Modeling saline fluid flow in subglacial ice-walled channels
Subglacial hydrological systems have impacts on ice dynamics as well as nutrient and sediment transport. There has been an extensive effort to understand the dynamics of subglacial drainage through numerical modeling, however these models have focused on freshwater, neglecting the consideration of b...
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Montana State University - Bozeman, College of Letters & Science
2022
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ftmontanastateu:oai:scholarworks.montana.edu:1/18210 2024-02-04T09:59:39+01:00 Modeling saline fluid flow in subglacial ice-walled channels Jenson, Amy Jo Chairperson, Graduate Committee: Scott McCalla 2022 application/pdf https://scholarworks.montana.edu/xmlui/handle/1/18210 en eng Montana State University - Bozeman, College of Letters & Science https://scholarworks.montana.edu/xmlui/handle/1/18210 Copyright 2022 by Amy Jo Jenson Glaciers Saline waters Hydrology Mathematical models Thesis 2022 ftmontanastateu 2024-01-06T23:41:21Z Subglacial hydrological systems have impacts on ice dynamics as well as nutrient and sediment transport. There has been an extensive effort to understand the dynamics of subglacial drainage through numerical modeling, however these models have focused on freshwater, neglecting the consideration of brine. Saline fluid can exist in cold-based glacier systems where freshwater cannot. Therefore, there exist subglacial hydrological systems where the only fluid is brine. Understanding the routing of saline fluid is important for understanding geochemical and microbiological processes in these saline cryospheric habitats. In this thesis, I present a model of channelized drainage from a hypersaline subglacial lake and highlight the impact of saline fluid on melt rates in an ice-walled channel. The model results show that channel walls grow more quickly when fluid contains higher salt concentrations, which results in greater peak discharge and faster drainage for a fixed lake volume. This model provides a framework to assess the relative impact of brine on discharge and drainage duration. Thesis Cold-based glacier Montana State University (MSU): ScholarWorks |
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Montana State University (MSU): ScholarWorks |
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ftmontanastateu |
language |
English |
topic |
Glaciers Saline waters Hydrology Mathematical models |
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Glaciers Saline waters Hydrology Mathematical models Jenson, Amy Jo Modeling saline fluid flow in subglacial ice-walled channels |
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Glaciers Saline waters Hydrology Mathematical models |
description |
Subglacial hydrological systems have impacts on ice dynamics as well as nutrient and sediment transport. There has been an extensive effort to understand the dynamics of subglacial drainage through numerical modeling, however these models have focused on freshwater, neglecting the consideration of brine. Saline fluid can exist in cold-based glacier systems where freshwater cannot. Therefore, there exist subglacial hydrological systems where the only fluid is brine. Understanding the routing of saline fluid is important for understanding geochemical and microbiological processes in these saline cryospheric habitats. In this thesis, I present a model of channelized drainage from a hypersaline subglacial lake and highlight the impact of saline fluid on melt rates in an ice-walled channel. The model results show that channel walls grow more quickly when fluid contains higher salt concentrations, which results in greater peak discharge and faster drainage for a fixed lake volume. This model provides a framework to assess the relative impact of brine on discharge and drainage duration. |
author2 |
Chairperson, Graduate Committee: Scott McCalla |
format |
Thesis |
author |
Jenson, Amy Jo |
author_facet |
Jenson, Amy Jo |
author_sort |
Jenson, Amy Jo |
title |
Modeling saline fluid flow in subglacial ice-walled channels |
title_short |
Modeling saline fluid flow in subglacial ice-walled channels |
title_full |
Modeling saline fluid flow in subglacial ice-walled channels |
title_fullStr |
Modeling saline fluid flow in subglacial ice-walled channels |
title_full_unstemmed |
Modeling saline fluid flow in subglacial ice-walled channels |
title_sort |
modeling saline fluid flow in subglacial ice-walled channels |
publisher |
Montana State University - Bozeman, College of Letters & Science |
publishDate |
2022 |
url |
https://scholarworks.montana.edu/xmlui/handle/1/18210 |
genre |
Cold-based glacier |
genre_facet |
Cold-based glacier |
op_relation |
https://scholarworks.montana.edu/xmlui/handle/1/18210 |
op_rights |
Copyright 2022 by Amy Jo Jenson |
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1789964582024904704 |