- 28 - 



I. Temperatures nt St<^tion 3 



In figure 35(a) the teinper«?tures nt Station 3 nre plotted for 



depths of 0, 50, nnd 150 metres for the period of November 1916 to 



May 1918. In November 1916, the temperatures nt depths '^nd 50 



o 

 metres were pmcticnlly the s^me (7.6 C,), while r^t 150 metres the 



o 

 temperature v/as 6.3 C. Enrly in December, however, the temperature 



o 

 was fairly uniform throughout (6.1 - 6,7 C,), It will be noted that 



temperatures increase with depth until the last week in Mnrch when 



o 

 conditions are approximately the s^^rae throughout (7,0 C,). The 



o 

 minimxam temperature of 1.5 C. in the surface layer is renched in 



early February, while the minimum is reached at 50 m„ in late 

 February, and at 150 m, in early April, In the period from the 

 time the waters are of uniform temperature until the time the mini- 

 mum surface temperature is reached, the changes in temperature repre- 

 sent one phase of the temperature cycle thnt occurs in inshore waters. 

 After this date, the effect of insolation begins to be noticeable 

 and the surface temperatures begin to rise. It is not until the end 

 of April that water temperatures at 50 metres ore greater than those 

 at 150 metres. The temperatures continue to rise until the peak is 

 reached in the surface layers in late August which marks the end of 

 the second phase in tb.e temperature cycle. However, the subsurface 

 v/aters continue to rise until about the end of September which repre- 

 sent the third phase. Thereafter the temperatures decrease uniformly 



at all depths until December when uniform tempemture conditions are 



o 

 approached with temperatures between 5,6 and 6,2 C„, m_arking the end 



of the fourth phase. Following the changes from this point on, we 



find that in 1917 the temperature of the water is fairly uniform 



o 

 until late in J^nunry with temperatures between 2,4 and 2,7 C „ j, the 



