116 



MARION AND GENERAL GREENE EXPEDITIONS 



7° C, and salinities of 34.90%o were found in this locality, where 

 on the current maps and the velocity profiles, north-flowing counter- 

 current has previously been described. This region, therefore, is 

 unmistakably associated with currents coming from farther south 

 in the Atlantic. 



The vertical distribution of temperature and salinity for the 

 summers of 1931, 1933, and 1934 is depicted on figures 87 to 92. 

 The same outstanding features noted in the 1928 sections are seen 

 here, viz, the shelf of frigid water and the upward inclination of 

 the isohalines coast to continental edge. 



The 1931 profiles in both the northern and southern regions of 

 the American sector, recording saltier water than the profiles in 



60 50 60 50 



Figure 81. — Temperature and salinity at 600 meters July 4-August S, 1931. 



between, indicate first the influence of the West Greenland Current 

 in the north and later the Atlantic Current in the south. The saltier 

 water in 1931 than in any of the other summers, as revealed by a 

 comparison of all of the salinity profiles, corroborates the surface 

 current map (fig. 123, p. 167), viz, the West Greenland Current set 

 more directly across the Labrador Sea the summer of 1931 than in 

 any of the other summers. 



If the corresponding temperature and velocity profiles for the 

 "N" sections be superimposed on each other and the average tempera- 

 ture and the rate of heat transfer for the Labrador Current be 

 computed in accordance with the methods explained (p. 24), these 

 values afford a means of comparison between the summers investi- 

 ofated. 



