Accession Number : AD0699288

Title :   ALBEDO MEASUREMENTS OF AN ARCTIC ICE COVER FROM HIGH TOWERS,

Corporate Author : MCGILL UNIV MONTREAL (QUEBEC) DEPT OF PHYSICS

Personal Author(s) : Langleben,M. P.

Report Date : 23 NOV 1967

Pagination or Media Count : 10

Abstract : Radiometers, suspended at a height of 15 m between two towers anchored to the bottom of the ice cover, have been used to measure the average or integrated albedo of the surface. The work was carried out in May 1967 at Tanquary Fiord, Ellesmere Island during the period when the surface of the ice cover was undergoing rapid change. The albedo was observed to have a value of almost 1.0, for a fresh snow cover, and about 0.8 for a weathered snow cover. It decreased to 0.6 as the wind partially cleared the surface of snow and gradually to 0.5 with further deterioration of the snow. The onset of melting, produced when the daily mean temperature exceeded 0C, rapidly lowered the albedo to a value of about 0.3. (Author)

Descriptors :   (*ARCTIC REGIONS, ICE), (*ICE, ALBEDO), RADIOMETERS, TOWERS, SURFACES, MELTING, SNOW, ARCTIC OCEAN, CANADA

Subject Categories : Snow, Ice and Permafrost

Distribution Statement : APPROVED FOR PUBLIC RELEASE