30' 120'* 



FIGURE 8.— Oceanographic features of the Subarctic region of 

 the North Pacific Ocean. The Alaskan Stream flows strongly 

 westward; the Ridge Area is a boundary between westward 

 and eastward flow; the current in the Western Subarctic Area 

 flows eastward; and the Transition Area, which has a weak 

 eastward flow, is a mixture of Subarctic and Subtropic water. 



The ultimate goal of our oceanographers is to forecast 

 environmental conditions and their effect on the abundance 

 and migration of salmon. The direction and size of major 

 ocean currents appear to depend on the wind or barometric 

 pressure. This tjq^e of water movement is called wind- 

 stress transport. Transjjorts calculated from meteorological 

 data can indicate monthly, seasonal, and annual variations 

 in circulation during periods of no direct observation. The 

 oceanographers compare actual observations with circula- 

 tions calculated from pressure distributions. 



FIGURE 9.— One of the Laboratory's telemetry buoys being 

 lowered in midocean. It measures temperature and salinity 

 and can store the information. 



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