An extra-southerly extension of a section southward from the 

 Grand Banks was made, completely crossing the Atlantic Current, 

 and is discussed with reference to volume and heat transports 

 and compared with 1938 and 1950 occupations of similar sections. 

 It is suggested that previously accepted values for average trans- 

 port of the Atlantic Current in this area may be too small. 



A detailed analysis of the circulation in the upper 1,000 meters 

 is made on the basis of volume and heat transports and mean 

 and minimum observed temperatures at 19 selected sections across 

 the Labrador Current occupied during 1958. Tentative seasonal 

 normals of these characteristics, and the 1958 departures there- 

 from, are tabulated. 



The exceptionally vigorous circulation on both the Labrador 

 and Greenland sides of the Labrador Sea in 1958 is noted. The 

 heat transport of the Labrador Current off the Labrador coast 

 was found to be almost twice the normal value, due to above 

 average mean temperature as well as increased volume transport. 



The temperature and salinity of the intermediate and deep 

 waters of the Labrador Sea in 1958 are examined and compared 

 with averages for previous years. Net volume transports above 

 the 200-decibar level are computed and each is found to be a ap- 

 proximately one million 3 /sec, and both are in a northwesterly 

 direction. The significance of these figures is further discussed. 



vi 



