CLYDE SEA AREA. 



47 



It is an interesting fact that the homothermic mass of water covering the bottom 

 changed its temperature as rapidly as did the whole quantity of water, surface included, 

 and often more rapidly. There is no trace of these heat transactions taking place through 

 the upper layers, and the evidence points clearly to an equalisation of temperature 

 beneath by under currents, while the upper layers, if mixed at all, were so much influenced 

 by radiation or surface drainage from the land that equilibrium was rarely established. 



As all the stations of the Arran Basin showed the same order of phenomena, the 

 complete discussion of Garroch Head and Skate Island, where the observations were most 

 numerous, will suffice to illustrate the seasonal changes for the whole. 



Observations off Loch Ranza. — Observations were made at the head of Kilbrannan 

 Sound, about midway between the Island of Arran and Skipness Point, with Loch Ranza 

 open. This was in the deep channel of the West Arran Basin, before it united with the 

 West and Central Arran Basin off Inchmarnoch. 



Table XI. — Temperature Observations off Loch Ranza. 



No. . . . 



Date . . . 

 No. of Points 



Temp. . . 



Slope . . . 



H.D.*. . . 



h.t. . . . 



1 



9.2.87 



6 



44 



-0-6 



45 



44-0 



2 



30.3.87 



6 



43-8 



-0-2 



3 

 9.5.87 



6 



46-0 



+2-3 



4 

 18.6.87 



6 



50-1 



+6-4 



5 



7.7.87 



9 

 48-6 

 + 8-5 



10 

 46-3 



6 



22.9.87 



6 



53-1 



+3-6 







7 



5.12.87 



12 



48-3 



-0-3 



2.1.88 



9 

 459 

 -1-4 



35 

 46-2 



9 

 15.2.88 



9 

 44-5 

 -0-9 



30 

 44-7 



Only mentioned when sounding is 50 fathoms or over, and taken with reference to depth of 55 fathoms. 



The observations at this station were less satisfactory than at most of the others. In 

 the main they corresponded closely with those at Carradale. 



Observations off Largybeg. — Observations were made in the deep trough lying about 

 two miles east of Arran, with Largybeg Point abeam. This is near the southern end of 

 the great depression of the East Arran Basin, where it begins to shoal toward the 

 Plateau. 



Table XII. — Temperature Observations off Largybeg. 



No 



Date . . . 

 No. of Points 

 Temp. . . . 

 Slope . . . 

 H.D. . . . 

 h.t 



1 



9.7.84 



4 



50-0 



+9-6 



20 



47-9 



3 



12.8.86 9.2.87 

 13 



49-6 



+77 

 



43-4 

 -0-3 



4 



5.5.87 

 9 



44-8 

 +4-4 



5 

 17.6.87 



15 

 47-8 

 -(-6-1 



30 

 46-1 



6 



12.8.87 

 11 

 52-8 



+7-6 

 



20.9.87 



7 



53-3 



+2-5 



8t 

 5.10.87 

 11 

 53-9 

 + 0-6 

 30 

 53-5 



9t 



10.10.87 



10 



54-2 



+2-5 



30 



53-1 



10 

 10.12.87 



9 



48-0 

 -0-2 



60 

 48-0 



lit 

 13.1.85 

 14 

 45-6 

 -1-3 

 30J 

 45-8 



12 13 



17.2.88 30.3.88 

 9 



43-5 

 -1-5 

 30* 

 43-0 



41-9 



-0-5 



60 



41-9 



14 



8.4.8? 



9 



42-3 



+ 0-7 



50 



42-1 



15+ 



19.10.88 

 8 



517 



-0-4 



30 



51-9 



16 

 18.12.8; 



8 

 46-5 

 -1-9 







Depths assumed, 60 fathoms. Depths over 45 alone considered. 

 1 The Upper 30 Fathoms homothermic. + Observations by "Vigilant." J Compare with 12.1.88 when=60 and 45"3. 



