Fluid resonance in elastic-walled englacial transport networks
Abstract Englacial water transport is an integral part of the glacial hydrologic system, yet the geometry of englacial structures remains largely unknown. In this study, we explore the excitation of fluid resonance by small amplitude waves as a probe of englacial geometry. We model a hydraulic netwo...
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crcambridgeupr:10.1017/jog.2021.48 2024-04-28T08:26:45+00:00 Fluid resonance in elastic-walled englacial transport networks McQuillan, Maria Karlstrom, Leif 2021 http://dx.doi.org/10.1017/jog.2021.48 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143021000484 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by-nc-sa/4.0/ Journal of Glaciology volume 67, issue 266, page 999-1012 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 2021 crcambridgeupr https://doi.org/10.1017/jog.2021.48 2024-04-09T06:55:15Z Abstract Englacial water transport is an integral part of the glacial hydrologic system, yet the geometry of englacial structures remains largely unknown. In this study, we explore the excitation of fluid resonance by small amplitude waves as a probe of englacial geometry. We model a hydraulic network consisting of one or more tabular cracks that intersect a cylindrical conduit, subject to oscillatory wave motion initiated at the water surface. Resulting resonant frequencies and quality factors are diagnostic of fluid properties and geometry of the englacial system. For a single crack–conduit system, the fundamental mode involves gravity-driven fluid sloshing between the conduit and the crack, at frequencies between 0.02 and 10 Hz for typical glacial parameters. Higher frequency modes include dispersive Krauklis waves generated within the crack and tube waves in the conduit. But we find that crack lengths are often well constrained by fundamental mode frequency and damping rate alone for settings that include alpine glaciers and ice sheets. Branching crack geometry and dip, ice thickness and source excitation function help define limits of crack detectability for this mode. In general, we suggest that identification of eigenmodes associated with wave motion in time series data may provide a pathway toward inferring englacial hydrologic structures. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 1 14 |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
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Earth-Surface Processes McQuillan, Maria Karlstrom, Leif Fluid resonance in elastic-walled englacial transport networks |
topic_facet |
Earth-Surface Processes |
description |
Abstract Englacial water transport is an integral part of the glacial hydrologic system, yet the geometry of englacial structures remains largely unknown. In this study, we explore the excitation of fluid resonance by small amplitude waves as a probe of englacial geometry. We model a hydraulic network consisting of one or more tabular cracks that intersect a cylindrical conduit, subject to oscillatory wave motion initiated at the water surface. Resulting resonant frequencies and quality factors are diagnostic of fluid properties and geometry of the englacial system. For a single crack–conduit system, the fundamental mode involves gravity-driven fluid sloshing between the conduit and the crack, at frequencies between 0.02 and 10 Hz for typical glacial parameters. Higher frequency modes include dispersive Krauklis waves generated within the crack and tube waves in the conduit. But we find that crack lengths are often well constrained by fundamental mode frequency and damping rate alone for settings that include alpine glaciers and ice sheets. Branching crack geometry and dip, ice thickness and source excitation function help define limits of crack detectability for this mode. In general, we suggest that identification of eigenmodes associated with wave motion in time series data may provide a pathway toward inferring englacial hydrologic structures. |
format |
Article in Journal/Newspaper |
author |
McQuillan, Maria Karlstrom, Leif |
author_facet |
McQuillan, Maria Karlstrom, Leif |
author_sort |
McQuillan, Maria |
title |
Fluid resonance in elastic-walled englacial transport networks |
title_short |
Fluid resonance in elastic-walled englacial transport networks |
title_full |
Fluid resonance in elastic-walled englacial transport networks |
title_fullStr |
Fluid resonance in elastic-walled englacial transport networks |
title_full_unstemmed |
Fluid resonance in elastic-walled englacial transport networks |
title_sort |
fluid resonance in elastic-walled englacial transport networks |
publisher |
Cambridge University Press (CUP) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1017/jog.2021.48 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143021000484 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 67, issue 266, page 999-1012 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by-nc-sa/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2021.48 |
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Journal of Glaciology |
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1 |
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14 |
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1797585999816032256 |