aground than groups as a whole. Larger bergs will travel at rates 

 comparable to smaller bergs if they can manage to remain sufficiently 

 offshore to avoid the numerous shoal areas en route. Over long dis- 

 tances chances are against the latter occunnng. The travel rates of 

 the WH-5 ice island fragments are of special interest, as in the late 

 summer of 1963 they were located in the vicinity of iceberg producing 

 glaciers in northwest Greenland, specifically those in Kane Basin 

 and Melville Bay. In early autumn of 1963 they were located in 

 northwestern Baffin Bay, an area also easily reachable at this time 

 by bergs calved in Jmie and July from all the iceberg glaciers from 

 Melville Bay south to Upernavik. If bergs oalved near Upernavik 

 in late July drifted north in the West Greenland Current and then 

 west as supposed toward northwestern Baffin Bay at a rate of 5 miles 

 per day, they would arrive off Jones Sound by the end of September. 

 Bergs making better time could arrive there at this time from Disko 

 Bay, the most distant glacier in northwest Greenland from the area 

 in question. The fact that ice island fragments did arrive at the 

 Grand Banks in early April is conclusive proof that bergs calved from 

 the iceberg producing glaciers of northwest Greenland during a given 

 summer can make it to the Grand Banks by next spring. Ironically, 

 the medium bergs have a better chance than the larger ones in this 

 case. This is not to say that the w^hole of a Grand Banks iceberg 

 crop for a given season was calved the previous summer. A given 

 season's Grand Banks crop undoubtedly includes a combination of 

 bergs calved the previous 3 or 4 summers. Bergs have difficulty in 

 getting clear of their parent glaciers and many spend a couple of 

 years trapped in the vicinity. The biggest liurdle that must be over- 

 come in order for a berg to survive to the Grand Banks is to properly 

 time its arrival into the Baffinland-Labrador Current system so as 

 to travel most of the route in protective pack ice. It is estimated 

 that bergs of medium or small size do not normally survive more 

 than 3 summers in Baffin Bay. Large bergs probably survive up to 

 5 years there. As pack ice normally disappears for about 2 months 

 in the vicinity of the northeast Greenland glaciers, considerable berg 

 deterioration probably occurs there each summer. More observations 

 in Baffin Bay are required to test the validity of these assumptions. 

 5. The travel time of a berg group from Cape Chidley to the Grand 

 Banks is normally about 3 months. The travel times of the three 

 1964 groups were close to 3 months during the winter months under 

 estimated slightly more favorable than normal wind conditions for 

 berg drift to the Grand Banks. However, it is believed that under 

 very favorable conditions, a group, or at least a few individual bergs, 

 can travel from Cape Chidley to the Grand Banks in 21/2 months. 

 The travel time of berg groups from Cape Dyer to the Grand Banks 

 is normally about 41/2 months during winter and early spring. The 



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