8o 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 



perature for the corresponding- field io° to 19° west longitude for 

 the steamer route Channel to New York, and also for the region 

 Portugal to Azores. The result of this computation is seen in 

 figure 41 which gives well marked minima in the cold years 1899 

 and 1903, and maxima in the warmer years, 1901 and 1908. The 

 year 1904 shows no minimum for the Azores field, because in this 

 year it was cold both in the east and in the west, but along the 

 steamer route Channel to New York it was on the other hand con- 

 siderably colder in the western regions that in the eastern ones and 

 hence the anomaly difference which we have been speaking of is 

 negative and rather great for this more northerly region. 



If one compares these differences in temperature of the Atlantic 

 Ocean in the middle (30° to 39° west longitude) and the east side 

 (10° to 19° west longitude-) with the February temperatures at 



1898 °q IQQO |23^S6789I0 



Figure 41. Curves for the difference between the temperature anomalies 

 for one of the fields 30° to 29" west longitude and one of the most easterly 

 fields 10° to 19° west longitude along the route Qiannel to New York 

 (curve 44° to 49° N.) and in the region Portugal to the Azores (the four 

 other curves). 



Liepe's station i, he finds the peculiarity that the temperature at 

 Liepe's station i is high when the difference is small or negative, 

 and vice versa. In figure 42 we give the average curves for the 

 above mentioned differences. The full drawn curve shows the 

 mean of the four southerly station curves of figure 41 and the dotted 

 curve gives the mean of all five curves of figure 41. Under these 

 curves is given in the same figure the February curve for Liepe's 

 station i with the scale of temperatures inverted. We see that the 

 agreement between this curve and the above mentioned mean curves 

 is very striking. The yearly temperature curve for Liepe's station i 

 (from September to the end of August) is also shown in the same 

 figure. Since this yearly curve, as we have said, has great similarity 

 to the February curve, we should also expect a certain agreement 

 with the difference curve. 



