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- W3207634230 abstract "Alpine permafrost environments are highly vulnerable and sensitive to changesin regional and global climate trends. Thawing and degradation of permafrosthas numerous adverse environmental, economic, and societal impacts.Mathematical modeling and numerical simulations provide powerful tools forpredicting the degree of degradation and evolution of subsurface permafrost asa result of global warming. A particularly significant characteristic of alpineenvironments is the high variability in their topography and geomorphologywhich drives large lateral thermal and fluid fluxes. Additionally, harsh winds,extreme weather conditions, and various degrees of saturation have to beconsidered. The combination of large lateral fluxes and unsaturated groundmakes alpine systems markedly different from Arctic permafrost environments andgeneral geotechnical ground freezing applications, and therefore, alpinepermafrost demands its own specialized modeling approaches. In this researchwork, we present a multi-physics permafrost model tailored to alpine regions.In particular, we resolve the ice-water phase transitions, unsaturatedconditions, and capillary actions, and account for the impact of the evolvingpore volume on fluid-matrix interactions. Moreover, the approach ismulti-dimensional, and therefore, inherently resolves fluxes along topographicgradients. Through numerical cases studies based on the elevation profiles ofthe two prominent peaks of the Zugspitze (DE) and the Matterhorn (CH), we showthe strong influence of topography driven thermal and fluid fluxes on activelayer dynamics and the distribution of permafrost." @default.
- W3207634230 created "2021-10-25" @default.
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- W3207634230 date "2021-10-14" @default.
- W3207634230 modified "2023-09-27" @default.
- W3207634230 title "Alpine Permafrost Modeling: On the influence of topography driven lateral fluxes" @default.
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