Frost heave

Rempel, A. W.

doi:10.3189/002214311796406149

Cited by 72 publications

(40 citation statements)

References 39 publications

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“…In fact, a number of experiments have demonstrated 'frost heaving' by materials that contract upon freezing [12], more recently using helium [13] and argon [14]. For all practical purposes, frost heaving in nature is due to the addition of water to freezing soils as water is thermodynamically drawn to the freezing front from nearby areas [15].…”

Section: Freezing In Porous Media and Frost Heavingmentioning

confidence: 99%

“…Heaving has been the focus of considerable theoretical study [15,[24][25][26]. Recurrent ice lens growth and decay lead to upfreezing, the differential motion of stones relative to the surrounding soil; this motion is generally in the direction of heat flow during the freezing period, usually upward toward the ground surface.…”

Section: Freezing In Porous Media and Frost Heavingmentioning

confidence: 99%

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Stone circles: form and soil kinematics

Hallet

2013

Phil. Trans. R. Soc. A.

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Distinct surface patterns are ubiquitous and diverse in soils of polar and alpine regions, where the ground temperature oscillates about 0°C. They constitute some of the most striking examples of clearly visible, abiotic self-organization in nature. This paper outlines the interplay of frost-related physical processes that produce these patterns spontaneously and presents unique data documenting subsurface soil rotational motion and surface displacement spanning 20 years in well-developed circles of soil outlined by gravel ridges. These sorted circles are particularly attractive research targets for a number of reasons that provide focus for this paper: (i) their exceptional geometric regularity captures the attention of any observer; (ii) they are currently forming and evolving, hence the underlying processes can be monitored readily, especially because they are localized near the ground surface on a scale of metres, which facilitates comprehensive characterization; and (iii) a recent, highly successful numerical model of sorted circle development helps to draw attention to particular field observations that can be used to assess the model, its assumptions and parameter choices, and to the considerable potential for synergetic field and modelling studies.

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Section: Freezing In Porous Media and Frost Heavingmentioning

confidence: 99%

Section: Freezing In Porous Media and Frost Heavingmentioning

confidence: 99%

Stone circles: form and soil kinematics

Hallet

2013

Phil. Trans. R. Soc. A.

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“…A pre-melted liquid water film around the soil particles caused by ice-particle interaction separates the ice from the soil particles, and the growth of the segregated ice increases due to these water films working as water supplying passages (Beskow 1935;Rempel 2007). Intermolecular forces across these thin water films create a fluid pressure gradient, causing the unfrozen water to be transported to the freezing zone (Rempel 2007(Rempel , 2010. The theoretical understanding of the mechanisms driving frost heaving is complex, and many incorrect theories have been postulated throughout the last century.…”

Section: Introductionmentioning

confidence: 99%

“…The theoretical understanding of the mechanisms driving frost heaving is complex, and many incorrect theories have been postulated throughout the last century. One of the most common misunderstandings is that capillary forces transport water from the water source to the freezing zone (Rempel 2010;Taber 1930). Because of ice segregation, bands of soil-free ice lenses are formed between layers consisting of a mixture of ice, particles and water (Rempel 2007).…”

Section: Introductionmentioning

confidence: 99%

Frost susceptibility of sub-base gravel used in Pearl-Chain Bridges: an experimental investigation

Lund

Hansen

Andersen

2016

International Journal of Pavement Engineering

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“…et du pin gris plantés sur des stations boréales, et ce, jusqu'à 19 ans. Les problèmes de déchaussement sont généralement plus importants sur sols à texture fine, en raison de l' effet du cycle de gel-dégel (Rempel 2010). La texture grossière du sol dans notre site d' étude pourrait donc expliquer la faible incidence de la profondeur sur la croissance.…”

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Effets à court terme du décapage de la matière organique sur la croissance et la nutrition d’épinettes noires et de pins gris mis en terre en forêt boréale

Thiffault¹

2016

The Forestry Chronicle

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Scarification contributes to creating planting microsites for reforestation by mixing organic matter (OM) with the upper layers of mineral soil. However, on some boreal sites characterized by a thick humus layer and dominated by ericaceous shrubs, competition seems to limit the benefits of scarification. A potential solution would be to remove OM completely through scalping. The objective of our study was to compare the short-term effects of scarification and scalping on the growth of Picea mariana and Pinus banksiana on such sites. After three growing seasons, we explored the relationships between seedling growth, groups of competing vegetation species, planting depth and distance to the nearest OM accumulation. The two treatments had similar effects on these variables. Growth on plots subjected to scalping was independent from the distance to OM. Planting depth had a nil or positive effect on seedling growth. Pinus seedlings largely outgrew Picea seedlings. However, the lack of short-term difference between scarification and scalping must be interpreted with caution, given the potential mid-and long-term effects of OM exportation on soil fertility, erosion and seedling nutrition.Key words : reforestation, plantation, site preparation, Picea mariana, Pinus banksiana 1 Direction de la recherche forestière, Ministère des Forêts, de la Faune et des Parcs du Québec, 2700, rue Einstein, Québec, QC, G1P 3W8, et Centre d' étude de la forêt, Université Laval, 2405, rue de la Terrasse, Québec, QC, G1V 0A6. Courriel : nelson.thiffault@mffp.gouv.qc.ca Nelson Thiffault matériel planté (l' essence, le type de plants, le génotype) et les conditions environnementales (Grossnickle 2012). Plus particulièrement, le microenvironnement des plants influence la quantité des ressources disponibles (température de l'air et du sol, éléments nutritifs, eau, lumière). Une disponibilité non optimale des ressources crée des stress qui mettent en péril le succès d' établissement des plants (Margolis and Brand 1990). Afin d' optimiser l'important investissement associé aux programmes d'amélioration génétique, à la production des plants forestiers et à leur mise en terre , il importe que les microsites de reboisement favorisent des réserves de ressources qui se rapprochent autant que possible des valeurs optimales (Burdett 1990).Toutefois, les caractéristiques précises des microsites de reboisement qui limitent les stress de plantation sont difficiles à cerner (quantité de débris ligneux, Devine and Harrington The Forestry Chronicle Downloaded from pubs.cif-ifc.org by 54.186.52.231 on 05/10/18For personal use only. 2016, VOL. 92, N o 2 -THE FORESTRY CHRONICLE 2112007; mélange organique/minéral, Salonius 1983; profondeur de mise en terre, Sutton 1995). De nombreuses études ont documenté les effets du scarifiage sur l' établissement des plantations en forêt boréale (p. ex. Prévost et Dumais 2003, Hébert et al. 2014, Henneb et al. 2015. D'autres se sont attardées à la gestion des débris de coupe et à leurs effets sur le microenvironneme...

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Frost heave

Cited by 72 publications

References 39 publications

Stone circles: form and soil kinematics

Stone circles: form and soil kinematics

Frost susceptibility of sub-base gravel used in Pearl-Chain Bridges: an experimental investigation

Effets à court terme du décapage de la matière organique sur la croissance et la nutrition d’épinettes noires et de pins gris mis en terre en forêt boréale

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