During the first 14 days following 

 its deployment (6-20 May,126- 

 140), 4560 nx)ved southeast- 

 ward to the northern part of 

 Flemish Pass. During this period 

 the buoy's speed varied over the 

 range 25-40 cm/s while the tem- 

 perature increased slightly 

 (1-3°C). The southward motion 

 through Flemish Pass approxi- 

 mately followed the 1000 m 

 isobath. The buoy speed 

 through Flemish Pass varied 

 from 20-35 cm/s, while the 

 temperature remained about 

 2-3°C. 



After departing Flemish Pass, 

 4560 left the slope and moved 

 slowly (< 20 cm/s) southeast- 

 ward. During this period the 

 temperature changed little. The 

 buoy trajectory in the region 

 south of Flemish Cap is complex. 

 Buoy 4560 remained in this 

 region for 31 days (9 June-10 

 July,160-191), during which the 

 surface temperature increased 

 from 8 to 12°C. 



On 10 July (191), 4560 began a 

 rapid and persistent movement 

 northeastward with speeds 

 varying over the range of 

 65-135 cm/s. During this period 

 the surface temperature in- 

 creased rapidly, from 12 to 16°C. 



BUOY 4536 



Buoy 4536 (Figure C-1 1 , C-1 2) 

 was deployed from BITTER- 

 SWEET at 43-39N, 48-1 2W on 7 

 May (127) in a warm-core eddy. 

 It provided data in the Ice Patrol 

 operations area for 152 days, 

 passing east of 39°W on 5 

 October (278). The drogue 

 sensor indicated an early drogue 

 failure, with detachment occurring 

 on 20 May (140), 14 days after 

 deployment. The buoy ceased 

 transmitting on 9 December 

 (343). 



Buoy 4536 remained in the eddy 

 for only 3 days. The data from 

 that period are presented in 

 Appendix D. The departure of 

 4536 from the eddy was marked 

 by an abnjpt decrease in surface 

 temperature (10.2 to 7.8°C in 

 about 5 hours) and a persistent 

 movement to the east. Over this 

 5-day period, 11-15 May (131- 

 135), the buoy accelerated form 

 40 to 1 10 cm/s and the surface 

 temperature increased from 6 to 

 over13°C. This motion and 

 temperature increase suggest 

 4536 entered the North Atlantic 

 Current. 



During the next 34 days (17 May - 

 20 June, 137-171) 4536 remained 

 in the region directly south of 

 Flemish Cap. The buoy's trajec- 

 tory in this area is complex, with 

 three anticyclonic and one 

 cyclonic loop. At times 4536 

 moved at over 60 cm/s. The 

 surface temperature varied form 

 8-1 2°C. These data suggest an 

 area characterized by North 

 Atlantic Current meanders and 

 eddies. 



Over the next 6 days (20-25 

 June, 171-176), 4536 moved 

 rapidly (70-125 cm/s) eastward 

 and then northward. The tem- 

 perature over the period re- 

 mained within 10-1 3°C. Forthe 

 remainder of its period in the Ice 

 Patrol operations area (26 June - 

 5 October, 1 77-278) 4536 re- 

 mained north of Flemish Cap. 

 The trajectory is complex but it 

 suggests that the flow in the 

 region was dominated by North 

 Atlantic Current meanders. The 

 temperature varied over the 

 range of 13-18°C. 



82 



