These small cold cores appear to be the only con- 

 nection of this section with those to the north. 

 The eastern limits of section F grade warmer and 

 more saline, virtually eliminating any speculation 

 that the water from the north is skirting the east- 

 ernmost stations. 



With the east eliminated as a pathway for the 

 cold, low-salinity water from the north, section E 

 would therefore represent one route taken by this 

 southward moving water. Section E displays the 

 considerable amounts of cold, low-salinity water 

 expected. The cold core observed in section F, 

 close to Resolution Island represents the other 

 route taken by this water. This flow of water 

 from the north was described in both the dynamic 

 height and the isentropic charts. After leaving 

 section F, the cold water turns to the west, just 

 south of Resolution Island and flows into Hudson 

 Strait. 



Section D, across the entrance to Hudson Strait, 

 shows cold, low-salinity water in stations 9457 and 

 9458 just south of Resolution Island. In the 

 deeper half of section D, warmer, higher salinity 

 water is present, similar to that found in section F 

 and probably connected with it. The isotherms 

 and isohalines are severely sloped downward to the 

 south in section D and show the existence of water 

 lower in salinity then has been found thus far. 

 Section D', obtained just inside of the strait 

 entrance shows similar salinities, but much lower 

 temperatures. This same situation exists in sec- 

 tion C, figures 14 and 15, taken east of Cape Chid- 

 ley. Lower salinities then found to the north are 

 present along with reasonably cold water. The 

 circulation has already been shown to be out of the 

 strait through D', D, and C. The water property 

 sections supports this with the exception of the 

 lack of any very cold water directly in the strait 

 entrance, section D. This has been discussed in 

 the previous section and will be mentioned again 

 in the treatment of T-S curves below. 



The shelf depth to the south of section C be- 

 comes shallower, probably accounting for, in part, 

 the anomalous dynamic height contours and the 

 apparent damming or buildup of low density 

 water in the western half of this section. Section 

 B and A to the south, show the cold, low salinity 

 cores of the Labrador Current. 



Section J, figures 14 and 15, is presented for 

 general interest showing the imiformity in tem- 

 perature and salinity of the central Labrador Sea 

 down to Ocean Station BRAVO. Only in the 

 north are there any characteristic differences. 



This small core of lower temperature-salinity 

 water represents the southern boundary of the 

 westward flowing filaments of the West Green- 

 land Current. 



TEMPERATURE-SALINITY RELATIONSHIPS 



Figures 16 and 17 show the T-S diagrams for 

 each station taken in the vicinity of the Hudson 

 Strait entrance. On each T-S diagram there is 

 a cross ( + ) giving the location of the upper limits 

 of the defined water mass of 2° C. and 34.3%o. 

 Shown also is a comparative diagram of the 17- 

 year mean of the water mass characteristics of the 

 Labrador Current. 



Comparing the eastern ends of sections G, F, 

 C, and B of figures 16 and 17, the rather abrupt 

 changeover of the water mass characteristics is 

 apparent. As the easternmost stations are ap- 

 proached, the T-S relationships changes from 

 within the defined limits to completely outside, 

 thus forming a good eastern boundary for later 

 volume analysis. Section F shows very little of 

 the defined water except at stations 9471 and 9470. 

 However, there is still a profound change in the 

 T-S relationships offshore between stations 9465 

 and 9464. The warm, saline waters located at the 

 eastern ends of these sections are those of the 

 Labrador Sea. The transition zones between the 

 characteristic defined water and that of tlie Labra- 

 dor Sea, are naturally coincident with the swift 

 flowing boundary current shown in the dynamic 

 height chart figure 8. 



The water characteristics of section E match 

 very well the charactristics of the water to the 

 north in section G. This, as pointed out above, 

 seems to be one of the paths that cold water takes 

 flowing from the north. Stations 9471 and 9470, 

 of section F, are a second path taken by this water 

 as it flows south and can be followed through 

 Hudson Strait entrance, section D, at stations 

 9458 and 9457. The water flowing south in the 

 vicinity of stations 9469 through 9566 of section 

 F, seems to match characteristics with the waters 

 at stations 9437 and 9436 of section C. This agrees 

 quite well with the dynamics shown in figure 8 

 where an area of low topographic definition dis- 

 plays a slow meandering current which moves 

 west and then recurves to the southeast and flows 

 through section C. 



In section D, station 9455 appears to be at the 

 transition zone between the characteristically lower 

 salinity water running out of Hudson Strait and 



10 



