Accession Number : AD0721488

Title :   Climate and Energy Exchange on a Sub-Polar Ice Cap in Summer. Part D. On the Vertical Turbulent Fluxes of Water Vapour at Ice Cap Station,

Corporate Author : ARCTIC INST OF NORTH AMERICA WASHINGTON D C

Personal Author(s) : Holmgren,Bjoern

Report Date : 1971

Pagination or Media Count : 34

Abstract : The vertical turbulent flux of water vapour E at the snow surface is calculated by means of three-hourly determinations of wind speed at a low level, (0.5 - 1.0 m); water-vapour pressure at 1.5 m; and temperature profiles for indirect determination of the temperature and water-vapour pressure at the snow surface. The temperature of the snow surface is determined by extrapolation of temperature-profiles down to the snow surface. The method is 'calibrated' by reference to the conditions over melting snow. Humidity profiles measured with Assmann psychrometers at different levels are also utilized in the analysis of the humidity-field in the layer below the 1.5 m level. The discussion includes a comparison with a semi-empirical model suggested by Sverdrup. The variations of E in different weather situations are described. (Author)

Descriptors :   (*CLIMATE, ARCTIC REGIONS), (*HUMIDITY, MEASUREMENT), ATMOSPHERIC TEMPERATURE, GLACIERS, CONVECTION(ATMOSPHERIC), SNOW, CANADA

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE