TABLE 1. Stmmary of Ice Conditions Encountered 

 by the USCC3C NORTHWIND - 6 March through 16 April 1955 





March 

 6-12 



March 

 13-19 



March 

 20-26 



March 27 

 April 2 



April 

 3-9 



April 

 10-Ij6 



Number of observations 



28 



26 



28 



28 



28 



20 



Total concentration (tenths) 



Consolidated ice (10) 



18 



23 



11 



11 



5 







Close ice (8-10) 



7 



5 



17 



17 



21 



5 



Broken ice (5-^) 



3 















2 



5 



Scattered ice (1-5) 























7 



Open water (0-1) 























3 



Predominant size 



Giant floes field 



■■■16^- 



25 



15 



25 



11 







Small k Medium floes 



5 



■ i " 



5 







lii 



1 



Slush, brash & block 



3 



1 



5 











17 



All sizes 



U 



1 



3 



3 



3 



1 



Thickness of sea ice (feet) 



h -6 



8 



23 



12 



28 



\x 







1 - U 



20 



5 



'■■ 16 







23 







Less than 1 



















1 







Topography 



Rafted ice 



7 



5 



2 











1 



Ridged ice 



15 



20 



22 



28 



28 



1 



Flat ice 



5 



















8 



Slush or cake ice 



1 



















10 



Hummocks 







3 



- u 















Age 



Winter ice only 



2 



2 



















Yo\mg ice only 



1 







2 















Winter ice predominant 

 Young ice secondary 



23 



26 



26 



28 



28 



7 



Young ice predominant 

 Brash & slush secondary 



1 



















2 



Slush, brash & pancake 



1 



















11 



Orientation of cracks and leads 



NW-SE 



3 







1 







3 



18 



NE-,SW 







2 











1 



2 



N-S 



1 







16 



6 



5 







E-W 







h 



U 







1 







No distinct orientation 



2ii 



22 ■ 



7 



22 



18 







2U 



