joined by water which has recurved southward from the West 

 Greenland Current. Northward of about 59° N., to the beach at 

 Cape FareweU the West Greenland Current is shown. Since only a 

 single section is available, the direction of flow is uncertain and the 

 course of the dynamic isobaths shown in figure 13 has been deduced 

 by drawing heavily upon what is known from earlier observations and 

 upon the distribution of temperature and salinity. 



Of the several bergs tracked by the ship occupying ocean station 

 Bravo the only berg followed for several days was one first picked up 

 at 56°15' N., 51°25' W., at 1600 on 10 April. The successive positions 

 of this berg from 2000 on 10 April until 0630 on 21 April, when it 

 had been reduced in size to a growler, have been plotted in the left 

 half of figure 14. Plotted in the right half of this figure are the wind 

 observations reduced to a series of vectors representing one-fortieth 

 of the successive trajectories of an air particle starting from 56° 14' 

 N., 51°20' W., the position of the berg at 2000 on 10 April. The 

 resultant trajectory is shown as a vector directed toward 204^°. 

 Assuming that the wind current was directed 45° to the right of the 

 wind and that the wind factor was 0.025 the resultant water movement 

 has been plotted as directed toward 249)^. The resultant berg drift, 

 obtained from the left half of figure 14, was directed toward 168%° 

 and has been assumed to represent the resultant water movement 

 composed of steady current and wind current components. The 

 vector representing the water movement from steady currents, then, 

 had a direction of 103,%° and the average speed of the steady currents 

 was 3% miles per day or about 0.16 knot. 



The gaps in our knowledge are too large and numerous to permit 

 us to draw definite conclusions from the above. We do not know the 

 depth of the wind current with respect to the draft of the berg but 

 it is assumed that in April the stability of the water column in this 

 vicinity is slight. We do not know what seasonal variations in the 

 steady current pattern take place between April and July but we 

 assume they are small in this vicinity. The direction and speed of 

 the steady currents deduced in the paragraph above are of the order 

 of magnitude of those which can be found in figure 13 and it is con- 

 sidered probable that this berg (and the others found in the vicinity 

 of ocean station Bravo) arrived at this locality from east of Cape Fare- 

 well (rather than from the Labrador side). 



The temperature distribution along the section across the Labrador 

 Sea from South Wolf Island, Labrador, to Cape Farewell,. Greenland, 

 found during the 1952 post-season cruise is shown in figure 15. The 

 salinity distribution in the Greenland half of this section is given in 

 figure 16. Referring to the temperature section, the frigid part of the 

 Labrador Current is to be seen over the continental shelf and adjacent 

 to it is the warmer part of the Labrador Current over the continental 

 slope. The tongue of warm water, which usually extends from the 



48 



