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(Article of periodic en Anglais - 2012)

Document title

Geometric evolution of polygonal terrain networks in the Canadian High Arctic : evidence of increasing regularity over time

Authors(s) and Affiliation(s)

HALTIGIN T.W. (1 2) ; POLLARD W.H. (1) ; DUTILLEUL P. (3) ; OSINKI G.R. (4) ;
(1) Dept. of Geography, McGill University, Montreal, CANADA
(2) Space Science & Technology, Canadian Space Agency, QC, St. Hubert, CANADA
(3) Dept. of Plant Science, McGill Univ., QC, Ste-Anne-de-Bellevue, CANADA
(4) Depts. of Earth Science/Physics and Astronomy, Univ. of Western Ontario, London, CANADA

Abstract

The aim of this study is to determine whether or not polygonal thermal-contraction-crack networks actually regularise as they evolve. Spatial point pattern analysis (SPPA), which can quantify overall network geometries based on the randomness or regularity exhibited by the spatial arrangement of polygon-bounding trough intersections, was used at 3 ice-wedge polygon sites in the Canadian High Arctic. SPPA was applied in 2 ways : (i) on the present-day networks observed in the field; and (ii) on historical arrangements derived by distinguishing primary from secondary troughs. In all cases, the polygonal networks had undergone a statistically significant regularisation over the course of their development. Although the method was applied only to terrestrial ice-wedge polygons, such an approach may also be useful for interpreting the evolution of Antarctic sublimation polygons and geometrically similar polygonal networks on Mars

Source

Article of periodic

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

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

Millesime : 2012, vol. 23, no3 [pp. 178-186]

Bibliographic references : 1 p.

Collation : 5 fig., 2 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.1741

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