Some observations on the influence of climatic and terrain features on Permafrost at Norman Wells, N.W.T., Canada

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DOIResolve DOI: http://doi.org/10.1139/e65-003
AuthorSearch for:
TypeArticle
Journal titleCanadian Journal of Earth Sciences
ISSN0008-4077
Volume2
Pages1531; # of pages: 17
SubjectPermafrost; Soils
AbstractDuring the summer of 1959 and 1960, field observations of the influence of some climatic and terrain features on permafrost were carried out at Norman Wells, N.W.T. Five sites all underlain by perennially frozen ground, were selected for investigation. One site was a Thornthwaite potential evapotranspiration site with a vegetation cover of Kentucky bluegrass gowing on clayey site.The four remaining sites included the various types of vegetation growing naturally in the Korman Wells region. The tree growth was predominantly spruce with some tamarack. Spl~agnlrnt and other mosses, lichen, and sedge comprised the ground cover. The peat layer varied in thickness from 7 in. to 2 ft and the mineral soil was predominantly clayey silt. At each site, measurements were taken of evaporation (including potential evapotrar~spiratior~n)e, tradiation at the ground surface, depth of thaw, and ground temperatures inthe thawed layer and the permafrost. Although field conditions dictated the use of crude measuring devices, some quantitative information was obtained on the relative importance of these climatic and terrain features in the permafrost environment. Potential evapotranspiration was higher in the Kentucky bluegrassat the Thornthwaite site than in Sphagnum and in other mosses, in lichen, and in sedge at the other sites. Net radiation values appeared to be slightly higher for moss than for lichen. The depth of thaw under moss and lichen was less than In areas supporting other types of plant growth. Ground temperatures in thethawed layer and in the permafrost showed the same characteristics, being lower in the moss and lichen areas
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
IdentifierDBR-RP-236
NRC number8213
1123
NPARC number20386321
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Record identifier83990133-6212-4797-a58c-42c79811818e
Record created2012-07-25
Record modified2016-05-09
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