a 



w 

 w 



Hi 



cc 

 a 



500- 



1000- 



TEMPERATURE 

 (deg C) 



Figure D-3. Vertical distribution of temperature along transect marked A-B in Figure D-2. 



Drifters 



The drifter data are presented in 

 two plots. The first (Figure D-4) 

 presents trajectories of 4555 and 

 4556, both of which were Ice 

 Patrol operational drifters de- 

 ployed in the Labrador Current 

 north of Flemish Pass. 



Buoy 4555 arrived in the study 

 area on 20 April, approximately 

 two weeks before the start of the 

 hydrographic survey. Over the 

 next 6 days it traced an anticy- 

 clonic path approximately one-half 

 the way around the eddy's bound- 



104 



ary. The buoy speeds over this 

 period varied over the range of SO- 

 TO cm/s, while the temperature 

 varied over the range from 0.8 to 

 13°C, suggesting that the buoy 

 was close to the eddy's boundary. 



On 30 April, 4556 entered the 

 study area. Like 4555, buoy 4556 

 moved rapidly (50-70 cm/s) to the 

 east, north of the eddy. However, 

 buoy 4556's temperature record 

 was quite different, with a slow 

 increase from 0.6 to 2.0°C over 

 the period during which it re- 

 mained in the area. 



Figure D-5 presents the drifter 

 data from the four buoys deployed 

 by BITTERSWEET. They are 

 plotted on a map of the surface 

 dynamic topography (relative to 

 1000 db) calculated from the first 

 phase (5-10 May) hydrographic 

 survey. The buoy tracks are for 

 the same period as the survey. 



Both the dynamic topography and 

 4536's drift track suggest that the 

 eddy was interacting with the 

 North Atlantic Current. Buoy 4556 

 did not complete one entire circuit 

 around the eddy before it departed 

 to the east and left the study area. 



