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(Article of periodic en Anglais - 2013)

Document title

Ice- and soil-wedge dynamics in the Kapp Linné Area, Svalbard, investigated by two- and three-dimensional GPR and ground thermal and acceleration regimes

Authors(s) and Affiliation(s)

WATANABE T. (1 2) ; MATSUOKA N. (3) ; CHRISTIANSEN H.H. (2) ;
(1) Graduate School of Life and Environmental Sciences, Univ., Tsukuba, JAPON
(2) Dept. of Geology, The Univ. Centre in Svalbard, Longyearbyen, NORVEGE
(3) Fac. of Life and Environmental Sciences, Univ., Tsukuba, JAPON

Abstract

GPR is applied to image subsurface structures below non-sorted polygons in Kapp Linné, Svalbard, where ice and active-layer soil wedges co-exist within a small area. Two-dimensional GPR images ice wedges as hyperbolic reflections extending down from the frost table. However, some ice-wedge signals are obscured or masked by similar hyperbolic reflections produced by stones or active-layer soil wedges. Three-dimensional GPR images ice wedges as linear amplitude anomalies, which excludes the possibility of misinterpretation and offers more reliable results. GPR investigations show that ice wedges are distributed sporadically in lower (younger) beach ridges, but not in higher (older) ones. Inter-site monitoring of ground temperature, soil moisture, slow ground deformation and cracking during 2004–09 and the determination of near-surface soil texture and stratigraphy suggest that snow cover and soil thermal properties determine the distribution of ice wedges

Source

Article of periodic

published at : Permafrost and periglacial processes / ISSN 1045-6740 / CODEN PEPPED

Editor : Wiley, Chichester - ROYAUME-UNI (1990)

Millesime : 2013, vol. 24, no1 [pp. 39-55]

Bibliographic references : 2 p.

Collation : 9 fig., 3 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.1767

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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