112 



MARION AND GENERAL GREENE EXPEDITIONS 



tions in 1933 did not extend out to the margin of the Atlantic Current 

 but if section P3 (1934, fig. 74) had been drawn so as to have included 

 station 1739, it would also have shown the margin of the Atlantic 

 Current. The margin was computed to have contained 7.8 million 

 cubic meters per second. This set, as earlier described on page 82, 

 is a mixture of subtropical Atlantic water and returning water of 

 the Labrador Current. 



In some of the velocity profiles, especially those for 1933, a third 

 band of current has been revealed somewhat offshore of the conti- 

 nental slope. It is believed that this represents a local, temporary 

 condition only, in which a whorl in the Labrador Current intersected 



FiGUBB 76. — Temperature-salinity correlation of the Labrador Current in the Amerioai 



sector the summer of 1931. 



the plane of the section. Such departures often reflecting an excess 

 or deficit in the computed volume of the north-south components 

 should, of course, be discounted, each case being judged on its 

 particular merits at the time and place. 



A table, recording in more detail the volume of the bands of 

 Labrador Current and intersected eddies, is appended at the end 

 of this chapter. 



The Labrador Current (see table p. 127) averaged greatest volume 

 in 1933 and smallest in 1931, varying from 5.4 million cubic meters 

 per second to 3.4 million cubic meters per second. The excess of 

 current in 1933, as shown on figure 75, was mostly confined to the 



