Accession Number : AD0420410

Title :   ICE TRANSPORT BETWEEN GREENLAND AND SPITSBERGEN, AND ITS CAUSES,

Corporate Author : MCGILL UNIV MONTREAL (QUEBEC)

Personal Author(s) : Vowinckel,E.

Report Date : JUL 1963

Pagination or Media Count : 23

Abstract : Large quantities of ice are exported from the Polar Ocean, mostly between Greenland and Spitsbergen. An energy budget for the Polar Ocean must consider this energy source. Earlier estimates of ice export are re-examined and its variations are studied. The wind-caused component of the ice export was found by relating ice movement to the atmospheric pressure gradient. A 30-year period was used, and the wind-caused ice drift was calculated, for each month, at 80 N and 65 N. Information on the East Greenland Current flow is unsatisfactory, and indirect methods must be used in order to obtain the ice export by current. Charts of ice distribution south of 80 N were used. The results show that the wind-caused export is fairly high: about 1/2 of the current export and 1/3 of the total export. Condering variations in the current speed during the year, the resulting total ice export is found to lie about 5% below the estimate of Russian authors. Finally, the variations in annual ice export were calculated. The current export seems to be no more stable than the wind. The overall heat gain for the Polar Ocean will flictuate with a mean deviation of about 5%. A difference from the long-term mean, for a particular year, of 15 to 20% in the heat gain from ice currents is quite likely for the Polar Ocean. However, these are mainly rather short-term occurrences. (Author)

Descriptors :   (*ICE, MOTION), DISTRIBUTION, OCEANS, POLAR REGIONS, OCEAN CURRENTS, WIND

Distribution Statement : APPROVED FOR PUBLIC RELEASE