36 



MARIOX EXPEDITION TO DAVIS STRAIT AND BAFFIN BAY 



40 2o 



The Varying Bounds of Pack Ice 



1 FiGUBE 19. — The annual maximuni, minimum, anii mean limits to which pack ice in sub- 

 stantial volume has been reeonled over a period of years. The data for the pack lee in 

 the east Greenland current has been taken from a 15-year record of the Danish Mete- 

 orological Institute. The data for the ice in the Labrador current comes from the 

 international ice ijatrol and other sources. 



