74 FRIDTJOF NANSEN. M.-N. Kl. 



By using these two different series at Stat. 19 and the observations 

 at Stat. 18 for our computation of the velocities of the current-conponents 

 directed perpendicularly to the section, we find the following values: 



Vertical Series of Stat. 19. Vertical Series of Stat. 19 c. 

 At the Surface 7.5 cm. /sec. 8.6 cm. /sec. 



„ 10 metres 5.4 „ 6.5 „ 



,, 20 „ 3.7 „ 4.8 



.. 50 -, 0.2 „ 1.3 



., 90 „ — 0.2 „ 



n 135 ., 0.0 



„ 180 „ 0.0 „ 



According to the progressive vector diagram of the relative move- 

 ment, Fig. 64, the average velocities and directions of the current at Stat. 

 20 should have been the following: 



At the Surface 7.8 cm. sec. towards Ssi'^W 



„ 10 metres 8.4 „ „ S 3i*'W 



20 „ 9.2 „ „ S35OW 



50 ., 7-5 ., » S25'^E 



If the angles which these currents would form with our section be 

 introduced in our computation, we find the following values of velocity: 



Vertical Series of Stat. 19. Vertical Series of Stat. 19 c. 

 At the Surface 9.8 cm. /sec. 11.2 cm. /sec. 



„ 10 metres 7.1 „ 8.5 „ 



„ 20 „ 4.8 „ 6.2 „ 



At 50 metres the current should have had a small eastward compo- 

 nent in our section, according to the current-measurements, while our com- 

 putations give small westward components. The dynamic current chart, 

 Fig. 67. might seem to indicate a direction of the current at 50 metres, at 

 Stat. 20, very different from the average direction found by the current- 

 measurements. 



On the whole, there is not a very good agreement between the velo- 

 cities obtained by our com.putations and the results of the current-measure- 

 ments. But it could hardly by expected to be better, considering the 

 deficiency of the current-measurements, and that they were taken at another 

 station a long time after the observations of the section. It has also to be 

 considered that there was a great difference of time between the observa- 

 tions at the two stations of the section. 



In the section through Stats. 20 and 21 the isopycnals between the 

 surface and 80 metres are sloping from Stat. 21 towards Stat. 20 (see the 

 isopycnals of 27.50, 27.70 and 27.80, Fig. 14) indicating a current with 

 some westerly direction, while the isopycnals at depths greater than 80 



