Schultz, Timm ; Müller, Ralf ; Gross, Dietmar ; Humbert, Angelika (2021)
Modelling the Transformation from Snow to Ice Based on the Underlying Sintering Process.
In: PAMM — Proceedings in Applied Mathematics and Mechanics, 20 (1)
doi: 10.1002/pamm.202000212
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
In cold regions of the earth, like Antarctica, Greenland or mountains at high altitude, the annual amount of deposited snow exceeds the amount of snow melting. Snow, which is more than one year old, is called firn. Over time firn transforms into ice by a sintering process, mainly driven by overburden pressure and temperature. This ultimately leads to the formation of glaciers and ice sheets. We simulate firn densification based on the processes of sintering. The constitutive law represents grain boundary sliding, dislocation creep and diffusion. These mechanisms sum up to the overall densification which leads to the transformation of snow to ice. The model aims at obtaining a physics driven simulation tool for firn densification which provides data for a wider range of areas. It will contribute to develop better models and better understanding of the cryosphere.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Schultz, Timm ; Müller, Ralf ; Gross, Dietmar ; Humbert, Angelika |
| Art des Eintrags: | Bibliographie |
| Titel: | Modelling the Transformation from Snow to Ice Based on the Underlying Sintering Process |
| Sprache: | Englisch |
| Publikationsjahr: | 2021 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | PAMM — Proceedings in Applied Mathematics and Mechanics |
| Jahrgang/Volume einer Zeitschrift: | 20 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.1002/pamm.202000212 |
| URL / URN: | https://onlinelibrary.wiley.com/doi/pdf/10.1002/pamm.2020002... |
| Kurzbeschreibung (Abstract): | In cold regions of the earth, like Antarctica, Greenland or mountains at high altitude, the annual amount of deposited snow exceeds the amount of snow melting. Snow, which is more than one year old, is called firn. Over time firn transforms into ice by a sintering process, mainly driven by overburden pressure and temperature. This ultimately leads to the formation of glaciers and ice sheets. We simulate firn densification based on the processes of sintering. The constitutive law represents grain boundary sliding, dislocation creep and diffusion. These mechanisms sum up to the overall densification which leads to the transformation of snow to ice. The model aims at obtaining a physics driven simulation tool for firn densification which provides data for a wider range of areas. It will contribute to develop better models and better understanding of the cryosphere. |
| Zusätzliche Informationen: | Artikel Id: e202000212 |
| Fachbereich(e)/-gebiet(e): | 13 Fachbereich Bau- und Umweltingenieurwissenschaften 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Fachgebiete der Mechanik 13 Fachbereich Bau- und Umweltingenieurwissenschaften > Fachgebiete der Mechanik > Fachgebiet Kontinuumsmechanik |
| Hinterlegungsdatum: | 20 Jan 2022 07:11 |
| Letzte Änderung: | 04 Mai 2022 09:40 |
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