The Hydrography of the Faeroe- Shetland Channel 87 



35*4, and in the depth the isohalines of 35 - 2 and 35-1 appear to have 

 moved eastwards. Temperature has fallen at the surface, become 

 more uniform down to the 100-fathom line, and fallen at 400 and 

 500 fathoms. The June observations reveal for the first time, 

 observations being wanting for May, a steep gradient of temperature 

 on the east side between 100 and 200 fathoms. The 2° reading at 

 Station A3 at 200 fathoms in May makes it likely that a similar 

 distribution existed durine that month. 



Fig. 13. — Faeroe-Shetland Channel. Temperature and Salinity, July, 

 1902. Yacht ' Walwin/ 



In the July section the form of the isotherms shows a further 

 advance of cold water in the depth. Temperature has fallen generally, 

 and a wedge of cold water near Station A8 rises almost to the surface. 

 On either side of this, warm water, possibly parts of northward- 

 moving streams, extends down to something like 150 fathoms. In 

 the August section, drawn from the observations of H.M.S. Jackal 

 published in Nature, the cold wedge shows still further advance, and 

 its summit has shifted more into the centre of the channel. The low 



