84 



The Hydrography of the Faeroe- Shetland Channel 



June 4 ; those forming the second between July 4 and July 16. Thus 

 the middle dates are May 24 and July 10, and a comparison is of 

 particular interest, because these are the first sets of observations which 

 have been made in this area at dates close enough to admit of direct 

 comparison, or to give any idea of the rate at which changes occur. 

 In both sections nearly the whole channel is filled with water of 

 35'5 salinity or over, and in the depth temperature is low. The 



Fathoms xe M 





3S6 Mitres 



,r\ / 





/^ 



->J 



^ S S 



\f*^ 200 



/ 







100 





„S0 





500 



tj5Q 



3S0 \ 



L 



5 600 





U. 





700 











800 





VVALWIN. j^ 



JUNES. JULY 1901 300 







9S0 







.000 



Fig. 10. — Faehoe-Shetj.and Channel. Temperature and Salinity, June 

 and July, 1901. Yacht ' Walwin. 1 



freshest water (35 - 3) appears on the east side of the channel at a depth 

 of 380 fathoms, apparently indicating an intrusion of deep water from 

 the Norwegian sea into a mass of Atlantic water, which had been 

 cooled down in the same way as in the previous years. It is to be 

 observed that this centre of low salinity is also one of low temperature, 

 the readings at 300 and 400 fathoms rising from east to west. All the 

 western side of the channel is occupied by water of 35 5 salinity. In 

 the strata nearer the surface we find the first indication of the features 

 so strongly marked in 1902, in which the saltest and warmest waters 



