Table II. Summary of volume, heat, and salt transports 

 obtained from occupations of Standard Section 3 



Date of 

 Occupation 



Total 



Southward Heat 



Volume Salt Transport 



Transport Transport (xlO»»CmV 



Ship (xlO»mVsec) (xlO«kg/sec) sec) 



14-15 Feb 



1966 CGC DUANE 5.87 204.2 19.0 



9-10 Mar CGC 

 1966 HUMBOLDT 4.95 176.4 18.4 



4-5 Apr CGC 

 1966 EVERGREEN 2.70 96.3 11.8 



16-17 Apr 



1966 " 3.97* 141.9 12.8 



18-19 Apr 

 1966 " 5.25* 188.3 15.0 



21 Apr 

 1966 " 1-80* 63.6 5.7 



25-26 May 

 1966 " 2.96 101.2 99.1 



* These values do not represent the total volume 

 transport, see text for explanation. 



from mid-March to mid April, the pronounced 

 increase in vokime flow observed in late April 

 1965 and 1966 was not indicated. These 

 volume transports were the most complex 

 ever observed by the International Ice Patrol. 

 Another remarkable feature of the volume 

 transports observed by CGC EVERGREEN 

 from 16-21 April was the large time rate of 

 change of volume transport. For these three 

 occupations, station locations were determined 

 by radar ranges and bearings on a moored 

 buoy. The changes observed in the volume 

 transports vary from +.64 X 10''mV sec/day 

 to -1.38 X lO^mVaec/day. At this point re- 

 member that the 16-17 April, 18-19 April, and 

 21 April occupations represent values that are 

 less than the actual total volume transport. 

 Figure 64 indicates that the volume transport 

 of the Labrador Current decreased in the late 

 winter and early spring and increased appre- 

 ciably over a short interval in mid-April. 



Figure 65 shows the salt transports and the 

 product of mean solenoidal temperature and 

 solenoidal volume transport, as a function of 

 time. Salt transport, heat transport, and vol- 

 ume transport for salinities and temperatures 

 less than 34.3%o and 2.0° C are shown in Fig- 

 ure 66. Kollmeyer, et al. (1967) used this cri- 

 terion to delineate the surface 200 meters of 

 the Labrador Current water. This criterion 

 was particularly useful when considering south- 



ward moving water overlying the continental 

 shelf from Cape Chidley, Labrador to the 47° 

 parallel of North Latitude. This water repre- 

 sented the surface 200 meters of the Labrador 

 Current as indicated by the 19-year mean tem- 

 perature-salinity curve developed by the In- 

 ternational Ice Patrol. This figure shows a 

 pronounced increase in the "Arctic" component 

 of the Labrador Current in late April. This 

 component did not show the pronounced de- 

 crease in transport values from 14-15 February 

 to 4-5 April. There was, however, a very slight 

 decrease of .06 x 10<'mVsec in uie Arctic com- 

 ponent during this interval. The product of 

 mean solenoidal temperature and solenoidal 

 volume transport and the salt transport both 

 showed this slight decrease from 14 February to 

 4 April 1966. This increase and decrease ob- 

 served with this component of the Labrador 

 Current indicated that the short increase in 

 total volume transport observed over the same 

 interval may be real. 



Figure 67 shows the volume transports for 

 each occupation of Standard Section 3 con- 

 ducted from 1950 to 1966. With one exception, 

 1966, these occupations occurred between early 

 April and early June. Two things should be 

 noted about this figure. The first is the varia- 

 bility of the volume transports. For example, 

 the 1965 volume transport showed a sharp in- 

 crease and a slight decrease with increasing 

 time. In 1954 there was a moderate decrease 

 and a slight increase with increasing time. In 

 1961 the volume transport started with a low 

 initial value that increased to a moderate 

 value. However in 1962, one year later, the 

 volume transport started with a high initial 

 value that decreased as the ice season pro- 

 gressed. The second point is that the 1966 vol- 

 ume transport was the most complex ever 

 observed. The most notable feature of the vol- 

 ume transport this year was the short time 

 intervals between volume transport determina- 

 tions. In other words, when the International 

 Ice Patrol conducted extensive surveys, six 

 weeks could elapse between occupations of a 

 particular section. This year reoccupations oc- 

 curred within 36 hours of each other. Conse- 

 quently, although other investigators have 

 reported volume transport variations, it was 

 assumed that the volume transport variations 

 between occupations were smooth. This year 



17 



