9 8 7 6 5 4 3.5 3 2.5 2 1.5 



ISOBAR SPACING (DEGREES LATITUDE) 



PLATE I. GEOSTROPHIC WIND SCALE FOR 3 mb. 

 SPACING OF ISOBARS AT SEA LEVEL 



32 



80 

 70 

 60 



50 

 45 



40 

 35 



30 



25 ^ 



z 

 o 



