l88 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 70 



and the temperature variations in our atmosphere at the earth's sur- 

 face. However, the eleven-year sun spot period in the temperature 

 curves is to a great extent overshadowed by the shorter interval 

 variations. 



RELATION BETWEEN THE TEMPERATURES OF DIFFERENT REGIONS OF 

 THE EARTH AND SUN SPOTS 



In order to bring out the longer periods more clearly we have 

 smoothed the yearly means given for different regions of the earth by 



Figure 65. Average variation of the air temperature during the sun spot 

 periods in the time 181 1 to 1910 according to Koppen (1914). 



Koppen which we took from Mielke's temperature series published 

 in his paper of the year 19 14. We have first taken consecutive 

 three-year means and from them as a basis eleven-year means. 

 These are shown in the curves of figure 66. At the top there is 

 given in a full drawn curve the smoothed relative numbers of sun 

 spots according to Wolfer's tables. The dotted curve gives the 

 consecutive eleven-year means of the smoothed relative numbers. 

 The other full drawn curves show the temperature variations in dif- 

 ferent regions of the earth smoothed as three-year means. The 



