Modelling debris transport within glaciers by advection in a full-Stokes ice flow model
Glaciers with extensive surface debris cover respond differently to climate forcing than those without supraglacial debris. In order to include debris-covered glaciers in projections of glaciogenic runoff and sea level rise and to understand the paleoclimate proxy recorded by such glaciers, it is ne...
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ftdoajarticles:oai:doaj.org/article:e3fb7d817c034ce08482b808b518b499 2023-05-15T18:32:27+02:00 Modelling debris transport within glaciers by advection in a full-Stokes ice flow model A. Wirbel A. H. Jarosch L. Nicholson 2018-01-01T00:00:00Z https://doi.org/10.5194/tc-12-189-2018 https://doaj.org/article/e3fb7d817c034ce08482b808b518b499 EN eng Copernicus Publications https://www.the-cryosphere.net/12/189/2018/tc-12-189-2018.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-12-189-2018 1994-0416 1994-0424 https://doaj.org/article/e3fb7d817c034ce08482b808b518b499 The Cryosphere, Vol 12, Pp 189-204 (2018) Environmental sciences GE1-350 Geology QE1-996.5 article 2018 ftdoajarticles https://doi.org/10.5194/tc-12-189-2018 2022-12-30T23:20:10Z Glaciers with extensive surface debris cover respond differently to climate forcing than those without supraglacial debris. In order to include debris-covered glaciers in projections of glaciogenic runoff and sea level rise and to understand the paleoclimate proxy recorded by such glaciers, it is necessary to understand the manner and timescales over which a supraglacial debris cover develops. Because debris is delivered to the glacier by processes that are heterogeneous in space and time, and these debris inclusions are altered during englacial transport through the glacier system, correctly determining where, when and how much debris is delivered to the glacier surface requires knowledge of englacial transport pathways and deformation. To achieve this, we present a model of englacial debris transport in which we couple an advection scheme to a full-Stokes ice flow model. The model performs well in numerical benchmark tests, and we present both 2-D and 3-D glacier test cases that, for a set of prescribed debris inputs, reproduce the englacial features, deformation thereof and patterns of surface emergence predicted by theory and observations of structural glaciology. In a future step, coupling this model to (i) a debris-aware surface mass balance scheme and (ii) a supraglacial debris transport scheme will enable the co-evolution of debris cover and glacier geometry to be modelled. Article in Journal/Newspaper The Cryosphere Directory of Open Access Journals: DOAJ Articles The Cryosphere 12 1 189 204 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 A. Wirbel A. H. Jarosch L. Nicholson Modelling debris transport within glaciers by advection in a full-Stokes ice flow model |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Glaciers with extensive surface debris cover respond differently to climate forcing than those without supraglacial debris. In order to include debris-covered glaciers in projections of glaciogenic runoff and sea level rise and to understand the paleoclimate proxy recorded by such glaciers, it is necessary to understand the manner and timescales over which a supraglacial debris cover develops. Because debris is delivered to the glacier by processes that are heterogeneous in space and time, and these debris inclusions are altered during englacial transport through the glacier system, correctly determining where, when and how much debris is delivered to the glacier surface requires knowledge of englacial transport pathways and deformation. To achieve this, we present a model of englacial debris transport in which we couple an advection scheme to a full-Stokes ice flow model. The model performs well in numerical benchmark tests, and we present both 2-D and 3-D glacier test cases that, for a set of prescribed debris inputs, reproduce the englacial features, deformation thereof and patterns of surface emergence predicted by theory and observations of structural glaciology. In a future step, coupling this model to (i) a debris-aware surface mass balance scheme and (ii) a supraglacial debris transport scheme will enable the co-evolution of debris cover and glacier geometry to be modelled. |
format |
Article in Journal/Newspaper |
author |
A. Wirbel A. H. Jarosch L. Nicholson |
author_facet |
A. Wirbel A. H. Jarosch L. Nicholson |
author_sort |
A. Wirbel |
title |
Modelling debris transport within glaciers by advection in a full-Stokes ice flow model |
title_short |
Modelling debris transport within glaciers by advection in a full-Stokes ice flow model |
title_full |
Modelling debris transport within glaciers by advection in a full-Stokes ice flow model |
title_fullStr |
Modelling debris transport within glaciers by advection in a full-Stokes ice flow model |
title_full_unstemmed |
Modelling debris transport within glaciers by advection in a full-Stokes ice flow model |
title_sort |
modelling debris transport within glaciers by advection in a full-stokes ice flow model |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-12-189-2018 https://doaj.org/article/e3fb7d817c034ce08482b808b518b499 |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
The Cryosphere, Vol 12, Pp 189-204 (2018) |
op_relation |
https://www.the-cryosphere.net/12/189/2018/tc-12-189-2018.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-12-189-2018 1994-0416 1994-0424 https://doaj.org/article/e3fb7d817c034ce08482b808b518b499 |
op_doi |
https://doi.org/10.5194/tc-12-189-2018 |
container_title |
The Cryosphere |
container_volume |
12 |
container_issue |
1 |
container_start_page |
189 |
op_container_end_page |
204 |
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1766216569667452928 |