Results 31 to 40 of about 1,003 (174)

Changes in microstructure of snow under large deformations [PDF]

open access: yesJournal of Glaciology, 1991
AbstractA set of microstructural variables is selected to characterize the behavior of snow. Corresponding mathematical relations from quantitative stereology theory are presented along with relations and techniques required for numerical evaluation. An experimental investigation is carried out to determine changes in these variables for snow subjected
Michael Q. Edens, Robert L. Brown
openaire   +1 more source

Tomography-based monitoring of isothermal snow metamorphism under advective conditions [PDF]

open access: yesThe Cryosphere, 2015
Time-lapse X-ray microtomography was used to investigate the structural dynamics of isothermal snow metamorphism exposed to an advective airflow. The effect of diffusion and advection across the snow pores on the snow microstructure were analysed in ...
P. P. Ebner, M. Schneebeli, A. Steinfeld
doaj   +1 more source

EVOLUTIONARY CONCEPTION OF SNOW METAMORPHISM BASED ON CRYSTAL-MORPHOLOGY AND THEORY OF SYMMETRY

open access: yesЛëд и снег, 2015
The paper presents a novel approach to the study of development of microstructures in snowpack based on the crystal-morphology and on the fundamental laws of natural symmetry.
E. G. Kolomyts
doaj   +1 more source

Vapor flux and recrystallization during dry snow metamorphism under a steady temperature gradient as observed by time-lapse micro-tomography [PDF]

open access: yesThe Cryosphere, 2012
Dry snow metamorphism under an external temperature gradient is the most common type of recrystallization of snow on the ground. The changes in snow microstructure modify the physical properties of snow, and therefore an understanding of this process is ...
B. R. Pinzer   +2 more
doaj   +1 more source

A novel method to visualize liquid distribution in snow: superimposition of MRI and X-ray CT images

open access: yesAnnals of Glaciology
The relationship between the behavior of water in snow and its microstructure is crucial to improve the prediction of wet snow disasters. X-ray computed tomography (X-ray CT) is frequently used to observe snow microscopically.
Satoru Yamaguchi   +2 more
doaj   +1 more source

Spectral reflectance behavior of different boreal snow types

open access: yesJournal of Glaciology, 2019
Spectral reflectance of natural snow samples representing various stratigraphies was investigated in a controlled dark laboratory environment. Mean and Std dev.
Henna-Reetta Hannula, Jouni Pulliainen
doaj   +1 more source

Influence of Microstructure on Mechanical Properties of Snow

open access: yesDefence Science Journal, 1995
Snow, being composed of ice grains of varying shapes, sizes, orientations, etc., has been treated as a particulate material. The mechanical properties of snow have been described in terms of microstructural parameters. A set of variables, which characterise the microstructure of snow at the granular level, has been chosen and quantified following ...
K.C. Agrawal, R.K. Mittal
openaire   +1 more source

Comparing measurements of snow mechanical properties relevant for slab avalanche release

open access: yesJournal of Glaciology, 2019
Snow properties relevant to the fracture processes involved in dry-snow slab avalanche release include weak layer specific fracture energy, slab elastic modulus and density.
BENJAMIN REUTER   +4 more
doaj   +1 more source

Exploring the potential of forest snow modeling at the tree and snowpack layer scale [PDF]

open access: yesThe Cryosphere
Boreal and sub-alpine forests host seasonal snow for multiple months per year; however, snow regimes in these environments are rapidly changing due to rising temperatures and forest disturbances.
G. Mazzotti   +7 more
doaj   +1 more source

Studying Snow Failure With Fiber Bundle Models

open access: yesFrontiers in Physics, 2020
Snow is a highly porous material with properties that may strongly differ depending on the environmental conditions. On slopes, the layered snowpack may fail and avalanches occur.
Achille Capelli   +2 more
doaj   +1 more source

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