 1 



PRESSURE GRADIENT 2 



SONDJFMAMJJA 



15 15 15 15 15 15 15 15 15 15 15 15 



SONDJ FMAMJJA 

 15 15 15 15 15 15 15 15 15 15 15 15 



PRESSURE GRADIENT 3 



PRESSURE GRADIENT 4 



15r 



10 



10 



15 



10 



'0 



15 L 



Figure 27.— PRESSURE GRADIENTS 1^1 

 41 



