04 MARION AND GENEEAL GREENE EXPEDITIONS 



7D 70 60 50 40 30 



60 50 



FiGUEE 57. — Salinity at 200 meters July 19-September 11, 1928. 



A narrow strip of water colder than its surroundings is recorded 

 over the continental edge on the surface temperature map extending 

 from Hudson Strait to the Strait of Belle Isle. This, of course, is 

 the reflection of the axis of the coldest subsurface water of the 

 Labrador Current. The warmer area off Nachvak Fiord, enclosed by 

 6° and 7° isotherms, coincides (fig. 47) with the shelf locality of 

 weak currents. 



