NO. 4 TEMPERATURE VARIATIONS IN THE NORTH ATLANTIC 



67 



In the year 1901 the temperatures were lower than in the years 

 1900 and 1902, a condition which we find dtipHcated in the average 

 curves for the fields further southward as shown in figure 48. A 

 rather poor agreement is found in the latter parts of the curves 

 where the anomalies for the time interval between 1905 and 1907 

 seem to be on the whole very much less than they are in the fields 

 further south. 



In March- April, 1898, the temperature was fairly low. This 

 does not correspond to the conditions of the ocean surface tempera- 

 tures in the fields further southward. However we find that the 

 air temperature for March-April in these southern fields averaged 

 distinctly low in the year 1898 (see fig. 49). Most of the curves 



1.^18 9'J 1900 I 



8 9 1900 



•So^. 



Figure 31. 



for March-April show in the years 1903, 1904, and 1905 a great 

 depression. In the later years 1905 to 1907 and 1908 the tempera- 

 ture in the northerly Danish fields was decidedly low. This is 

 shown by the curves in figure 32. 



The temperature curves for the two most easterly 10° longitude 

 fields of the Danish observational region show totally different 

 characteristics as well for February as also for March-April from 

 the above mentioned curves. In particular in March-April they 

 go inversely and are closely related with the curves of the most 

 easterly 10° longitude fields farther soi.i,th, 10° to 19° west longi- 

 tude in the region of the Channel to New York, and particularly 

 with the 10° to 19° west longitude region between Portugal and the 

 Azores. It appears therefore as if this difiference between the varia- 

 tions of temperature in the most easterly part of the North Atlantic 

 and the variations in the fields further out in the ocean is charac- 



