The sea west of Spitsbergen; the oceanographic observations of the Isachsen Spitsbergen Expedition in 1910 . it reached the desired depth. Accidents such as thesemight often happen with the old Pettersson bottle, according to our experi-ence. But whatever the reason may be, Arrhenius temperature-readingscannot at any rate be considered trustworthy for depths greater than300 metres. By using the vertical temperature-curves of his four stations representedin Fig. 31, and trying to correct for the most obvious errors, we havefound a mean temperature for 100, 200, 300, and 400 metres, of °C. 3
The sea west of Spitsbergen; the oceanographic observations of the Isachsen Spitsbergen Expedition in 1910 . it reached the desired depth. Accidents such as thesemight often happen with the old Pettersson bottle, according to our experi-ence. But whatever the reason may be, Arrhenius temperature-readingscannot at any rate be considered trustworthy for depths greater than300 metres. By using the vertical temperature-curves of his four stations representedin Fig. 31, and trying to correct for the most obvious errors, we havefound a mean temperature for 100, 200, 300, and 400 metres, of °C. 38 HELLAND-HANSEN AND FRIDTJOF HANSEN. Kl. The mean tempe-5 6° rature of Isachsens 1 I | i **-^ Stats. 17, 18, and19 of July r 7th —18th, 1910, C. \ving to the hig-her latitude and the later season,the mean temperature of Arrhe-. nius stations should be reduced to about ° C. for com-parison with that of Isachsens stations. The current should accordingly have been C. colderin 1896 than in 1910, but this result will have to be con-sidered as very doubtful. The mean temperatures for 100, 200, 300. and 400metres for other stations in this region, are given in the fol-lowing table: 17 \ 1817. VII. 10 A 3 & A 421. VIII, 96 M 361 13. VIII. 78 Ma 102. VII. 99 3719. VIII. 10 B3 10. VI. 05 MeantT. < ° c? c. c. C. c. Corrected to July 17th. 1 At Isachsens Stat. 37 ami the Belgica Stat. 3 (B 3), the temperature in too metreshad to be taken from the probable vertical temperature-curves. 1912. No. 12. THE SEA WEST OF SPITSBERGEN. 39 According to the corrected values in the lower line of this table, thecurrent in 1878 was ° C, in 1899 °-58° C. lower than in 1910, whilein 1905 it should have been C. and in 1896 C. warmer thanin
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