closer to the true values. As a basis for comparison, the oxygen 

 solubilities for the Labrador-Greenland section were determined 

 by botli the nomogram of Kalle/ which is based on the solubility 

 values of Fox, and the nomogram of Richards and Corwin. Percent 

 saturation values obtained by both methods were plotted for the 

 section profile; although the absolute values differed, the relative 

 picture remained essentially unchanged. Since more definitive 

 solubility information concerning this controversy is lacking and 

 furthermore since 1961 oxygen solubilities were based on the Truesdale 

 et al. data, all oxygen solubilities for 1962 are likewise based on 

 Truesdale, et al. data. 



Figures 19 tln'ough 23 show chronologically the dynamic topography 

 found during the four surveys made during the season and the post- 

 season occupation of tlie Bonavista triangle. As in past 3^ears the 

 reference surface used was that of 1,000 decibars. The topography 

 found during the first survey, figure 19, shows a well defined Labrador 

 Current for the full length of the surveyed area, with a westward set 

 onto the Banks south of 44° N. The higher dynamic heights at 

 stations 7988 through 7993 are caused by the lower salinity water 

 found there. South of the Grand Banks the survey does not extend 

 far enough west to define the longitude where the Labrador Current 

 curves south and eastward. Cold mixed water extends southward to 

 about the southern limit of the survey near 49° W. An intrusion of 

 warmer Atlantic Current water into the area of mixed water at 

 44° N., 47°30' W., is to be noted. Eastward of this, at about 46°30' 

 W., a narrow tongue of colder mixed water extends southward beyond 

 43° N. At the eastern edge of the surveyed area the northwestern 

 margin of the Atlantic Current turns eastward at about 45° N. 



Figure 20, representing conditions found during the second survey, 

 shows approximately average heights at Cape Bonavista and at the 

 offshore corner of the Bonavista triangle (stations 8086 and 8115). 

 The axis of the Laborador Current, however, is not as far offshore as is 

 usual in the triangle. Characteristically, the Labrador Current bends 

 sharply southward just west of the channel between the Grand Banks 

 and Flemish Cap. Very little relief in the surface topography is to be 

 found in the northeastern part of the surveyed area. The pattern 

 found along the southwestern leg of the Bonavista triangle appears 

 normal for this area at this time of the year. Bergs entering from the 

 northwest betw^een about longitudes 50° and 51°50' W., would most 

 likely be carried by the eastern branch of the Labrador Current into 

 the southern section. 



9 Kalle, Kurt. Kinige Verbesserungen ziir Bostimmung des gelosten Sauerstoffs in Meerwasser. Annalen 

 der Hydrogr. Vol. 67, pp. 267-269, 1939. 



35 



