iOOO 



3500 



3000 



2500 



2000 



1500 



1000 



500 







'II \ IV \ V \ VI \ ^11 I 



MONTHS 



Figure 70. Air temperature ( ). number of freezing degree-days (- -) 



and ice thickness (•— ) near Cape Schmidt in the Chuckchee 

 Sea during the winter of 1936-1937. 



I obtained the following formula by processing the observations of ice formation on Uyedine- 

 niye Island (Ostrov Uyedineniye) during 1935-1936 and on Cape Schmidt (Mys Schmidt) during 1936- 

 1937 (figure 70) and by using the available observations made by certain other polar stations as a 

 control: 



+ 50 J = 8 5, 



(6) 



Formula (6) pertains to average conditions. As we shall see further, the thickness of ice 

 accretion depends not only on the number of freezing degree-days, but also on the thickness and 

 density of the snow, and also on the time when the given snow cover formed, on the distribution of 

 temperature and salinity beneath the ice, on the presence or absence of sea currents, and on many 

 other factors. 



OMi 



0.00^ 



0.003 



2000 mo 6000 



FREEZING DEGREE-DAYS 



Figure 71. Ice thickness vs. number of freezing degree-days. 



207 



