Pressure and inertia sensing drifters for glacial hydrology flow path measurements
Glacial hydrology plays an important role in the control of glacier dynamics, of sediment transport, and of fjord and proglacial ecosystems. Surface meltwater drains through glaciers via supraglacial, englacial and subglacial systems. Due to challenging field conditions, the processes driving surfac...
Published in: | The Cryosphere |
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Language: | English |
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Copernicus Publications under license by EGU – European Geosciences Union GmbH
2020
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Online Access: | http://hdl.handle.net/10852/78152 http://urn.nb.no/URN:NBN:no-81254 https://doi.org/10.5194/tc-14-1009-2020 |
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ftoslouniv:oai:www.duo.uio.no:10852/78152 2023-05-15T18:32:10+02:00 Pressure and inertia sensing drifters for glacial hydrology flow path measurements Alexander, Andreas Kruusmaa, Maarja Tuhtan, Jeffrey Hodson, Andrew Schuler, Thomas Kääb, Andreas 2020-03-17T16:09:55Z http://hdl.handle.net/10852/78152 http://urn.nb.no/URN:NBN:no-81254 https://doi.org/10.5194/tc-14-1009-2020 EN eng Copernicus Publications under license by EGU – European Geosciences Union GmbH http://urn.nb.no/URN:NBN:no-81254 Alexander, Andreas Kruusmaa, Maarja Tuhtan, Jeffrey Hodson, Andrew Schuler, Thomas Kääb, Andreas . Pressure and inertia sensing drifters for glacial hydrology flow path measurements. The Cryosphere. 2020, 14(3), 1009-1023 http://hdl.handle.net/10852/78152 1802096 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The Cryosphere&rft.volume=14&rft.spage=1009&rft.date=2020 The Cryosphere 14 3 1009 1023 https://doi.org/10.5194/tc-14-1009-2020 URN:NBN:no-81254 Fulltext https://www.duo.uio.no/bitstream/handle/10852/78152/4/tc-14-1009-2020.pdf Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 1994-0416 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2020 ftoslouniv https://doi.org/10.5194/tc-14-1009-2020 2020-08-05T22:29:42Z Glacial hydrology plays an important role in the control of glacier dynamics, of sediment transport, and of fjord and proglacial ecosystems. Surface meltwater drains through glaciers via supraglacial, englacial and subglacial systems. Due to challenging field conditions, the processes driving surface processes in glacial hydrology remain sparsely studied. Recently, sensing drifters have shown promise in river, coastal and oceanographic studies. However, practical experience with drifters in glacial hydrology remains limited. Before drifters can be used as general tools in glacial studies, it is necessary to quantify the variability of their measurements. To address this, we conducted repeated field experiments in a 450 m long supraglacial channel with small cylindrical drifters equipped with pressure, magnetometer, acceleration and rotation rate sensors and compared the results. The experiments (n=55) in the supraglacial channel show that the pressure sensors consistently yielded the most accurate data, where values remained within ±0.11 % of the total pressure time-averaged mean (95 % confidence interval). Magnetometer readings also exhibited low variability across deployments, maintaining readings within ±2.45 % of the time-averaged mean of the magnetometer magnitudes. Linear acceleration measurements were found to have a substantially higher variability of ±34.4 % of the time-averaged mean magnitude, and the calculated speeds remained within ±24.5 % of the time-averaged mean along the flow path. Furthermore, our results indicate that prominent shapes in the sensor records are likely to be linked to variations in channel morphology and the associated flow field. Our results show that multimodal drifters can be a useful tool for field measurements inside supraglacial channels. Future deployments of drifters into englacial and subglacial channels promise new opportunities for determining hydraulic and morphologic conditions from repeated measurements of such inaccessible environments. Article in Journal/Newspaper The Cryosphere Universitet i Oslo: Digitale utgivelser ved UiO (DUO) The Cryosphere 14 3 1009 1023 |
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Open Polar |
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Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
Glacial hydrology plays an important role in the control of glacier dynamics, of sediment transport, and of fjord and proglacial ecosystems. Surface meltwater drains through glaciers via supraglacial, englacial and subglacial systems. Due to challenging field conditions, the processes driving surface processes in glacial hydrology remain sparsely studied. Recently, sensing drifters have shown promise in river, coastal and oceanographic studies. However, practical experience with drifters in glacial hydrology remains limited. Before drifters can be used as general tools in glacial studies, it is necessary to quantify the variability of their measurements. To address this, we conducted repeated field experiments in a 450 m long supraglacial channel with small cylindrical drifters equipped with pressure, magnetometer, acceleration and rotation rate sensors and compared the results. The experiments (n=55) in the supraglacial channel show that the pressure sensors consistently yielded the most accurate data, where values remained within ±0.11 % of the total pressure time-averaged mean (95 % confidence interval). Magnetometer readings also exhibited low variability across deployments, maintaining readings within ±2.45 % of the time-averaged mean of the magnetometer magnitudes. Linear acceleration measurements were found to have a substantially higher variability of ±34.4 % of the time-averaged mean magnitude, and the calculated speeds remained within ±24.5 % of the time-averaged mean along the flow path. Furthermore, our results indicate that prominent shapes in the sensor records are likely to be linked to variations in channel morphology and the associated flow field. Our results show that multimodal drifters can be a useful tool for field measurements inside supraglacial channels. Future deployments of drifters into englacial and subglacial channels promise new opportunities for determining hydraulic and morphologic conditions from repeated measurements of such inaccessible environments. |
format |
Article in Journal/Newspaper |
author |
Alexander, Andreas Kruusmaa, Maarja Tuhtan, Jeffrey Hodson, Andrew Schuler, Thomas Kääb, Andreas |
spellingShingle |
Alexander, Andreas Kruusmaa, Maarja Tuhtan, Jeffrey Hodson, Andrew Schuler, Thomas Kääb, Andreas Pressure and inertia sensing drifters for glacial hydrology flow path measurements |
author_facet |
Alexander, Andreas Kruusmaa, Maarja Tuhtan, Jeffrey Hodson, Andrew Schuler, Thomas Kääb, Andreas |
author_sort |
Alexander, Andreas |
title |
Pressure and inertia sensing drifters for glacial hydrology flow path measurements |
title_short |
Pressure and inertia sensing drifters for glacial hydrology flow path measurements |
title_full |
Pressure and inertia sensing drifters for glacial hydrology flow path measurements |
title_fullStr |
Pressure and inertia sensing drifters for glacial hydrology flow path measurements |
title_full_unstemmed |
Pressure and inertia sensing drifters for glacial hydrology flow path measurements |
title_sort |
pressure and inertia sensing drifters for glacial hydrology flow path measurements |
publisher |
Copernicus Publications under license by EGU – European Geosciences Union GmbH |
publishDate |
2020 |
url |
http://hdl.handle.net/10852/78152 http://urn.nb.no/URN:NBN:no-81254 https://doi.org/10.5194/tc-14-1009-2020 |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
1994-0416 |
op_relation |
http://urn.nb.no/URN:NBN:no-81254 Alexander, Andreas Kruusmaa, Maarja Tuhtan, Jeffrey Hodson, Andrew Schuler, Thomas Kääb, Andreas . Pressure and inertia sensing drifters for glacial hydrology flow path measurements. The Cryosphere. 2020, 14(3), 1009-1023 http://hdl.handle.net/10852/78152 1802096 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The Cryosphere&rft.volume=14&rft.spage=1009&rft.date=2020 The Cryosphere 14 3 1009 1023 https://doi.org/10.5194/tc-14-1009-2020 URN:NBN:no-81254 Fulltext https://www.duo.uio.no/bitstream/handle/10852/78152/4/tc-14-1009-2020.pdf |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-14-1009-2020 |
container_title |
The Cryosphere |
container_volume |
14 |
container_issue |
3 |
container_start_page |
1009 |
op_container_end_page |
1023 |
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1766216221116596224 |