I9I5- 



No. 2. 



SPITSBERGEN WATERS. 



19 



50 and 450 metres, in this region was 0.90 C. colder in the summer of 

 1912 than in the summer of 1910. 



The mean value of the temperatures at 100, 200, 300, and 400 metres, 

 was 2.74'^ C. at our Stat. 57. and 2.95'^ C. at the Isachsen Stat. 10, giving 

 a difference of o 21 ^ C. As Stat. 57 was situated 20 miles south-south- 

 west of Stat. 10, and was taken 66 days later in the season, this difference 

 would have to be increased by about o.oS^C. and 0.66° C.^, and we find 

 that the current was about 0.95- C. colder in 1912 than in 1910. 



If the mean temperatures at our Stat. ^6 (3.19 "C.i and the Isachsen 

 Stat. II (3.60 '^ C.I be compared in the same manner, we find that the 



sif-To sc 



iOO 



200 



300 



hOO 



500 



600 



700 



C-r-1: 



iOO 



200 



300 



WO 



500 



600 



700 



-j^----:s- 



/ 



Figs. 15 & 16. Curves 

 showing the vertical 

 distribution of Salinity 

 (Fig. 15 to the left! 

 and Temperature (to 

 the right) at the Isach- 

 sen Stations 10 and 1 1 

 (of June 27, 1910) and 

 our Stations 57 and 56 

 • ofSeptember 1,19121. 



Atlantic Current was in that locality about 1.07 ^ C. colder in 1912 than 

 in 1910. 



It is not possible to draw any certain conclusions as to changes in 

 the temperatures of the current from the comparison of the observations 

 at such a small number of stations, especially considering how wery much 

 the conditions may alter at each station in very short time, both by verti- 

 cal and by horizontal movements of the water. Xevertheles there is a 

 fair agreement between the differences 0.90'^ C. 0.95 ''C, and 1.07 ^^C, 

 found independently in three different localities, and it seems to indicate 



^ Hellaxd-Haxsen and I found [1912, pp. 24 — 25] that the mean temperature of the water, 

 between 50 and 450 metres, of the Spitsbergen Atlantic Current was on the average 

 raised o.io^ C. in 10 days during the summer, from June and July to September. 



