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TitreSimplified climate statistics for permafrost modeling: Yellowknife case study
AuteurRiseborough, D; Wolfe, S; Duchesne, C
SourceProceedings of the Tenth International Conference on Permafrost; 2012 p. 335-340
Séries alt.Secteur des sciences de la Terre, Contribution externe 20110342
RéunionTenth International Conference on Permafrost; Salekhard; RU; juin 25-29, 2012
ProvinceTerritoires du Nord-Ouest
Lat/Long OENS-115.0000 -114.5000 62.5000 62.2500
Sujetspergélisol; congélation du sol; glace fossile; températures au sol; modèles; climat; climat arctique; temperature; neige; Changement climatique; géologie des dépôts meubles/géomorphologie; Cénozoïque
Illustrationsplots; graphs; histograms; tables
ProgrammeGestionn aire de programme - sciences de changements climatiques, Géosciences de changements climatiques
Résumé(disponible en anglais seulement)
Climate variables were examined to evaluate their simplification for use in permafrost models, using data for Yellowknife Northwest Territories, Canada, as an example. Results suggest that conversion of the annual temperature cycle to a sine wave is an acceptable approximation, as long as the wave retains the correct values for the annual freezing and thawing degree-day totals. Evolution of the annual snow cover can be approximated by a parabolic accumulation function; the delay of snow cover initiation with respect to the start of the freezing season, the snow accumulation function, and snow density are all critical, while end-of-season snowpack evolution is of secondary importance.