Towards a TTOP ground temperature model for mountainous terrain in Central-Eastern Norway

Auteurs :
JULIUSSEN, H.
HUMLUM, O.

Description :
The TTOP-model uses seasonal n-factors (nt and nf) and air temperature to model the mean annual ground-surface temperature (MAGST), and a ratio of thawed to frozen thermal conductivity to model the average TTOP. This study presents 28 and 36 values of nt and nf, respectively. The potential incoming solar radiation, derived in Geographical Information System (GIS), was used to parameterise nt, and average snow depth was used to parameterise nf. Due to limited information on the subsurface component of the model, only MAGST was modelled. The model was run for the 1961-90 normal period, the Little Ice Age and the year 2050. Finally, critical values that constrain negative MAGST and thus permafrost were determined.


Type de document :
Article de périodique

Source :
Permafrost and periglacial processes, issn : 1045-6740, 2007, vol. 18, n°. 2, p. 161-184, nombre de pages : 24, Collation : Illustration, Références bibliographiques : 66 ref.

Date :
2007

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley