u 



NO. 4 TEMPERATURE VARIATIONS IN THE NORTH ATLANTIC 285 



ment with the two other curves is better than when the solar obser- 

 vations were less complete. 



As a rule, the agreement between the solar curves (S), and the 

 temperature curves (T), and the pressure curves (B) is direct, but 

 in some cases it is also inverse. This seems, for instance, to some 

 extent to have been the case with the pressure-difference (but partly 

 not the temperature at Bergen) in June and partly July, 1908, with 



Figure 106. 



Figures 100-106. Curves showing the 7-day means for the summer and fall 

 of the year 1908, 1909, 1910, 191 1, 1913, 1914, and 1916, of: S the "solar con- 

 stant"; B the pressure gradient (mm.) between Bergen and Christiania; T 

 the temperature at Bergen; V the variation of pressure (mm.) from day to 

 day at Bergen. 



The small letters of the curves indicate corresponding maxima and minima. 

 A minus befpre the letter indicates inversion. 



the pressure difference and partly temperature in July, 1909, in Sep- 

 tember, 1910, in July, 1914, provided that the obtained values for 

 the " solar constant " may be considered as sufficiently trustworthy 

 in these cases. It seems noteworthy that during 19 13 the curve 6^ for 

 the " solar constant " is on the whole descending, with decreasing 

 values, from August to October, while the curves T and B, for tem- 

 perature as well as pressure difference, are on the whole ascend- 



