Table 2 shows the vohime of flow of the Labrador Current to have 

 been decidedly subnormal at sections T and U during the first survey. 

 During the second survey, while both sections w^ere still below normal, 

 section U had begun to recover and by the fourth survey was about 

 normal. The fourth surve}^ also showed partial recovery at section T. 

 The unusually large volume at section W in the first survey is consid- 

 ered to be made up partly of recirculating mixed water some of which 

 was also present at section U. 



The volume transport was close to normal at each of the sections 

 of the Bonavista triangle during the third survey but did not follow 

 the normal seasonal increase so that during the postseason cruise the 

 volume at the triangle was subnormal. The significance of the posi- 

 tive anomaly at the southwest section during this occupation is that 

 a smaller than normal proportion of the current was following the 

 eastern branch. The dynamic topography at the sea surface found 

 at the Bonavista triangle during the postseason cruise is shown in 

 figure 19. 



Of the other sections in the Grand Banks region only section F was 

 occupied more than once. The increase in volume at this section 

 between the second survey and the fourth survey is interpreted as 

 meaning that part of the Labrador Current continued farther south 

 before recui'ving to the northeast during the fourth survey than was 

 the case during the second survey. 



The mean temperatures were below normal at sections T and U 

 during the first two surveys and near normal at the time of the fourth 

 survey. At section W the mean temperature was near normal at the 

 first survey and above normal during the fourth survey. The mean 

 temperature at the Bonavista triangle w^as below normal during the 

 third survey and above normal at the time of the postseason cruise. 

 An exception to these general statements is that it w^ill be noted that 

 the mean temperature at the southeast section of the triangle during 

 the third survey was about normal as was section T during the fourth 

 survey. It will be remembered that the southeast section of the 

 triangle represents the eastern branch and that the third and fourth 

 surveys were close together in time of occupation. It is considered 

 that the subnormal temperatures and volumes and their recoveries 

 indicate an initial but decreasing deficiency in that component of the 

 Labrador Current which is supplied by the West Greenland Current. 



The minimum observed temperatures were slightly colder than but 

 near normal during the first three surveys. The higher than normal 

 minimum temperatures observed during the fourth survey at sections 

 T, U, and W are looked upon as being the result of northeastward 

 recurvature of Labrador Current water although this is not so clearly 

 indicated by the volume transports. During the postseason cruise 

 the minimum observed temperatures at the Bonavista triangle were 

 close to normal. The circulation deduced from data in table 2 has 



61 



