496 



H. MOHN. METEOROLOGY. 



[NORW. POL. EXP. 



The column Diff. 12 shows that the temperature during calms is al- 

 ways higher than the mean lowest temperature (p. 486), and the column Diff. 

 13 shows that the coldest wind (p. 495) has a lower temperature than the 

 calms in all months except February. The column Diff. 1 4 shows that 

 the temperature with calms is sometimes lower and sometimes higher than the 

 mean temperature (p. 483) of the respective months. The mean result obtained 

 is that the calms are colder than the month in winter ( 4 <c l) and autumn 

 (-- -0'4), and warmer in spring (+0'3) and summer (+0'7), colder in the 

 dark season ( 3'1), warmer in the sunny season (-f-0-4), and warmer in 

 the equinoctial months (-}-l'5). We have seen (p. 481) that the temperature 

 is lower with the weaker winds and higher with the stronger winds, except 

 in July and August. 



We have seen, (p. 472) that the temperature of the air in the dark 

 season is on an average a little lower during the day than during the night. 

 We have seen (p. 278) that at the same time, the north component of the 

 wind's frequency is greater than the southern component during the day, and 

 less during the night. The mean direction of the wind (p. 276) is S 51 E, 

 with which there is a corresponding temperature of 29'2. When the wind 

 backs towards the north, the temperature falls, when it veers towards the 

 south, the temperature rises. With ESE it is 31'3, with SE -29'5, with 



