OTHER PHYSICAL PROPERTIES 



HEAT FLOW MEASUREMENTS THROUGH AN ICE SHEET. Since the 

 thermal gradients from the water through the ice sheet, the snow cover, and the 

 atmosphere were measured for the state of the ice, it was decided to measure the 

 conducted heat flow per unit time per unit area through a sea-ice sheet with a 

 snow cover. The measurements were made at Site 2 and the data are presented 

 in figure 15. 



27 



MARCH 





28 MARCH 







29 MARCH 







30 MARCH 









31 MARCH 







APRIL 





2 APRIL 1 

















































rs 





























































i 































































/ 































































/ 















































































^ 































^ 



























































/ 



/' 





N 























\, 



































/ 









\ 





















\ 



s 





















^ 



^ 









J 













I 



















































/ 













> 



s. 







y 











































/ 















\ 



>V, 





/ 









































, 













































V 

















V 



/ 













































\ 

















\. 



■^ 















































s 





J 



















































































































13 



18 

 30 



00 



0* 

 00 



00 

 09 



14 

 00 



00 

 19 



00( 



oo 



X) 



05 



10 



00 



oo 



15 



20( 



00 



DO 



ooc 



04 



10 



OO 



11 



16 



OO 



00 

 21 



00 



00 



00 



07 



12 



00 



00 

 17 



0( 



30 



300 



08 



X) 

 13 



18 



30 



30 1 0400 1 

 0000 0900 



Figure 15. Conducted heat flow through snow-coVered ice sheet, site No. 2. 



RESISTIVITY MEASUREMENTS IN SEA ICE. Resistivity measurements 

 were made in the ice sheet at Site 2. Brass rods were driven into the ice sheet to 

 serve as electrodes. A switching device, which was designed to reverse the polarity 

 of the electrodes at each successive reading, was used to reduce the polarizing 

 effect on the electrodes. A 6-volt and a 12-volt lead storage battery were used as 

 the power supply for the system. 



18 



