3. Anchor Station Data . Three anchor stations varying from 

 25 to 44 hours duration were occupied in the East Siberian Sea in 

 1964. During these stations, periodic Nansen casts and current observations 

 were made when ice conditions permitted. Anchor station locations 

 are shown in figure 26. 



Figure 26. Anchor stations occupied by BURTON ISLAND . Stati. 

 Bering Strait and lies .outside the area covered by this report. 



3 is not shown because it is near 



a. Nansen Casts . A total of 20 Nansen casts was taken on 

 the 3 anchor stations. The first two stations of six Nansen casts 

 each were occupied in mid- July, and the third of eight Nansen casts 

 was occupied in mid-September. Time between casts varied from 4 

 to 9 hours, and bottles were spaced every two meters throughout the 

 shallow water column. 



Casts 1 through 6 at anchor station 1 showed a surface temperature 

 variation of 0.86°C and a surface salinity variation of 6.25 %o over 

 a 25-hour period. Similar variations occurred at all depths sampled, 

 but they generally decreased in magnitude with depth. 



Casts 7 through 12 at anchor station 2 showed a surface temperature 

 variation of 1.30"C and a surface salinity variation of 1.53%o for 

 a similar 25-hour period (Fig. 27). Temperature variation generally 

 decreased with depth as in Nansen casts 1 through 6, but salinity 

 variation increased slightly below 10 meters. 



Casts 35 through 42 at anchor station 4 showed a surface 

 temperature variation of 0.67''C and a surface salinity variation 

 of 5.45 %o over a period of 42 hours (Fig. 28). Both temperature 

 and salinity variations generally decreased below 10 meters. Above 

 10 meters, there was a marked salinity increase on Nansen casts 40 

 and 41. The sharpest increase occurred at 6 meters where salinity 

 increased 7.31 %o from cast 41 to 42. A similar, though lesser, 

 increase occurred at all depths sampled dovm to 8 meters. On cast 

 42, salinities from the surface to 8 meters varied by only 0.06 %„ 



36 



