62 



BJ0RN HELLAND-HANSEN 



[REP. OF THE "MICHAEL SARS" NORTH 



SaO 27-8 

 350 -2 



4° 5' 



■6 

 A 



1400 



■4 -2 270 26-8 -6 -4 2 260 25-8 



■6 -8 360 %o 



7° 8°^ 9° 10° n° i2° 13° 



iS° 1G° il° 18° 15" 



Fig. 21. Comparison between the "Michael Sars" station 89 (in 1910) at 45° 56' N.. 22° 24' W. and the 

 "Armauer Hansen" station 58 (in 1914) at 45° 45' N., 22° 15' W. 



ences of salinity which for the most part accord well 

 with the general rule of correspondence between tempe- 

 rature and salinity. The differences of temperature are 

 obviously not attributable to such seasonal changes as 

 start from the surface and propagate downwards. The 

 largest differences at depths between 200 and 600 metres 

 are, in fact, exhibited by the curves in Fig. 22, represent- 

 ing a case where the higher temperatures were observed 

 towards the end of June (1922) and the lower towards 

 the end of July (1910). Owing to variations in salinity 

 parallel to those in temperature, the densities were prac- 

 tically identical at both stations. In the two other cases 

 the differences of temperature (and of density as well) 

 were only small at the depths named. 



Below 600 metres the variations are considerable 

 larger than at the higher levels. We will only give a 

 few characteristic examples. At the "Michael Sars" sta- 

 tion 89 on July 20th, 1910, the temperature at 800 metres 

 was nearly half a degree centigrade higher than at the 

 "Armauer Hansen" station 58 on July 10th, 1914 (Fig. 

 21). The difference of salinity was, relatively, larger still, 

 so the density was higher at the warmer "Michael Sars" 

 station than at the other. At 1000 metres the tempera- 

 ture was higher at the "Armauer Hansen" station than 

 at the "Michael Sars" station. By finding the anomalies 

 of salinity based upon the temperatures observed, we ob- 

 tain the following values: 



