Mots-clés
Alpes ; Eau de fonte ; Infiltration ; Manteau nival ; Modèle ; Mollisol ; Montagne ; Pergélisol ; Périglaciaire ; Suisse ; Température du solActive layer ; Alps (The) ; Infiltration ; Meltwater ; Model ; Mountain ; Periglacial features ; Permafrost ; Snow cover ; Soil temperature ; SwitzerlandAgua de deshielo ; Alpes ; Capa nival ; Infiltración ; Modelo ; Molisol ; Montaña ; Pergelisol ; Periglaciar ; Suiza ; Temperatura del sueloMeltwater infiltration into the frozen active layer at an alpine permafrost site
Auteur(s) et Affiliation(s)
SCHERLER, M.
Dep. of Geosciences, Univ., Fribourg, Suisse
HAUCK, C.
Dep. of Geosciences, Univ., Fribourg, Suisse
HOELZLE, M.
Dep. of Geosciences, Univ., Fribourg, Suisse
STÄHLI, M.
Swiss Federal Research Inst. WSL, Birmensdorf, Suisse
VÖLKSCH, I.
Swiss Federal Research Inst. WSL, Birmensdorf, Suisse
Description :
A coupled heat and mass transfer model simulating mass and energy balance of the soil-snow-atmosphere boundary layer was applied to simulate ground temperatures, together with water and ice content evolution, in the active layer of an alpine permafrost site on Schilthorn, Swiss Alps. Abrupt shifts and subsequent fluctuations in ground temperature observed in alpine permafrost boreholes at the beginning of the zero curtain phase in summer were explained by snowmelt and meltwater infiltration. Simulated water contents were compared to values derived from inverted electrical resistivity measurements and yielded a further independent validation of the model results. The study shows that infiltration into frozen soil takes place as an oscillating process in the model. This process is constrained by initial ground temperatures, infiltrability and the availability of meltwater from the snow cover.
Type de document :
Article de périodique
Source :
Permafrost and periglacial processes, issn : 1045-6740, 2010, vol. 21, n°. 4, p. 325-334, nombre de pages : 10, Références bibliographiques : 38 ref.
Date :
2010
Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)