Temperature Salinity 



Intermediate water (stations 6877-6881) 3.35 34.82s 



2,000 meters 3.23 34.88 8 



2.500 meters 2.95 34.89i 



3,000 meters. 2.41 34.87 8 



3,500 meters... 1.82 34.85 7 



In each case (except at 2,500 meters where the temperature was 

 the same) the temperature was slightly higher and the salinity 

 slightly lower than the corresponding values for 1957. The aver- 

 age increase in temperature was 0.06° and the average decrease 

 in salinity was 0.006°/ oo thus each contributing about equally to 

 the average decrease in a t of 0.01. 



An inspection of the isentropic surfaces intersecting the section 

 indicated that for this occupation the most nearly motionless level 

 was probably between 1,500 and 2,000 meters and closer to the 

 latter than the former. A reference surface of 2,000 decibars 

 was used, therefore, in the construction of figure 33 and in studying 

 the volume and heat transports across the section. The net volume 

 transport across the section, beach to beach, above this reference 

 surface was computed to be 1.00 X 10 6 m 3 /sec. in a northwesterly 

 direction. As the volume transport of West Greenland Current 

 exceeded that of the Labrador Current by 2.8, a value of 1.8 has 

 therefore been assigned to that part of the West Greenland Cur- 

 rent which recurves and recrosses the section to the southeast- 

 ward as indicated in figure 32. The net volume transport across 

 the section below the 2,000-decibar surface was also computed and 

 it also was directed northwesterly with a computed magnitude of 

 about 1 million cubic meters per second. (3.1 by one computation, 

 1.2 by another method and 0.9 by difference of the 11.46 flowing 

 northwesterly between station 6879 and Greenland and the 10.53 

 flowing southeasterly between station 6879 and Labrador.) 



In the past the net volume transport across the section above 

 the reference surface has been computed to be directed north- 

 westerly in some years and southeasterly in others. Following 

 is a summary for the post war years : 



60 



