ary are entirely ice-bound. Barents Sea is mainly ice-free except 

 in the eastern section along the coasts of Novaya Zemlya. 



In the northern end of BafRn Bay an area of open water seems 

 to persist throughout most of the winter. This "north water" 

 shifts in location and extent, but usually lies between Devon Island 

 and Thule, Greenland. 



Hudson Bay appears to freeze over except for wide leads. The 

 ice begins to move out or rot in place in mid-June. By July, the 

 bay and strait are fairly well open, as is the west coast of Green- 

 land as far north as Etah. The west coast of Novaya Zemlya is 

 almost ice-free by July and the ice has moved out of the southern 

 Kara Sea. Throughout August and September the northern 

 coasts of Siberia and the Canadian mainland, and the northwestern 

 coast of Alaska are ice-free. Ice persists between the far northern 

 islands of the Canadian archipelago and remains close inshore 

 along the coast of Alaska east of Point Barrow. Heavy pack-ice 

 remains through the summer along the northern coast of Green- 

 land and Ellesmere Island, and areas of unnavigable pack-ice are 



Figure 2-1 1 . — iceberg 300 feet high. 



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