TOD #4536 



TOD #4536 was deployed on 7 

 May ( 1 27) in 500m of water on the 

 eastern edge of the Grand Bank 

 south of Flemish Pass in posrtion 

 45°42.0'N 48°09.6'W (Figure C- 

 1). TOD #4536 was carried south 

 by the Labrador Current roughly 

 following the 500m contour at an 

 average velocity of 44 cm/s until 

 passing south of the Tail of the 

 Bankon17May(137). Between 

 17 May and 3 July (184), TOD 

 #4536 meandered along the 

 front between the Labrador 

 Cun-ent and the North Atlantic 

 Current at an average vetocity of 

 32 cm/s. The location of the front 

 is particularly evident near42°N 

 47°W along the 1 0°C isotherm in 

 the METOC SST chart of 14-1 7 

 June (Figure C-3). The large 

 amount of time (47 days) that 

 TOD #4536 spent in this relatively 

 slow moving area explains the 

 shift of the velocity distribution 

 curve to the left (Figure C-2). 



On 3 July (184), the water 

 temperature increased from 9°C 

 to 1 1 °C and the velocity 

 increased significantly from about 

 20 to 60 cm/s indicating TOD 

 #4536 had been caught up in the 

 North Altlantic Current. It 

 remained in the North Atlantic 

 Current until 25 July (206). From 

 25 July until 5 August (21 7), TOD 

 #4536 drifted slowly at an 

 average velocity of 1 cnn/s. 



On 5 August, TOD #4536 was 

 picked up by a fishing vessel 

 working out of New Bedford, 

 Massachusetts and the TOD was 



subsequently retumed to the Ice 

 Patrol. The exact date TOD 

 #4536 was picked up by the 

 fishing vessel is not certain. The 

 drogue was attached to the TOD 

 when it was recovered. 



TOD #4527 



TOD #4527 was deployed 

 between the 200m and 500m 

 contours along the eastern Grand 

 Bank in position 46°34.8'N 

 47°22.8'Won30May(150) 

 (Figure C-1). It drifted south with 

 the Labrador Current at an 

 average velocity of 29 cm/s along 

 the edge of the shelf until 

 entering the North Atlantic 

 Current on about 22 June (173). 

 It remained in the North Atlantic 

 Current travelling in a generally 

 northeasterly direction at 47 cm/s 

 until 4 July (185). Between 4 July 

 and 18 August (230). TOD #4527 

 meandered generally northward 

 at 26 cm/s completing one large 

 cyclonic circle south of the 

 Flemish Cap. This period of time 

 was spent between the Labrador 

 Current and the North Atlantic 

 Current. 



On 18 August (230), TOD #4527 

 re-entered the North Atlantic 



Current and was carried again to 

 the northeast at 74 cm/s. On 28 

 August (240), TOD #4527 began 

 a slow cyclonic motion that 

 followed the isotherm pattern at 

 an average velocity of 27 cm/s 

 (Figure C-3). TOD #4527 exited 

 and re-entered the IIP region 

 during this section of the drift. It 

 continued this nx)tion until the 

 TOD failed on 1 7 September 

 (260). The drogue sensor 

 indicated \he drogue remained 

 attached until 1 1 September 

 (254). 



TOD #4529 



TOD #4529 was deployed on the 

 north side of Sackville Spur in 

 about 1 000m of water on 28 July 

 (209) in position 48°21.0'N 

 46''48.0'W (Figure C-1). It drifted 

 around the top of Flemish Cap at 

 an average velocity of 21 cm/s 

 until 1 8 August (230) when 

 it was caught up in the North 

 Atlantic Current. TOD #4529 was 

 carried in a generally northierly 

 direction at 36 cm/s until it exited 

 the IIP region on 1 4 Septemtjer 

 (257). This northward drift 

 corresponds well with the 1 2°C 

 isotherm as depicted on the 1 5- 

 1 9 August METOC SST chart 



Table C-2. 



1984 IIP TIROS Oceanographic Drifters Grounding in Europe 



59 



