The Bering Sea from the Pribilof Islands to Bering Strait . 

 Nine hydrographic stations were occupied along a line running 

 from a point just south of the Pribilof Islands to the eastern 

 side of St. Lawrence Island and then north to Bering Strait; 

 three more stations were occupied on a line southeast from 

 Cape Prince of Wales toward Norton Sound. See figure 13 

 for the location of these stations. 



The temperatures taken at all hydrographic and bathy- 

 thermograph stations were scaled off at the surface, at 25 

 meters (82 feet), and at 40 meters (131 feet) for the construc- 

 tion of charts showing the horizontal temperature structure. 

 Two-degree F isotherm intervals were used. In areas of 

 weak horizontal gradients, additional isotherms could be in- 

 cluded. Where only a single line of stations was taken, extra- 

 polation of isotherms was made. 



Similar charts have been constructed to show the hori- 

 zontal distribution of salinity at the surface, at 25 meters, 

 and at 40 meters (figs. 20, 21, and 22). Here only the hydro- 

 graphic station data could be used. 



As shown by the horizontal distribution of temperature 

 and salinity at various depths (figs. 17 through 22), the major 

 change in these variables occurs in an east-west direction 



Figure 20. Horizontal distribu- 

 tion of salinity in parts per 

 thousand (°/ o) '" ,ne Bering 

 and Chukchi Seas, at the surface. 



