Results 31 to 40 of about 515,079 (210)

Early-stage interaction between settlement and temperature-gradient metamorphism

open access: yesJournal of Glaciology, 2017
Snow metamorphism and settlement change the microstructure of a snowpack simultaneously. Past experiments investigated snow deformation under isothermal conditions. In nature, temperature gradient metamorphism and settlement often occur together.
MAREIKE WIESE, MARTIN SCHNEEBELI
doaj   +1 more source

A general treatment of snow microstructure exemplified by an improved relation for thermal conductivity [PDF]

open access: yesThe Cryosphere, 2013
Finding relevant microstructural parameters beyond density is a longstanding problem which hinders the formulation of accurate parameterizations of physical properties of snow.
H. Löwe, F. Riche, M. Schneebeli
doaj   +1 more source

SNOWMIP2: An evaluation of forest snow process simulation [PDF]

open access: yes, 2009
The Northern Hemisphere has large areas that are forested and seasonally snow covered. Compared with open areas, forest canopies strongly influence interactions between the atmosphere and snow on the ground by sheltering the snow from wind and solar ...
Essery, Richard   +19 more
core   +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

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

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

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

Dependence of thermal conductivity of snow on microstructure

open access: yesJournal of Earth System Science, 2008
A geometrical model, including different geometrical shapes influencing thermal conductivity of snow is proposed. The geometrical model has been assumed to comprise of unit cells having solid (ice) inclusion as an aggregation of spherical, cylindrical or cubical shapes with vertical connection, arranged in a cubic packing.
P. K. Satyawali, A. K. Singh
openaire   +2 more sources

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

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