courses southward through the eastern portion, gradually curves westerly, 

 and then sets northward through the western portion. Further analyses 

 of these data suggest the possibility of two major eddies, one located 

 between the northern and central transect and the other located between 

 the central and southern transect. 



Previous investigations have shown the currents in this area to be 

 weak and subject to influence by prevailing winds. A review of the 

 currents while in the mooring bridle substantiates this latter fact, but 

 also shows current speeds as great as 1 knot. The most striking example 

 of wind -driven currents can be seen when comparing data for 11 and 12 

 March. During this period, water movement in the upper layer changed 

 almost 180 under the influence of strong northerly winds; maximum speeds 

 were obtained coincident with maximum winds. The following statements 

 are relevant to the 87 observations made during the period 9 to 13 March: 



1. Current gradient 10 to 100 meters: 

 Average, 0.2 knot; range, 0.0 to 0.8 knot 



2. Current speed at 10 meters: 



Average, 0.5 knot; range, 0.0 to 1.0 knot 



3. Prevailing current direction 10 to 100 meters : northeasterly 



4. Current direction variation 10 to 100 meters : 

 Average , 40 ; range , to 160 (Difference decreases the 

 longer a wind persists from one direction) 



5. The strongest current (1.0 knot) was observed setting 

 southeast during a northeasterly wind whose speed increased 

 from 16 to 24 knots in 4 hours. 



6. Below 100 meters, the current speed averaged about 0.3 

 knot with a range from <0.2 to 0.5 knot the first day on 

 station. The direction varied from northerly to east- 

 northeasterly. The remainder of the time the current 

 speed averaged about 0.5 knot with a range from <0.2 to 

 0.7 knot. The direction varied from north -northeasterly 

 to southeasterly. 



B. TEMPERATURE 



1. Surface 



The oceanographic observations collected during the Tongue of 

 the Ocean survey clearly demonstrate the homogeneity of the water masses. 

 Sea surface temperatures varied from a minimum of 23.76 to a maximum 

 of 24.10°C, or a difference of 0.34°C (0.61°F). From Q Tinker Rocks to 

 Green Cay, temperatures showed an increase from 23.76 C to 23.99 C, the 

 latter temperature being measured in the vicinity of Green Cay. Similarly, 



