121 



tlio soutluM-ly llowinii; Lnbijulor C'unvnt on the ono side aiui i\w 

 northonstorly llowini: rot urn on the oIIum- side. 1( is n foatiiro proh- 

 jihly rosullinL:: from tlio holtoin conliLiinrnlion which in this ro^ion is 

 (loiiiinjitcd hv }> ivhitivoly hif2;h ridijo ox((Mulinu; sou Ihwosf ward from 

 Floniisli Clip. Tlio faot that nbnoi-nudly hi<rh tompcM-nturos jind 

 sidinitios woro found prossinjz; oloso in toward i\\o Wauks in Intitiido 

 4,")° N., leads to tho oonolusion that this unusually wido southwostorly 

 cuiront is niado u]) i)artly of truo Labrador Cuiront and i)artly of 

 niixo.l wattM- d(Maclu>d as a whoii fr(.iii {\\c bordcM- of llio Atlantic 

 Cun-ont. 



Tho results o{ \\\c third cuiront survov, Mav 1' I to ,][\uo (i, twe 

 shown in liii'urj^ 17. This map again shows I ho Labrador Curronl to 

 havo been ilowiuii- in unusual width, os|)0('iall\ uorlh of lali(u(h> 1(1" 

 N., but only a small ])art of it soonis \o bo id(Mitili(>(l with iJio vortical 

 contor usually associated with Flemish Cap. r>olw(>on latitudes 4{\°' 

 N., and 44*^ N., a lari2:e j)roportion of this stream recurved northeast- 

 ward, and south of latitude 45° N., some of it was dellected south- 

 westward into tho shallow water over tlu^ Baid<s leavin>z; oidy a com- 

 paratively narrow deep water band in which l)er<:;s could travel south- 

 ward t»)wai"d the United Statos-Kuropoan stoanuM' tracks. However, 

 (ho cui-ront, situation at tho Tail of the Baidvs was such that any 

 berijs reaching" that far were in favorable ])ositions to acoom])lish 

 unusually extended soutliM'ard drifts. Two weak clockwise whorls 

 near the edge of the Banks in about latitude 4()° N., were associated 

 with the eastward bulge in the Labrador (^irient which contributed 

 to the efl'eetiveness of the Atlantic Current in dellecting the large 

 part of the Labrador Current northeastward. This part of the 

 Atlantic Current intruded, as in the |)revious survey, not as a salient 

 but as a broad front. Tho Graml l^anks whorl, although weak, was 

 definitely present. 



Figure 48 shows the current map rosidting from tho fourth survey, 

 fhmo 21 to July 8. The map shows the triangular sha])ed pool of 

 mixed water south of the Tail of the Baidss. Tho circulation was 

 counterclockwise around this ])ool except at tho noitheaslern end 

 where there w^as a slight indication of eastwa.rd movenuMit as part of 

 the Labrador Current recurved northoa,stwar(l. Subsequent berg 

 nKnements, however, seemed to show that the 971.0- deeibar isobath 

 of the pool should have been coniu'cted with the sinn'lar isobath 

 farther north. At tho southwestern corner of (ho map the Gulf 

 Streain is seen to have been (lowing south-southeastward arid in the 

 southeastern part of the map the Atlantic Current was intruding 

 deeply tow^ard the Tail of the Banks and then bending sharply east- 

 uortheastAvard. The Labrador Current was apparently wider south 

 of latitude 45° N., than at the time of the third survey, even consider- 

 ing thai a part of the western edge of this band was water con(ril)ute<l 



