109 



water was warm and salt enough to receive a tropical classification. 

 It was in this locality that we witnessed the final melting of berg 

 Xo. 2. 



PROFILE NO. 1— STATIONS 389-394 



The section was taken April 13-14 on the return of the patrol vessel 

 northward to the Tail of the Bank. 



Sat In If I/. —Water saltier than 35.00 ^/qq flooded the offshore stations 

 889 and 390. Water between 35.00 Voo and 34.00 Voo lay in the mid- 

 zone, while a fresher mass bathed the steep part of the slope. The 

 fresher water found, less than 33.00 Vpp, flooded all depths right out 

 to the edge of the Bank. 



Te?nperature. — A body of water warmer than 10° flooded the up- 

 per water layers to a depth of 250 meters (137 fathoms) ; its northern 

 bound was a sheer face just inshore of station 390. This body to be 

 so warm and salty must be classified with water belonging to the 

 Gnlf Stream.^^ The coldest water lay on the continental edge to a 

 depth of 150 meters (82 fathoms) but did not extend offshore or in- 

 shore over 18 miles. The intermediate zone, off the shelf, was very uni- 

 form in temperature, 3°-4° from surface to bottom, except at station 

 391 — 125 meters (68 fathoms)- — where a core of cooler water, 2.7°, 

 lay. Later this was found to be part of the main body of frigid water 

 on tlie slope, which recurled in tonguelike form. Tlie frigid water 

 on the edge of the Bank was similar in temperature and salinity to 

 that identified there March 22-23 as arctic in origin. A comparison 

 between stations 379 and 393 as to relative amounts of arctic water on 

 the slope reveals that an increase had occurred between March 23 and 

 April 14. 



A comparison between the Bank stations 394 and 383, although 

 separated by two weeks, possessed the same general character which 

 is evidence that a single large water mass, free from recent external 

 intrusions had prevailed over this region of the Grand Bank in all 

 depths. 



STATIONS 395-399 



Tliese stations were taken along the eastern edge of the Grand 

 Bank, where normally the heart of the south-flowing icy water is 

 found. Station 395, taken April 14, 12 miles northeast of 384, shows 

 little change to have taken place in the salinity or the temperature 

 during the interval of two weeks. Arctic water with a minimum 



-■» Smith. Edward II. : International Ice Observation and Ice Patrol Service. I'. S. 

 V. G. Bull. No. 11, 1923, p. 114. " Its northern face presented a nearly vertical tem- 

 perature boundary, a phenomenon which is characteristic of late winter and early 

 spring, when converted circulation has attained its maximum influence." 



