123 



eastward off the Grand Banks. The weak clockwise whorls previously 

 found near the edge of the Banks in about latitude 46° N., had been 

 dissipated, leaving the area between the 50- and 100-fathom curves 

 and between latitudes 46°00' N., and 47°30' N., very nearly mo- 

 tionless. Eastward of this area of quiet water, the Labrador Cur- 

 rent showed the same unusual breadth found during the third survey. 

 In previous bulletins of this series the seasonal variations in the 

 Labrador Current in the Grand Banks sector have been discussed 

 with especial reference to the seasonal maximum in volume of flow 

 which occurs in the month of May. The sections which have been 

 repeatedly occupied and which form the basis of the discussions are 

 as follows: Section T, running southeasterly from about 46°20' N., 

 49°00' W.; section U, running east and west at about the forty-fifth 

 parallel ; and section W, running south off the Grand Banks in about 

 longitude 50° W. During 1938 section T was reoccupied three 

 times and sections U and W were reoccupied four times each. The 

 volume of flow, mean temperature, and minimum observed tempera- 

 ture were investigated for each occupation of these sections and the 

 results are tabulated below along with similar results for all occupa- 

 tions of these sections from and including 1934. 



Table 1. — Showing volmne of flow in million cubic meters per second, mean tempera- 

 ture in °C., and minimum temperature in °C., of the Labrador Current in the 

 Grand Banks region 



.Section T: 

 1934,.. 



1936. 

 1937. 



Section U: 

 1934. 

 1935. 



1937. 



Average. 

 Section W: 



1934 



1935 



1936 



1937 



1938 



Average. 



to Apr. 15 



7.20 

 3.54 

 5.62 

 5.02 



0.54 

 5.44 

 2.35 



Mean 

 temp. 



-o!82 



-1.20 

 •1.24 



-0.29 

 -0.83 

 -0.75 



. 16 to May 15 May 16 to June 15 June 16 to July 15 



1.8 

 2.1 

 4.1 

 3.23 

 3.53 

 6.70 

 3.58 



3.48 

 5.92 



5^80 

 6.34 

 5.65 



1.17 



3.13 



8.78 

 5.48 

 5.78 

 4.87 



Mean 

 temp 



1.53 

 1.67 

 2.85 



-1.71 

 -1.56 

 -0.43 

 -1.49 

 -1.79 

 -1.44 



-1..37 

 -1.24 

 -0.94 

 -1.56 

 -0.71 

 -1.16 



-1.15 



0.02 

 0.08 



-0.99 

 0.39 



-0.33 



1.5 



2.71 

 3.15 

 1.96 



2^64 



3.11 

 4.46 

 3.90 

 2.29 

 5.14 

 3.78 



Mean 

 temp 



2.6 



2.06 

 2.90 

 1.55 

 1.85 

 2.19 



1.56 

 1.75 

 3.14 

 1.72 

 3.80 

 2.39 



1.07 



1.47 



Min. 

 temp. 



-1.50 

 -1.47 

 -1.22 

 -1.67 

 -1.52 



-1.70 

 -1.28 

 -1.23 

 -1.29 

 -1.43 

 -1.39 



1.88 

 4.30 

 2.56 



Mean 

 temp. 



Min. 

 temp. 



-1.25 

 -1.62 

 -1.52 



-1.41 

 -1.64 

 -1.57 



0.76 



1.59 



-0.22 



An inspection of table 1 shows that during 1938 the volume of flow 

 was greater than the 5-year average at each occupation of each section 

 and that the mean temperature was higher than average except for 

 the third and fourth occupations of section T and the fourth occupa- 



147469—40^ 9 



