centrated (to a salinity of about 34.80) could mix with the adjacent 

 West Greenland Current water of 4° and 35.00%o in about equal 

 proportions to produce the mixture of about 1.13° and 34.90°/oo 

 which would be of appropriate temperature, salinity and density to 

 supply bottom water of the characteristics found in the deeper parts 

 of the Labrador Sea. 



Winter time observations from the northwestern Labrador Sea, at 

 times when sea ice formation has had its presumed effect of salt con- 

 centration, are needed to verify this possible source of the bottom 

 water of the Labrador Sea. 



SUMMARY 



1. Four charts showing the dynamic topography of the sea surface 

 found during as many surveys made in the Grand Banks region during 

 the 1962 season have been presented. 



2. The temperature-salinity relationships in the different water 

 masses found in the Grand Banks region in 1962 have been compared 

 with the average relationships for the 15-year period 1948-62. 



3. Tentative normal seasonal variation relationships in the volume 

 transport and mean temperature of the Labrador Current have been 

 revised to include additional measurements at the sections comprising 

 the Bonavista triangle and sections G and F, and have been developed 

 initially for sections H and Fj. A similar revision for the West Green- 

 land Current at Cape Farewell has been presented. 



4. The volume and heat transports and mean temperature found 

 during 25 reoccupations of sections across the Labrador Current in 

 1962 have been compared with tentative seasonal normal values. 



5. The circulation in the upper levels in southern Baffin Bay and 

 Davis Strait, and at all levels in the Labrador Sea has been discussed 

 in the light of the distribution of temperature, saHnity and oxygen 

 observed during the 1962 postseason survey. A revised mechanism 

 for the production of the bottom water of the Labrador Sea has been 

 proposed. 



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