| Titre | Quantifying surface temperature inversions and their impact on the ground thermal regime at a high Arctic site |
| Auteur | Smith, S L; Bonnaventure, P P |
| Source | Permafrost 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 (Accès ouvert) |
| Année | 2017 |
| Séries alt. | Secteur des sciences de la Terre, Contribution externe 20100445 |
| Éditeur | Institute of Arctic and Alpine Research (INSTAAR) |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1657/AAAR0016-039 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Province | Nunavut |
| SNRC | 120E/05; 120E/06; 120E/12; 120E/11 |
| Région | Alert |
| Lat/Long OENS | -62.5167 -62.4833 82.5167 82.4833 |
| Sujets | températures au sol; collectes des données; pergélisol; regimes thermiques; milieu côtièr; Nature et environnement |
| Illustrations | cartes de localisation; tableaux; graphiques; histogrammes |
| Programme | Géosciences de changements climatiques, Les sciences de la Terre à l'appui de la caractérisation, à l'échelle nationale, des impacts des changements climatiques sur la masse continentale
canadienne |
| Diffusé | 2018 01 05 |
| 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 ID | 287931 |
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