SCIENTIFIC RESULTS 



135 



These tables tend to corroborate earlier findings that the bulky, 

 full-contoured bergs are moved but little by the varial)le winds, force 

 4 to 5, Avhich ordinarily prevail south of Newfoundland during the ice 

 season, while the light-draft bergs, many examples of which come 

 south of the Grand Bank during spring, are appreciably affected by 

 the winds just as the tables show. In certain other regions, on the 

 other hand, the winds may exert an important effect. Along the 

 Labrador and Newfoundland coast during winter, for example, a 

 series of northwesterly gales such as sometimes last for days at a 



Wind Effect on the Drift of Small icebergs 



Figure 89. — In the case of a wind with a velocity of 4-5 

 Beaufort scale, the berg will drift 54" to the right of the 

 wind (in the Northern Hemisphere), at the rate of 6.7 

 miles per day ; line C on this figure. In the case of a 

 wind velocity of 6-7 Beaufort scale, the berg will drift 

 54° to the right of the wind at the rate of 10.2 miles 

 I5er day ; line D. 



time must move the ice, especially the pack, both forward and to the 

 right, tending to cany it in on the coast. Mecking (1906, p. 12) 

 states that in order to move an iceberg as ordinary currents clo, for 

 example, 10 to 12 miles per day, a wind must have a force of 6 to 7 

 Beaufort scale. According to our observations, the only bergs that 

 approach any such wind movement are the winged and fragile types 

 in the last stages of disintegration. The deeper draft bergs common 

 to Baffin Bay are moved only 4 miles a day by a Avind. force 6 to 7. 

 In the case of the deeper bergs drifting w ithin the bounds of an 

 ocean current such as the Labrador current, small influences due to 



120860—31- 



-10 



