1915- No- 5- ROALD Amundsen's antarctic expedition : meteorology. 29 



The coldest month is August and the warmest December. The am- 

 plitude is 32'\o at Framheim, 22*^.2 at MacMurdo Sound. Framheim is 

 much colder than MacMurdo Sound, particularly in the winter months. 



As will be seen from the observations made by Capt. Amundsen on 

 his sledge-journey, there are very frequendy inversions of temperature 

 along the meridian of Framheim, even in the summer months. The force 

 of the wind is much greater at MacMurdo Sound than at Framheim. The 

 stronger wind mixes the lower, colder air with the warmer, higher air, 

 and the result is a higher temperature at the surface of the earth. 



The diurnal period of the temperature at Framheim is not at all 

 pronounced, as will be seen from the following Table. 



Sun below the horizon 



Sun above the horizon 



In the dark season there is no regular daily march of the tempera- 

 ture. Lower temperatures are more frequent at 2 p. m. than at 8 a. m. and 8 p.m. 



In the sunny season the temperature rises at 2 p. m. only i^ to 2° 

 above the daily mean. 



No temperatures above zero have been observed. The absolute ob- 

 served maximum is — 0*^.2 in December. The absolute Minimum is — 59*^-0 

 in August. Range 58^.8. 



Number of Days with Temperature 



April May June July Aug. Sept. Oct. Nov. Dec. 



below 



Tan. 



19 



Total 

 94 

 32 



