mixing:, and the westward flowing water at this section may include 

 indeterminate amounts of the Grand Banks eddy and may be con- 

 tributed to by mixed water recirculating in closed counterclockwise 

 eddies between the remnants of the Labrador Current and the outer 

 margins of the North Atlantic eddy. 



Although there have been about 30 occupations of each of these 

 sections beginning with the 1934 season, the great variations from year 

 to year have made it difficult to derive any sort of normal seasonal 

 variation. Provisional normals based on simple straight line relation- 

 ships were determined in 1948 from plots of all data then available 

 and are repeated here with volume of flow expressed in units of 1 

 million cubic meters per second and m.ean temperature expressed in 

 degrees centigrade. The values apply at a date of 15 May, the middle 

 of the 4-month season through which the rates of change are appli- 

 cable. 



Volume of flow 



Mean temperature 



Section T. 

 Section T'. 

 Section W 



3.43 decreasing 0.67 per month. 

 5.40 decreasing 0.56 per month. 

 3.61 decreasing 0.26 per month. 



2.22 increasing 0.10 per 



month. 

 2.15 increasing 0.14 per 



month. 

 2.62 increasing 0.16 per 



month. 



The measurements of volume of flow, mean temperature and mini- 

 mum observed temperatm-e resulting from all vailable occupations of 

 these sections are presented in the following table. 



In table 1 as well as in the following discussion, volume of flow is 

 expressed in millions of cubic meters per second, and mean temperature 

 and minimum observed temperature in degrees centigrade. The table 

 shows the very considerable variations from year to year and the time 

 gaps in the observations. It will be seen that a mean line drawn 

 through plotted pohits of all observations for any section will over- 

 emphasize some years. For each section the greatest number of 

 occupations covering the greatest number of years occurred during the 

 month from 16 April to 15 May. A^'here a section was occupied more 

 than once during the month in any one year the mean value resulting 

 from such occupations was taken as the value for that year. Giving 

 each year equal weight, means were then taken for each of the sections 

 for the month 16 April to 15 May and plotted against the correspond- 

 ing mean date as one point on the normal curves of volume of flow and 

 mean temperature shown in figure 19. 



6a 



