(a) SURFACE CIRCULATION IN THE NORTH PACIFIC OCEAN 



WINTER 



60' !20' 



Figure 2a. --Ocean circulation in winter. (Adapted from G. Shott. , Geographic des Indischen und 

 Stillen Ozeans, and U. S. Hydiographic Office, Pilot Charts.) Short-line segments 

 show pressure gradient network from figure 1. 



(b) NORMAL SEA LEVEL PRESSURE 



JANUARY 



t^o° ^^0^' "i'r 



CO" 90° &n» 



Figure 2b. --Normal sea level pressure distribution for January. (Adapted from Normal Weather Charts 

 for the Northern Hemisphere, Technical Paper No. 21, U. S. Department of Commerce, 

 Weather Bureau.) 



