960 



BULLETIN OF THE BUREAU OP FISHEBIES 



In August, 1914, the bottom water of the gulf, as represented by the dynamic 

 contours at 150 decibars (fig. 205), tended dynamically to drift across the basin from 

 northeast to southwest — i. e., from the Nova Scotian slope and the ofiing of the Bay 

 of Fundy toward the southwestern side of the basin, closely paralleling the March 

 state (p. 941 ; fig. 190) . The mechanism by which the deeps in the offing of Cape Ann 

 are kept supplied with slope water that has previously entered the gulf is thus made 

 clear. However, no direct dynamic drift seems to have been operative through the 

 Eastern Channel in either direction at depths as great as this that July or August, 

 contrasting with the strong outflow along its western side at the surface at the time 

 (fig.203;p. 958). 



Fig. 205.— Dynamic gradient, bottom to 150 decibars, July to August, 1914. Contours for every dynamic centimeter 



To test the constancy of the dynamic state of the gulf from summer to summer, 

 a dynamic chart of the surface is also offered for August, 1913 (fig. 206, stations 

 10086 to 10106). Unfortunately this is not as trustworthy as the chart for 1914. 

 because considerable interpolation of values, both for temperature and for saUnity, 

 was necessary in its construction. It is probable, also, that there was some error in 

 the one or in the other, as recorded for two stations in the eastern side of the basin 

 (stations 10092 and 10093), accounting in part for the contrast between the two. 

 Nevertheless, the general gradient that results is so consistent, from station to station, 

 that it may safely be taken as an approximation to the actual state of the northern 

 and western parts of the gulf at the time. 



