Simulating the effect of subsurface drainage on the thermal regime and ground ice in blocky terrain in Norway
Abstract ∘ C. For this scenario, the model can in particular simulate the time evolution of ground ice, with build-up during and after snowmelt and spring and gradual lowering of the ice table in the course of the summer season. The thermal anomaly increases with larger amounts of snowfall, showing that well-drained blocky deposits are less sensitive to insulation by snow than other soils. We simulate stable permafrost conditions at the location of a rock glacier in northern Norway with a mean annual ground surface temperature of 2.0–2.5 ∘ C in the blocks only, drained simulations. Finally, transient simulations since 1951 at the rock glacier site (starting with permafrost conditions for all stratigraphies) showed a complete loss of perennial ground ice in the upper 5 m of the ground in the blocks with sediment, drained run; a 1.6 m lowering of the ground ice table in the sediment only, drained run; and only 0.1 m lowering in the blocks only, drained run. The interplay between the subsurface water–ice balance and ground freezing/thawing driven by heat conduction can at least partly explain the occurrence of permafrost in coarse blocky terrain below the elevational limit of permafrost in non-blocky sediments. It is thus important to consider the subsurface water–ice balance in blocky terrain in future efforts in permafrost distribution mapping in mountainous areas. Furthermore, an accurate prediction of the evolution of the ground ice table in a future climate can have implications for slope stability, as well as water resources in arid environments.
- Standort
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Deutsche Nationalbibliothek Frankfurt am Main
- Umfang
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Online-Ressource
- Sprache
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Englisch
- Erschienen in
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Simulating the effect of subsurface drainage on the thermal regime and ground ice in blocky terrain in Norway ; volume:11 ; number:1 ; year:2023 ; pages:33-50 ; extent:18
Earth surface dynamics ; 11, Heft 1 (2023), 33-50 (gesamt 18)
- Urheber
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Renette, Cas
Aalstad, Kristoffer
Aga, Juditha
Zweigel, Robin Benjamin
Etzelmüller, Bernd
Lilleøren, Karianne Staalesen
Isaksen, Ketil
Westermann, Sebastian
- DOI
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10.5194/esurf-11-33-2023
- URN
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urn:nbn:de:101:1-2023033007564195231992
- Rechteinformation
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
- 14.08.2025, 08:50 UTC
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Beteiligte
- Renette, Cas
- Aalstad, Kristoffer
- Aga, Juditha
- Zweigel, Robin Benjamin
- Etzelmüller, Bernd
- Lilleøren, Karianne Staalesen
- Isaksen, Ketil
- Westermann, Sebastian
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