106 



2. Computations of the volume of flow have been made and the 

 results presented to show the seasonal variation of the Labrador 

 Current during 1939 as compared with other variations found during 

 the previous 5 ice seasons. 



3. The boundary between Atlantic Current water and Labrador 

 Current water, as delineated by the horizontal projection of the zero 

 salinity anomaly surface at the intermediate salinity anomaly maxi- 

 mum, was investigated but found to be outside the limits of the 1939 

 surveys. 



4. Profiles of temperature and salinity anomaly near the Tail of 

 the Grand Banks have been used to clarify the genesis of the isolated 

 cold-water masses frequently found in that vicinity, and incidentally 

 to point out a partial cause of the intermediate salinity anomaly 

 maximum. 



5. A recapitulation of the various indicators of the shape and depth 

 of the motionless surface in the Grand Banks region has been given 

 and amplified by a further verification in the form of a deep-level 

 isen tropic analysis of data collected on the 1937 post-season cruise. 



6. Tables of the dift'erence between ag and at for various values of 

 temperature and density, and of ag corresponding to various values 

 of salinity have been given to facilitate the plotting of lines of equal 

 (Tt on temperature-salinity coordinates. 



7. An analysis of the first survey showed the existence of definite 

 temperature-salinity correlations for the mixed water and Labrador 

 Current water in the Grand Banks region, and the correlations have 

 been presented grapliically. 



8. A comparison between the thermal characteristics of the Labra- 

 dor Current off South Wolf Island, Labrador, found in 1939 and 1938, 

 has been presented to show the off-shore shift of this current resulting 

 from abnormal winds during the winter of 1938-39, and to point out 

 the effect on the mortality of bergs en route to the Grand Banks. 



9. The volumes of flow, mean temperatures, and heat transfers of 

 the Labrador Current at South Wolf Island and of the West Greenland 

 Current at Cape Farewell, have been derived from observations made 

 in 1939 and compared with seven previous occupations of the Labra- 

 dor section and nine previous occupations of the Cape Farewell sec- 

 tion. Results have been tabulated and particular emphasis placed 

 on the seasonal variation of the temperature of the West Greenland 

 Current in the interpretation of these results. Taking account of 

 this seasonal variation a negative correlation has been found to exist 

 between the mean temperature of the West Greenland Current and 

 its volume of flow with the conclusion that fluctuations in its volume 

 of flow arise chiefly from fluctuations in the East Greenland Ciu'rent. 



In the following table are given the data collected during the 1939 

 season and post-season cruises. The individual station headings give 



