The sea west of Spitsbergen; the oceanographic observations of the Isachsen Spitsbergen Expedition in 1910 . r values than might be expected at some of the stations; this is partly indicated by the difference between the temperatures found by the insulated water-bottle and those found by the reversing thermometer in lower depths. It is therefore very probable that the small drop of mercury in the upper bulb has varied in size, and has at times been considerably larger than it was found to be after the return of the expedition. This has probably been the case during the first period of the expe
The sea west of Spitsbergen; the oceanographic observations of the Isachsen Spitsbergen Expedition in 1910 . r values than might be expected at some of the stations; this is partly indicated by the difference between the temperatures found by the insulated water-bottle and those found by the reversing thermometer in lower depths. It is therefore very probable that the small drop of mercury in the upper bulb has varied in size, and has at times been considerably larger than it was found to be after the return of the expedition. This has probably been the case during the first period of the expedition, at Stats, i —14 in June, 1910 (Sections I, II, and III). Fig. 2 shows the vertical temperature curves of Stats. 3 and 6(Section 11, of Stats. 23 and 25 (Section IV), and of Stat. 20 (Section VI,cfr. the chart, Fig. 1). The curves of the two stations of Section I 11OO izoo 1912. No. 12. THE SEA WEST OF SPITSBERGEN. Fig. 3. Vertical Temperature-Curves of Sect. I. Readings of (StatS. 3 and 6) make a curious bend betweenthe marks representing Om- Nansen-thermometer are not corrected. -r cr r 2 3 4. the lowermost determi-nation with the Nansen-thermometer and theuppermost observationwith the reversing thermometer, theobservations indicating a considerablerise of temperature between 400 and500 metres (Stat. 3) or between 500and 600 metres (Stat. 6). The vertical temperature-curvesof other stations of Section I (Fig. 3Iand of Section II I Fig. 4) exhibitsimilar irregularities. In nearly all ofthem there is a striking difference between the upper partsof the curves which pass through the observations made withthe Nansen-thermometer (marked with dots) and the lowerparts passing through the observations of the reversing thermo-meter (marked with crosses). The rise of temperature occurs at differentdepths of 300, 400, 500 or even 600 metres, always where the observationsof the reversing thermometer begin. There are obviously errors of Fig 4 Vertical of Sect. s
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