NO. 4 TEMPERATURE VARIATIONS IN THE NORTH ATLANTIC I3I 



Bruckner period. Curve e shows a small part of the possible Bruck- 

 ner period. In case the hypothetical values which may be found 

 from this curve should be eliminated from the values which are given 

 in curve d, one would obtain the values given in curve /. By means 

 of the different eliminations, the amplitude of the different changes 



IW8 1W5 lO OO \m 1902 1903 f90» l! K)5 IJOC 1907 J903 1909 1910 



r 



+05 





 +05 





 + 05 





 X05 



O 



-as 



*0-5 







105 

 



405 





 -05 



§ 



■SO 



Figure 54. The mean temperature of the North Atlantic Ocean Channel 

 to New York, for February (a) according to the two-year (b), three-year (c), 

 and five-year smoothing (d). b-d: curve for the difference between b and d. 

 e: curve of the possible Buckner period, f : the value of the curve, d: after 

 elimination of the curve e. S : the inverted sun spot curve. 



is somewhat diminished and in the construction of the curve / on 

 figure 54 we have taken account of this reduction and have employed 

 the values (f=}J-d — e) which are found according to Schreiber's for- 

 mula (see Wallen, 191 3). It seems proper to regard this curve as 

 a part of the sun spot period and accordingly one may produce the 

 curve as the dotted line shows, thus obtaining a regular curve in 

 which the difference between two succeeding maxima amounts to 



