86 INTERNATIONAL ICE OBSERVATION AND ICE PATROL SERVICE. 



southward along the slope, in narrow, tapering shape, to about 43° 

 15' N., 49° 40' W., where it ceased. Off the east side of the Grand 

 Banks the Gulf Stream drift extended west to 47° 30' W., between 

 43° 30' N. and 44° 30' N. Its presence was noted at station 174, 

 where warm saline surface water, 50 fathoms in depth, was flowing in 

 a swirling northeasterly direction with an estimated velocity of 0.8 

 Imot per nour. Off the west slope of the Grand Banks a warm body 

 of salty water protruded northward in wedgelike shape (see chart 

 "H") to 43° 15^ N., 53° 00' W., making its effect felt in over the bank 

 as far as station "C." 



PROFILE NO. 4. STATIONS 176-180. 



This section runs from station "C" (see chart "A") over the west 

 slope of the Grand Banks to longitude 57° 10' W. It was taken 

 March 15-17 and corresponds in position to profile No. 1, for Febru- 

 ary 13-15, i. e., a month earlier. 



Salinity. — Atlantic water, > 35.00 "/oo, occupies stations 176 to 

 178, interrupted by a wide trough of fresher water, 435 meters in 

 depth, at station 177. On the slope of the bank we found fresher 

 water, and in on the bank, at station 180, the freshest water* in the 

 profile, "bank water." 



Temperature. — Warm water, >10° C, at stations 176 and 178 is 

 separated by a trough of colder water. We may state, from the 



Eicture given by this profile, that the northern edge of the Gulf 

 tream is present at both stations 176 and 178 to a depth of 300 

 meters. The fresher water in the upper 435 meters of station 177 is 

 characteristic of normal water lying south of the Grand Banks of 

 Newfoundland to the westward of the Tail of the Great Bank. Where 

 we had slope water in February, station 167, Profile No. 1, we now 

 find warm salt water. Gulf Stream, which has moved northward, 

 entirely flooding station 176 to 300 meters in depth. In on the bank 

 cold water of 0.4° C. has displaced the 2.1° C. water found there in 

 February. 



Due south of the Laurentian Channel the Gulf Stream has moved 

 north from 42° 10' N. to 42° 30' N. South of Cape Race it remains 

 the same as in February. Since the water south of the Grand Banks 

 of Newfoundland has remained quite the same in character over a 

 period of a month, there has been no flow of Labrador Current across 

 the Great Bank during this time. This agrees with previous oceano- 

 graphical observations in the vicinity of the Grand Banks of New- 

 foundland. (See Mathews, Report on the Work Carried Out by the 

 S/S. Scotia, 1913, p. 31.) 



PROFILE NO. 5. STATIONS 180 TO 183. 



This section runs south from station "C" (see chart "A") into deep 

 water. It was occupied March 17 to March 28. 



Salinity. — There is no outstanding feature to the isohalines. Bank 

 water fresher than 32.6 "/oo is found on the bank, and slope water, 

 33.0 7oo to 34.0 7oo» is on the slope; no doubt Atlantic water of 

 35.0 "/oo would have been found a few miles to the south. 



Tem.'perature. — This profile is instructive as being the first for the 

 1922 season to reveal unmistakably the presence of the Labrador 



