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In 1978, a shallow permafrost and terrain analysis study was started at Canadian Forces Station Alert, N.W.T. (82"30'N, 62'26'W). Five holes, drilled to depths down to 60 m, were instrumented with multi-thermistor cables, and temperature measurements have been taken every two or...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.496.4512 http://pubs.aina.ucalgary.ca/cpc/cpc4-12.pdf |
| Summary: | In 1978, a shallow permafrost and terrain analysis study was started at Canadian Forces Station Alert, N.W.T. (82"30'N, 62'26'W). Five holes, drilled to depths down to 60 m, were instrumented with multi-thermistor cables, and temperature measurements have been taken every two or three weeks for the last three years by DND personnel. The drilling sites were chosen to cover various terrain types accessible from the Alert station. Pre-liminary air-photo analysis indicates that the principal landforms are of glacial and marine origin. A 60 m temperature cable (site l), installed within 100 m of a shore-line emerging due to glacial unload-ing, yields temperatures 4 to 5 K warmer than two similar cables installed on inland plateau sites (sites 2 and 3). An analysis of these three sites suggests the higher subsurface temperatures at the shore site result as much from its proximity to the sea as from the period of submergence prior to 3000 years ago. Temperature cables installed in two 15 m holes (sites 4 and 5) on gentle north- and south-facing slopes have shown that aspect has little influence on temperatures at this extreme latitude. Un projet pour Ctudier les caracteristiques du pergelis01 en surface et la gComorphologie des environs de la station des forces armees canadienne Alert, T.N.-0. (82'30'N, 62'26'W) a debut6 en 1978 par le forage de 5 trous dont certains ont une profondeur de 60 m. Le personnel du ministere de la Defense |
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