MEASUREMENTS OF SNOW MASS FLUX AND TRANSPORT RATE AT DIFFERENT PARTICLE DIAMETERS IN DRIFTING SNOW

Citation
K. Sugiura et al., MEASUREMENTS OF SNOW MASS FLUX AND TRANSPORT RATE AT DIFFERENT PARTICLE DIAMETERS IN DRIFTING SNOW, Cold regions science and technology, 27(2), 1998, pp. 83-89
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Geosciences, Interdisciplinary",Engineering,"Environmental Sciences
Journal title
ISSN journal
0165-232X
Volume
27
Issue
2
Year of publication
1998
Pages
83 - 89
Database
ISI
SICI code
0165-232X(1998)27:2<83:MOSMFA>2.0.ZU;2-Z
Abstract
Wind tunnel experiments were carried out to investigate the snow mass flux and the snow transport rate as functions of friction velocity and particle diameter. Friction velocities obtained with an ultra sonic a nemometer was from u() = 0.15 to 0.39 m/s. The number flux and the pa rticle size of drifting snow were measured with a new snow particle co unter at heights of 16 to 61 mm above the snow surface. The horizontal snow mass flux at each particle diameter d, q(d), decreased exponenti ally with height q(d) proportional to exp(-lambda(d) z/(u()(2)/g)), w here z is the height, g is the acceleration due to gravity and lambda( d), is a dimensionless parameter. The constant lambda(d) was independe nt of friction velocity, and at larger particle diameters, approached to 0.3. The total snow transport rate increased with the power (3.96) of friction velocity, but the total snow transport rate at each partic le diameter showed that the power decreased with increasing particle d iameter, and approached to 3. (C) 1998 Elsevier Science B.V. All right s reserved.