Figure 186 shows a map of the probability of the presence of ice during the navigational 

 period in Chuckchee Sea, compiled from observations from 1930 to 1936, while in table 117 we have 

 the average monthly areas of open water for 1924 to 1938. A comparison of figure 186 and table 117 

 gives a clear idea of the change in ice abundance and an indication of the influence of Pacific Ocean 

 water on the ice conditions of this sea. 



Figure 186. Probability of the presence of ice in the Chuckchee 

 Sea during the navigational period. 



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