Results 211 to 220 of about 5,848 (253)

Initiation and growth of martian ice lenses

Icarus, 2015
Abstract Water ice in the upper meters of the martian regolith is a major volatile reservoir. Although the geographic extent, burial depth, and thermal stability of this shallow ice are well understood, its origin, history, and stratigraphy are not. Over the past decade, a growing body of observational evidence has indicated that shallow ground ice ...
Hanna G. Sizemore, Aaron P. Zent, Alan W. Rempel   +2 more
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Experimental and theoretical characterization of frost heave and ice lenses

Cold Regions Science and Technology, 2014
Abstract A series of freezing experiments were conducted to simulate the frost heave in saturated silt samples with variable thermal boundaries. It is shown that before the frost heave occurs, a small amount of pore water is discharged out of the soil due to the sudden freezing of the super-cooled pore water, and that once the frost heave occurs, the
Jiazuo Zhou, Changfu Wei, Houzhen Wei, Long Tan   +3 more
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Factors influencing the growth of miniature ice lenses

Earth Surface Processes and Landforms, 1981
AbstractExperiments involving six soil types indicated that the production of miniature ice lenses is dependent on soil moisture content and grain size with lenses being produced in finer‐grained soils at lower moisture contents than is possible in coarser soils.
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The Formation of Ice Lenses in Unidirectional and Multidirectional Freezing Soil

Applied Mechanics and Materials, 2013
Experimental studies were conducted on unidirectional and multidirectional freezing of artificial soils in a rectangular cavity. The ice lenses were observed through transparent plexiglass plate. Temperature gradients in soil specimen were obtained during freezing process.
Xian Feng Zhu, Xiang Yang Wei, Xing Huang, Yun Peng Zhang   +3 more
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A model for water transport and ice lensing in freezing soils

Water Resources Research, 1993
A one‐dimensional model for water transport and ice lensing in incompressible saturated and solute‐free soil specimens is proposed for the simulation of small‐scale frost heave tests in the laboratory. The model considers (1) open‐system freezing in which the variables T and Pw are independent, (2) an ice lens that continues to grow as long as enough ...
J.‐M. Konrad, C. Duquennoi
openaire   +1 more source

Image processing method for observing ice lenses produced by the frost heave process

Cold Regions Science and Technology, 2020
Abstract During the freezing process of soil, the pore water is segregated into ice lenses with the help of continuous water migration to the freezing front. The in situ and migrated water cause significant frost heave and stress in all directions, which can threaten surrounding structures. Pore ice and segregated ice lenses directly cause changes in
Hao Zheng, Yuutarou Sasaki, Shunji Kanie
openaire   +1 more source

Subsoil investigation of ice lensing at the Calgary, Canada, frost heave test facility

Canadian Geotechnical Journal, 1988
Several frost heave mitigation modes were studied at the Calgary, Canada, chilled pipeline frost heave test facility. These included deeper burial (to increase the pressure on the frost front below the pipe) and replacement of the silty soil around the pipe with gravel for a noninsulated pipe.
L. E. Carlson, J. F. (Derick) Nixon
openaire   +1 more source

Spatiotemporal variation of ice sheet melting in the Antarctic coastal marginal zone and the influence of ice lenses and rain using satellite microwave observation

Polar Science, 2020
Abstract This study uses satellite microwave observations to examine the spatiotemporal variations of melting ice sheets on the slopes of Antarctica. These observations were focused on the coastal marginal zone and inland traverse route near Syowa Station.
Nuerasimuguli Alimasi, Hiroyuki Enomoto, Naohiko Hirasawa   +2 more
openaire   +1 more source