BIGELOW: COAST WATER EXPLORATION OF 1913. 



213 



is reversed, i. e., the water was saltest, depth for depth, next the land, 

 suggesting a movement of bottom water up the slope. The general 

 rule that the salinity of the upper layers rose steadily passing off shore 

 was broken at Station 10097; but this was probably due to local verti- 

 cal circulation, as evidenced by the vertical uniformity of salinity 

 for the upper thirty fathoms. 



The profile crossing the mouth of the Bay of Fundy from the coast 

 of Maine to German Bank (Stations 10098, 10097, 10096, and 10095, 

 Fig. 53) shows the same comparatively fresh shore water off the coast 

 of Maine, and the water was only slightly Salter on German Bank, at 

 the southern end of the profile. But the salinity was much higher in 

 the centre of the profile, where 

 33%o water came up to within 

 ten fathoms of the surface, 

 though the immediate surface 

 was slightly fresher there than 

 on German Bank. The course 

 of the curves over the outer part 

 of the Nova Scotia slope (Station 

 10096) is especially instructive 

 because they reveal the existence 

 of a zone of uniform water, be- 

 tween thirty fathoms and the 

 bottom (sixty fathoms) the sa- 

 linity of which agrees with the 

 eighty fathom level over the 

 basin (Station 10097). And 

 this, of course, suggests an 

 up-draught of bottom water 

 over the slope. Vertical circu- 

 lation was active in the shallow 

 water at each end of the profile ; 

 slightly more so on German 

 Bank than next the Maine coast, 

 as shown by the fact that the 

 difference between surface and 

 bottom salinity in thirty fath- 

 oms on the latter was only 

 •13%o, as against .23%o in forty 

 fathoms at Station J0098. 



A profile from the basin (Station 10093) toward the mouth of the 



Fig. 54. — Salinity profile from the eastern 

 basin of the Gulf of Maine (Station 

 10093 toward the mouth of the Bay of 

 Fundy (Station 10096). 



