during this survey. The northern arm of the North 

 Atlantic Current intensified and was calculated to 

 be flowing at 88 cm /sec between stations 11558 

 and 11559. 



The volume transport between these two 

 stations was 5.74 Sverdrups. The wide trough 

 region between the southerly flowing Labrador 

 Current and the North Atlantic Current was still 

 apparent. 



The volume transport of the Labrador Current 

 during this survey was: 



Section Volume Transport (x 10 6 M 3 /sec) 



A2A 5.16 



A2 mod. 2.50 



continued to flow easterly, south of Flemish Cap 

 although this part of the current was not well 

 sampled by this survey. The maximum speed of the 

 southerly flowing component of the Labrador 

 Current was found between stations 11670 and 

 11671 to be 35 cm/sec. The maximum velocity of 

 the North Atlantic current was found between sta- 

 tions 11680 and 11681 to be 75 cm/sec. 



The volume transport of the Labrador Current 

 for this final survey was: 



Section Volume Transport (x 10 6 M 3 /sec) 

 A2B 3.34 



A3 2.51 



A3A 1.44 



8-16 JUNE CGC EVERGREEN SURVEY 



This survey consisted of sixty-six STD stations 

 with Ice Patrol station numbers 11579 through 

 11645. Sections A4, A2A, A3A, A3, A3B mod. and 

 A 2 mod. and a special section connecting A2A and 

 A3, SS2 were occupied with a 3V2 day delay 

 between sections A3A and A3 for current meter 

 operations (Fig. 4). An extra section was added 

 between the western end of A2 and St John's, 

 Newfoundland. Station 11649 was deleted. The 

 most dominant feature of this survey was the 

 cyclonic pattern centered at about 43°30'N 

 48°30'W. The Labrador Current was flowing 

 easterly south of Flemish Cap. The maximum 

 calculated speed of the southerly flowing part of 

 the Labrador was 44 cm /sec between stations 

 11609 and 11610. The North Atlantic Current was 

 calculated to be flowing at 62.5 cm /sec between 

 stations 11602 and 11603. 



The volume transport of the Labrador Current 

 during this survey was: 



Section Volume Transport (x 10 6 M 3 /sec) 



A4 .07 



A3B mod. 2.42 



A3A 1.58 



A3 1.00 



A2A 2.79 



A2 mod. 1.31 



29 JUNE-3 JULY 



CGC EVERGREEN CRUISE 



The final survey of the 1974 Ice Patrol Season 

 was composed of Ice Patrol station numbers 11656 

 through 11689 taken along Standard Sections 

 A2B, A3, and A3A (Fig. 5). Two special sections, 

 SS3 and SS4, connected A2B to A3 and A3A to A3 

 respectively. A segment of the Labrador Current 



INSTRUMENTATION AND METHODS 



A Plessey Environmental Profiling System 

 (STD) Model 9040 was used in conjunction with a 

 Sonycraft, Inc. (Chicago, Illinois) Digital Data 

 Logger (DDL), a Kennedy Co., Inc. 1600R tape 

 recorder (Altadena, California) and a DDP-516 

 Honeywell Computer. For a further description of 

 this processing scheme see Rosebrook (1974), 

 Morgan, et al. (1976) or Hayes (1978). 



Deep-sea reversing thermometer and salinity 

 samples from Nansen bottles were compared with 

 the STD values at maximum cast depth. The 

 salinity of the Nansen cast samples was deter- 

 mined with an inductive salinometer. The STD 

 values varied from these quality control values by 

 - .07 to + .01C in temperature and - .40 to + .08% 

 in salinity. 



ANCHORED CURRENT METER STATION 



To formulate an idea of the actual Eulerian 

 currents encountered along the Grand Banks, 

 current meter measurements were made. From 

 2011Z on 27 April to 2111Z on 28 April 1974 the 

 CGC EVERGREEN was anchored in 102 meters 

 of water at position 45°36.8'N, 48°33.4'W. During 

 this time two Hydro Products current meters, 

 Model No. 502 were lowered over the side on the 

 end of the STD cable. These meters recorded on 

 strip charts current speed, current direction and 

 sea water temperature once every 30 seconds. 

 These meters were set such that they were to be 75 

 meters and 25 meters from the bottom. To deter- 

 mine the effect of the ship's motion on the current 

 meters, records were kept of the ship's heading. 

 The wire angle at the surface was recorded hourly 

 along with weather conditions. At 1500Z on 28 

 April the current meter wire became fouled on the 



