strength of the Atlantic Current as inferred from changes in the differ- 

 ence in sea level across the Gulf Stream at the Charleston-Bermuda 

 section. 



4. The mean temperature and volume of flow of the Atlantic Cur- 

 rent south of the Grand Banks has been deduced from section W 

 extended southward to the 38th parallel. 



5. The temperature-salinity relationships for the three water 

 masses found in the Grand Banks region in 1950 have been compared 

 with conditions found in earlier years. 



6. One complete and two partial triangular surveys of the area 

 immediately north of the Grand Banks have been discussed with 

 respect to stability of current pattern, volume of flow, and the division 

 of the Labrador Current into its eastern and western branches. 



7. A series of hourly current measurements made in the open sea 

 with a von Arx geomagnetic electrokinetograph and showing a rotary 

 cmTent of about 16-hour period has been presented. 



8. The thermal characteristics of the intermediate water of the 

 Labrador Sea found in 1950 have been compared with earlier measure- 

 ments and a return to the conditions which existed prior to 1940 noted. 



9. The continued deficiency of the Irminger Current component of 

 the West Greenland Current as deduced from salinity observations 

 has been noted with supporting evidence inferred from volumes of 

 flow and mean temperatm-es of the West Greenland Cm-rent passing 

 Cape Farewell and the Labrador Current passing South Wolf Island. 

 Exceptionally active circulation m the Labrador Sea and in the East 

 Greenland Current has been deduced from these measm-ements. 



10. The aerial ice censuses of Baffin Bay made in 1948 and 1949 have 

 been discussed with respect to partial and total survival rates of bergs 

 in their jom-ne}' from northwest Greenland to the Grand Banks region 

 and with respect to indication of important factors in berg mortality. 



The data cofiected during the 1950 season and postseason cruises 

 are tabulated below. The individual station headings give the station 

 number, date, geographical position, depth of water, and the dynamic 

 height of the sea surface used in the construction of the dynamic 

 topographic charts shown in figures 16, 17, 18, and 23 for which the 

 dynamic heights have been referred to the 1,000-decibar surface and 

 figure 29 for which the dynamic heights have been referred to the 1,500- 

 decibar sm-face. The depths of water are uncorrected sonic soundings 

 based on a sounding velocity of 800 fathoms per second. Where depths 

 of the scaled values are enclosed in parentheses the data are based on 

 extrapolated vertical distribution curves of temperature or salinity or 

 both. Asterisks appearing before observed temperatures indicate that 

 these temperatures were determined from the depth of reversal and 

 the corrected reading of an unprotected thermometer. The symbol 

 cFt signifies 1,000 (density-1) at atmospheric pressure and tempera- 

 ture t. 



93 



