Morphology, flow dynamics and evolution of englacial conduits in cold ice
Meltwater routing through ice masses exerts a fundamental control over glacier dynamics and mass balance, and proglacial hydrology. However, despite recent advances in mapping drainage systems in cold, Arctic glaciers, direct observations of englacial channels and their flow conditions remain sparse...
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Wiley-Blackwell Publishing, Inc.
2023
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ftunivzuerich:oai:www.zora.uzh.ch:225030 2024-09-30T14:30:40+00:00 Morphology, flow dynamics and evolution of englacial conduits in cold ice Kamintzis, J E Irvine‐Fynn, T D L Holt, T O Jones, J P P Porter, P R Jennings, S J A Naegeli, Kathrin Hubbard, B 2023-02-01 application/pdf https://www.zora.uzh.ch/id/eprint/225030/ https://www.zora.uzh.ch/id/eprint/225030/9/ZORA225030.pdf https://doi.org/10.5167/uzh-225030 https://doi.org/10.1002/esp.5494 eng eng Wiley-Blackwell Publishing, Inc. https://www.zora.uzh.ch/id/eprint/225030/9/ZORA225030.pdf doi:10.5167/uzh-225030 doi:10.1002/esp.5494 urn:issn:1096-9837 info:eu-repo/semantics/openAccess Creative Commons: Attribution 4.0 International (CC BY 4.0) http://creativecommons.org/licenses/by/4.0/ Kamintzis, J E; Irvine‐Fynn, T D L; Holt, T O; Jones, J P P; Porter, P R; Jennings, S J A; Naegeli, Kathrin; Hubbard, B (2023). Morphology, flow dynamics and evolution of englacial conduits in cold ice. Earth Surface Processes and Landforms, 48(2):415-432. Institute of Geography 910 Geography & travel Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Geography Planning and Development Journal Article PeerReviewed info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2023 ftunivzuerich https://doi.org/10.5167/uzh-22503010.1002/esp.5494 2024-09-04T00:39:07Z Meltwater routing through ice masses exerts a fundamental control over glacier dynamics and mass balance, and proglacial hydrology. However, despite recent advances in mapping drainage systems in cold, Arctic glaciers, direct observations of englacial channels and their flow conditions remain sparse. Here, using Terrestrial Laser Scanning (TLS) surveys of the main englacial channel of cold-based Austre Brøggerbreen (Svalbard), we map and compare an entrance moulin reach (122 m long) and exit portal reach (273 m long). Analysis of channel planforms, longitudinal profiles, cross-sections and morphological features reveals evidence of spatial variations in water flow conditions and channel incision mechanisms, and the presence of vadose, epiphreatic and phreatic conditions. The entrance reach, located at the base of a perennial moulin, was characterised by vadose, uniform, channel lowering at annual timescales, evidenced by longitudinal grooves, whereas the exit portal reach showed both epiphreatic and vadose conditions, along with upstream knickpoint migration at intra-annual timescales. Fine-scale features, including grooves and scallops, were readily quantified from the TLS point cloud, highlighting the capacity of the technique to inform palaeoflow conditions, and reveal how pulses of meltwater from rainfall events may adjust englacial conduit behaviour. With forecasts of increasing Arctic precipitation in the coming decades, and a progressively greater proportion of glaciers comprising cold ice, augmenting the current knowledge of englacial channel morphology is essential to constrain future glacier hydrological system change. Article in Journal/Newspaper Arctic glacier Svalbard University of Zurich (UZH): ZORA (Zurich Open Repository and Archive Arctic Svalbard |
institution |
Open Polar |
collection |
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
op_collection_id |
ftunivzuerich |
language |
English |
topic |
Institute of Geography 910 Geography & travel Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Geography Planning and Development |
spellingShingle |
Institute of Geography 910 Geography & travel Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Geography Planning and Development Kamintzis, J E Irvine‐Fynn, T D L Holt, T O Jones, J P P Porter, P R Jennings, S J A Naegeli, Kathrin Hubbard, B Morphology, flow dynamics and evolution of englacial conduits in cold ice |
topic_facet |
Institute of Geography 910 Geography & travel Earth and Planetary Sciences (miscellaneous) Earth-Surface Processes Geography Planning and Development |
description |
Meltwater routing through ice masses exerts a fundamental control over glacier dynamics and mass balance, and proglacial hydrology. However, despite recent advances in mapping drainage systems in cold, Arctic glaciers, direct observations of englacial channels and their flow conditions remain sparse. Here, using Terrestrial Laser Scanning (TLS) surveys of the main englacial channel of cold-based Austre Brøggerbreen (Svalbard), we map and compare an entrance moulin reach (122 m long) and exit portal reach (273 m long). Analysis of channel planforms, longitudinal profiles, cross-sections and morphological features reveals evidence of spatial variations in water flow conditions and channel incision mechanisms, and the presence of vadose, epiphreatic and phreatic conditions. The entrance reach, located at the base of a perennial moulin, was characterised by vadose, uniform, channel lowering at annual timescales, evidenced by longitudinal grooves, whereas the exit portal reach showed both epiphreatic and vadose conditions, along with upstream knickpoint migration at intra-annual timescales. Fine-scale features, including grooves and scallops, were readily quantified from the TLS point cloud, highlighting the capacity of the technique to inform palaeoflow conditions, and reveal how pulses of meltwater from rainfall events may adjust englacial conduit behaviour. With forecasts of increasing Arctic precipitation in the coming decades, and a progressively greater proportion of glaciers comprising cold ice, augmenting the current knowledge of englacial channel morphology is essential to constrain future glacier hydrological system change. |
format |
Article in Journal/Newspaper |
author |
Kamintzis, J E Irvine‐Fynn, T D L Holt, T O Jones, J P P Porter, P R Jennings, S J A Naegeli, Kathrin Hubbard, B |
author_facet |
Kamintzis, J E Irvine‐Fynn, T D L Holt, T O Jones, J P P Porter, P R Jennings, S J A Naegeli, Kathrin Hubbard, B |
author_sort |
Kamintzis, J E |
title |
Morphology, flow dynamics and evolution of englacial conduits in cold ice |
title_short |
Morphology, flow dynamics and evolution of englacial conduits in cold ice |
title_full |
Morphology, flow dynamics and evolution of englacial conduits in cold ice |
title_fullStr |
Morphology, flow dynamics and evolution of englacial conduits in cold ice |
title_full_unstemmed |
Morphology, flow dynamics and evolution of englacial conduits in cold ice |
title_sort |
morphology, flow dynamics and evolution of englacial conduits in cold ice |
publisher |
Wiley-Blackwell Publishing, Inc. |
publishDate |
2023 |
url |
https://www.zora.uzh.ch/id/eprint/225030/ https://www.zora.uzh.ch/id/eprint/225030/9/ZORA225030.pdf https://doi.org/10.5167/uzh-225030 https://doi.org/10.1002/esp.5494 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic glacier Svalbard |
genre_facet |
Arctic glacier Svalbard |
op_source |
Kamintzis, J E; Irvine‐Fynn, T D L; Holt, T O; Jones, J P P; Porter, P R; Jennings, S J A; Naegeli, Kathrin; Hubbard, B (2023). Morphology, flow dynamics and evolution of englacial conduits in cold ice. Earth Surface Processes and Landforms, 48(2):415-432. |
op_relation |
https://www.zora.uzh.ch/id/eprint/225030/9/ZORA225030.pdf doi:10.5167/uzh-225030 doi:10.1002/esp.5494 urn:issn:1096-9837 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons: Attribution 4.0 International (CC BY 4.0) http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.5167/uzh-22503010.1002/esp.5494 |
_version_ |
1811635512370266112 |