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TitreQuantifying surface temperature inversions and their impact on the ground thermal regime at a high Arctic site
AuteurSmith, S L; Bonnaventure, P P
SourcePermafrost and Periglacial Processes - short communication; Arctic, Antarctic and Alpine Research vol. 49, no. 1, 2017 p. 173-185, https://doi.org/10.1657/AAAR0016-039
Année2017
Séries alt.Secteur des sciences de la Terre, Contribution externe 20100445
ÉditeurRegents of the University of Colorado
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1657/AAAR0016-039
Mediapapier; en ligne; numérique
Formatspdf
ProvinceNunavut
SNRC120E/05; 120E/06; 120E/12; 120E/11
Lat/Long OENS -62.5167 -62.4833 82.5167 82.4833
Sujetstempératures au sol; collectes des données; pergélisol; regimes thermiques; milieu côtièr
Illustrationslocation maps; tables; graphs; histograms; sterograms
ProgrammeLes sciences de la Terre à l'appui de la caractérisation, à l'échelle nationale, des impacts des changements climatiques sur la masse continentale canadienne, Géosciences de changements climatiques
Résumé(disponible en anglais seulement)
Air and ground temperature data collected at Canadian Forces Station Alert, Nunavut, Canada, have been analyzed to investigate the potential role that air temperature inversions play in influencing the spatial variation of permafrost thermal conditions in coastal areas of the High Arctic. Frequent, persistent air temperature inversions have been documented using a series of weather stations deployed along an elevation gradient inland from the coast. During inversion periods, which may last several days, air temperatures in valley bottoms can be up to 10 °C lower than adjacent stations located at elevations 47 to 130 m higher. The occurrence of air temperature inversions during the winter combined with thin snow cover suggest a mechanism explaining the observation of lower winter ground-surface temperatures and colder permafrost conditions in valley bottoms compared to higher elevations.
GEOSCAN ID287931