ATLANT. DEEP-SEA EXPED. 1910. VOL. i) PHYSICAL OCEANOGRAPHY AND METEOROLOGY 



109 



12 JUNE 7910 

 9-UUU 2 3 



30- 



20 



10 



-^ 



M 



— (— 



72 



—I — 



^ 



1H 

 — 1— 



tS 



3T>:\7: 58 



OLflT 



■to 



■20 



'30 



t N -component 

 . E.- -„- 



Fig. 44. The N.- and E. -components of the current at Stat. 58, 9 metres. 



more than 367o« above the discontinuity layer and more 

 than 38"/oo below it. We may, then, take 37«/oo (and 14° C) 

 as a limit, and reckon water with lower salinity (and higher 

 temperature) as belonging to the upper current. The series 

 18 A and 18 B were obtained on 29. April between 11'' and 

 12'', and at about 14'" L. M. T. From the current measure- 

 ments made on the following day we may infer that the 

 upper current was weak when Stats. 18A and 18 B were 

 worked. SZ^/oo and 14" C. was found at about 35 metres 



in the first series and at about 30 metres in the second. 

 The series 18C and 18 D were obtained at times when the 

 upper current was stronger (18 D at the time of maximum 

 velocity), and 37°/oo or 14° C appeared at much greater 

 depths (about 100 metres). There are evidently great tidal 

 variations in the vertical extension of the two currents. 

 The figure on p. 101* seems to show that the water 

 between 150 and 250 metres moved westwards during 

 the whole period of observation. The maximum velocity 



