BJØRN HELLAND HANSEN AND FRIDTJOF NANSEN. 



M.-N. KL 



Fig. 8. Vertical Temperature-Curves of June and 

 September, 1910, for Stat. 4. Readings of Nan- 

 sen-thermometer are not corrected in broken and 

 unbroken lines. The dotted line gives the cor- 

 rected temperature of June. 



/" Z' 3° 4 



-Om 



-WO- 



first part of the expedition, in June 

 (Sections I, II, and III), while those 

 of July and later have been about 

 0.13O C. too low. The curves of 

 Figs. 2 — 10 represent the tempera- 

 ture-readings of the Nansen-thermo- 

 meter as they are, without being 

 corrected for these probable errors, 

 and they do not therefore give satisfactor}' re- 

 presentations of the actual conditions. The dot- 

 ted lines in Figs. 7 and 8 represent the observa- 

 tions after having been corrected by a correction 

 of + 0.80 OC. 

 The correctness of the above conclusions as to the 

 errors of the Nansen-thermometer during the expedition, 

 are clearly demonstrated by the curves showing the verti- 

 cal distribution of density at the various stations. In 



Figs. II — 15 



Fig. 9. Vertical Temperature-Curves of July and September, 1910, for Stat. 29. 



curves are 

 drawn for a 

 great man}' 

 stations of 

 Sections I to 

 VI. All temperature-readings of 

 the Nansen-thermometer had 

 been corrected by -+- 0.13° C. 

 before the densities were com- 

 puted. The dots mark the den- 

 sities in depths where this 

 thermometer was used, the cros- 

 ses those of the reversing thermo- 

 meter. There is a striking difference between 

 the curves of June, Stations 2 — 13 (Figs. 11 and 

 12), and those of July, Stations 17 — 28 (Figs. 13 

 — 15). The latter curves continue their course 

 regularly downwards from the upper part, above 

 500 metres, where the Nansen-thermometer was 

 used, to the lower part where the reversing 

 thermometer was used. There are many small 

 irregularities in the curves which may chiefly be 



Or?t 



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