EXrLOEATIONS^ WESTEEN ATLANTIC, STEAMER BACHE, 1914. 19 



east this strikingly saline layer is much thinner and it is twice inter- 

 rupted (stations 10189 and 10185), though it once more appears near 

 Bermuda. Over the northern end of the Bahama Bank the SG.S'^/oo 

 water is overlaid by fresher water, as described for the Jupiter 

 Inlet profile across the Florida current (p. 32). Below 1,200 meters 

 there is very httle further decrease in salinity: At 1,800 meters it 

 ranges from 34.96 to 35.0P/oo only, and judging from what is 

 known of Atlantic bottom water (Murray and Hjort, 1912; Nansen, 

 1912), it is probably practically uniform below that depth. Though 

 the curve of 35^/oo suggests a shght upwelUng of this abyssal 

 water in the center of the profile, the entire range of variation of 



Stations 

 179 181 



Fig. 13.— Temperature profile of the upper 1,800 

 meters, on a line running 200 miles southwest 

 from Bermuda. 



Stations 

 179 181 



Fig. 14.— Salinity profile of the upper 1,800 meters, 

 on a line running 200 miles southwest from 

 Bermuda. 



sahnity below the l,00()-meter level is so small that it is doubtful 

 whether this was really the case. ^ Certainly, temperature suggests 

 nothing of the kind but just the reverse. 



The relationship of these profiles to one another may be illustrated 

 further by charts of the temperatures and salinities at the 200, 600, 

 1,000, and 1,800 meter levels. 



At 200 meters salinity was remarkably uniform, the extreme range, 

 except for the cool, fresh water next the coast (station 10158, p. 45), 

 bemg from 36.427oo to 36.55Voo only. The temperature range (fig. 

 17) was also very small, 18.1° to 19.3° over most of the area. 

 Next the coast off Chesapeake Bay it was much colder (11.2° at 



