84 



TEMPERATURE. 



The curves on figure 28 show a remarkable similarity in the yearly temperature varia- 

 tions at the four positions. At each station the fall from the summer maximum continues 



Dec Jan. Feb Maf April. May. June. July. Aug. Sepl. Oot Nov Deo. Jan. Feb. 



+30F 



+ 20F 



+ 10 F 



/• 



OF 



-ZQTf 



-30 F 



— 50F 



\ 



TEMPERATURE 



Cape Adore 



— ..— . Frcanheun 

 Bfjurier 



i 



'X 



^ 



Fig. 2^. Annual vaiiation of temperature. 



at a nearly constant rate for three or four months, and then is suddenly checked ; and there 

 are several months during the winter when the temperature is approximately constant. 



The physical meaning of these curves will best be investigated by comparing the temperature 

 variations on the Barrier with the variations in a similar northerly latitude and also with 

 the changes in solar energy. 



Mmn Temperature at 78° iV.— The mean latitude of McMurdo Sound, Framheim and the 

 north of the Barrier is approximately 78° S. The mean temperature at the correspondiu.s 



