SCIENTIFIC RESULTS 



153 



from following the miiiii drift: (A) a shoulder of warm Atlantic 

 watei- often deflects tlie outer part of the cold current with its ice 

 out jiast Flemish Cap (see fig. 10:3): and (r) the continual north- 

 Avesterly gales drive off great fields of })ack ice and whatever l)ergs 

 are entangled therein. 



An}' retreat of the warm salty inthrust between Flemish Cap and 

 the bank, any change in atmospheric circulation, or the dissipation 

 of the pack ice may initiate the file of icebei-gs down the east 



Gr^EENLAND BERGS IN TROPICAL WATERS 



Figure 98. — While the crew of the ice patrol ship dive 

 into troiiieal waters of 72° F., (ii- ^-u and icebergs 

 float in the offing. It has lieen found that the liergs 

 which enter the warm confine.'^ of the <Julf Stream, 

 south of Newfoundland, .seldom survive more than 

 a week or ten days. (C)fficial photograph, inter- 

 national ice jiatrol.) 



side of the Grand Bank. The fir.st bergs reach the Tail of the 

 Grand Bank early in April. These are believed to be the rem- 

 Inants of the previous season that have survived the summer's heat 

 in high latitudes and have remained frozen in the pack ice along 

 the American shore over the winter and started south again in 

 tlie spring. Bergs of tliis group usually show much disintegra- 

 tion, therefore they do not as a rule survive long in North Atlantic 

 Waters. The pack ice which has held them in the far north over 



