294 



H. MOHN. METEOROLOGY. 



[norw. POL. EXP. 



We see from the Table, that the velocity of the wind is on the whole 

 obviously greater with cloudy weather than with a clear sky. The greater 

 velocity of the wind accompanies stronger ascending currents of air, causing 

 the formation of clouds. A clear sky with a lower velocity of the wind 

 belongs to an anticyclonic, a clouded sky with a higher velocity of the wind 

 to a cyclonic condition of the atmosphere. 



The following Tables show the diurnal period of the velocity in the form 

 of differences (smoothed) from the diurnal mean. 



