70 



FRIDTJOF NANSEN. 



M.-N. Kl. 



ally the case with the curve for the deepest layer (520 — 600 metres) near 



the bottom, giving the drift of the ship. 



The curves of velocity show that the relative movements were much 



smaller at Stats. 19 and 20 than at Stat. 41. They also seem to indicate an 



crn interval oflittle more than 

 5-130 



6 hours only between 



each time that the rela- 

 tive movement was redu- 

 ced to o or to a mini- 

 mum. The cause of the 

 slow movement at Stats. 

 19 and 20 may to some 

 extent have been the 

 contrary wind, which 

 probably reduced the 

 south-westerly surface- 

 drift. On the morning 

 of August 5th the wind 

 was about WbyS (mag- 

 netic); in the course of 

 the day the wind changed 

 to about SSW and in 

 the afternoon its velocity 

 increased to between 5 

 and 6 metres per second. 

 A wind of such a velo- 

 city has naturally an 

 appreciable effect upon 

 the drift of the ice. At 

 Stat. 41, on the other 

 hand, there was very little 

 wind, and it was as a 

 rule approximately in the 

 same direction as the 

 average drift of the ice. 

 During the night and 

 morning of August i8th 

 the wind was NE by N and was not strong. In the afternoon and the 

 evening it was northerly or north-north-easterly; after mignight and in the 

 morning of August 19th there was no wind. 



N 2 f 

 't.VIII.12 



• — W me/tuLS •- 



20 mc/its*r- 



-SCttic/us 



* •- -100 nitÛ£S X y^ ZOOmeAes 



.520-6'ÛÛ7fie&cs 



Fig. 56 — 59. Curves of Velocity (Figs. 56 & 58 above) and 

 Direction (Figs. 57 & 59 below) of the Relative Movements at 

 different depths at Stats. 19 and 29, Aug. 4 & 5, 1912. The 

 directions are magnetic and are those towards which the 

 water moved at the different depths relatively to the ship. 



