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TitleRelationship of ground temperatures to air temperatures in forests
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorTaylor, A E
SourceThe physical environment of the Mackenzie Valley, Northwest Territories: a base line for the assessment of environmental change; by Dyke, L D (ed.); Brooks, G RORCID logo (ed.); Geological Survey of Canada, Bulletin 547, 2000 p. 111-117; 1 CD-ROM, Open Access logo Open Access
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LinksTéléchargement de la publication au complet
PublisherNatural Resources Canada
Mediapaper; CD-ROM; digital; on-line
RelatedThis publication is contained in The physical environment of the Mackenzie Valley, Northwest Territories: a base line for the assessment of environmental change
File formatbmp; pdf (Adobe Acrobat Reader v.6.0 is included / est fourni); txt; pdf
ProvinceNorthwest Territories
NTS85D; 85E; 95A; 95B; 95G; 95H; 95I; 95J; 95K; 95N; 95O; 96C; 96D; 96E; 96F; 106G; 106H; 106I; 106J; 106K; 106L; 106M; 106N; 106O; 106P; 107B; 107C
AreaMackenzie Valley
Lat/Long WENS-136.0000 -118.0000 70.0000 60.0000
Subjectssedimentology; surficial geology/geomorphology; climatic fluctuations; ground ice; temperature; ground temperatures; thermal regimes; permafrost; snow; vegetation; Forests; Quaternary
Illustrationssketch maps; cross-plots; graphs
Released2000 12 01
AbstractGround temperatures differ from air temperatures because of effects of vegetation and humus, other site characteristics, and snow cover. For engineering work, ground surface temperatures may be estimated from the more readily available air temperatures through the use of a single parameter, the n-factor, to represent these effects. In the Mackenzie valley, n-factors have been calculated from measurements of air and ground temperatures at 27 diverse, natural sites. Generally, the n-factor for the thawing (spring-summer) season is higher in more open areas than in shady forests with thick moss. At a particular site, the n-factor for the freezing (fall-winter) season is usually lower than the corresponding n-factor for the thaw season, because of the reduced impact of air temperatures and solar radiation on the ground due to snow cover. One application of n-factors is the calculation of the depth of soil that thaws each year, called the active layer.


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