1912. No. 12. 



THE SEA WEST OF SPITSBERGEN. 



33 



Mohn's Stats. 

 283 and 308, 

 of July 5th and 

 2 1 St, 1878 (see 

 Figs. 21, 26) 

 are at about 

 equal distances 

 respectively north and south from 

 Hjort's Stats. 63 and 64. The 

 mean temperature of the former 

 stations is 2.97^ C., and that 01 

 the latter 2.68 « C. As Mohn's 

 stations were taken about 54 days 

 earlier in the season, their mean 

 temperature should be increased 

 3.51*^' C. The current should consequently, 

 this region, have been 0.83° C. warmer in 

 1878 than in 1900. We found above that it 

 should have been 1.34" C. colder in 1900 than 

 in 1910; if so, it should have been 0.51^0. 

 colder in 1878 than in 1910, while we found 

 above that it was 0.75^ C. colder, a disagree- 

 ment which is no greater than might be expected, consider- 

 ing the very insufficient material of observations at our 

 disposal. 



Mohn's Stats. 306, 308, 314, 330 and 331 (of August 4th, 1878), 342 

 ^nd 345 (of August 6th and 7th, 1878) are between, as well as north and 

 south of Isachsen's Sections I and II (see Fig. 21). The mean temperature 

 of all these stations may therefore be compared with that of the two sections. 

 The mean temperature (100 — 400 metres) of Mohn's stations is 

 2.84 C. 



The mean temperature of Isachsen's Stats. 2, 3, 4, 5, 7, 8, 9, 10, 

 and II, is 3.07 ^ C. As Stats. 5 and 7 are farther west than any of 

 Mohn's stations, they might be left out; but this will make no appreciable 

 difference in the mean temperature. 



As the observations at Isachsen's stations were taken about 34 days 

 earlier in the season than those at Mohn's stations, their mean temperature 

 might be increased to 3.41 "C. in order to be comparable with the mean 

 temperature of the latter. The water of the current should accordingly 

 have been about 0.57" C. colder in 1878 than in 1910. This agrees fairly 

 Vid.-Selsk. Skrifter. I. M.-N. Kl. 19 12. No. 12. 3 



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