PHYSICAL OCEANOGBAPHY OP THE GULF OF MAINE 



787 



southeastern part of the gulf and northward to the northern slope. It is possible 

 that in some years the inflow may continue actively until late in August; but the 

 data for 1913, 1914, and 1915 make it more likely that the indraft usually slackens 

 by the first of July, if not earlier, when a progressive tendency toward the regional 



Fig. 160.— Salinity at a depth of 200 meters, July and August, 1912 to 1915 



equalization of salinity naturally ensues by various local circulatory movements of 

 the water. It is also possible that slope water enters in much greater volume in 

 some years than in others. 



