Terrain Controls and Landscape-Scale Susceptibility Modelling of Active-Layer Detachments, Sabine Peninsula, Melville Island, Nunavut

Modelling the susceptibility of permafrost slopes to disturbance can identify areas at risk to future disturbance and result in safer infrastructure and resource development in the Arctic. In this study, we use terrain attributes derived from a digital elevation model, an inventory of permafrost slope disturbances known as active-layer detachments (ALDs) and generalised additive modelling to produce a map of permafrost slope disturbance susceptibility for an area on northern Melville Island, in the Canadian High Arctic. By examining terrain variables and their relative importance, we identified factors important for initiating slope disturbance. The model was calibrated and validated using 70 and 30 per cent of a data-set of 760 mapped ALDs, including disturbed and randomised undisturbed samples. The generalised additive model calibrated and validated very well, with areas under the receiver operating characteristic curve of 0.89 and 0.81, respectively, demonstrating its effectiveness at predicting disturbed and undisturbed samples. ALDs were most likely to occur below the marine limit on slope angles between 3 and 10° and in areas with low values of potential incoming solar radiation (north-facing slopes).

The fate and effect of crude oil spilled on subarctic permafrost terrain in interior Alaska /

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Consumer Product Safety Commission: concerns about CPSC's all-terrain vehicle task force report.

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Consumer Product Safety Commission : concerns about staff memorandum relating to all-terrain vehicles.

"November 1986."

Controlled flight into terrain, Korean Air flight 801, Boeing 747-300, HL7468, Nimitz Hill, Guam, August 6, 1997 /

"DCA97MA058"--Cover.

Mémoires explicatifs des objets contenus dans la première et seconde distribution générale du terrain du Château-Trompette.

Imprint from colophon on p. 20.

Photo interpretation of the terrain along the southern part of the Alaska Highway : An application of the combined knowledge and techniques of botany and geology to the phot interpretation of terrain in northern regions /

Folded plates, maps, and table in pocket.

Le vrai pain de France; ou, La question du pain sur le terrain pratique par le dr. Monteuuis ...

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Traité du faux polychreste pour faire connoistr combien il différe de celuy qu'ont inventé Iean Seignette,... & Elie Seignette, son frére /

Traité du faux polychreste pour faire connoistr combien il différe de celuy qu'ont inventé Iean Seignette,... & Elie Seignette, son frére par Elie Seignette ... ; Les utilitez les plus remarquables de la poudre polychreste des sieurs Seignettes de la Rochelle ... ; Apologie pour le sel polychreste de monsieur Seignette ... par un médecin des-intéressé

Traitte des fausses couches : enseignant la nature des faux germes, embryons auortons & moles ... /

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Preservatif contre la charlatanerie des faux medecins /

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De l'esprit prophétique : traité dans lequel on examine la nature de cet esprit ... avec quelques réflexions sur les prophetes d'un ordre inférieur, & sur les faux-prophetes.

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Le veritable Vauban se montrant au lieu du faux Vauban, qui a couru jusqu'ici par le monde, & enseignant par le moien d'une arithmetique & d'une geometrie courte, & aisée, non seulement les régles pour tracer proprement cette maniere célebre de fortifier ... /

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HARPA : a versatile three-dimensional Hamiltonian ray-tracing program for acoustic waves in the atmosphere above irregular terrain /

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