Assessing the applicability of terrestrial laser scanning for mapping englacial conduits
ABSTRACT The morphology of englacial drainage networks and their temporal evolution are poorly characterised, particularly within cold ice masses. At present, direct observations of englacial channels are restricted in both spatial and temporal resolution. Through novel use of a terrestrial laser sc...
Published in: | Journal of Glaciology |
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Language: | English |
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Cambridge University Press (CUP)
2017
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Online Access: | http://dx.doi.org/10.1017/jog.2017.81 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143017000818 |
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crcambridgeupr:10.1017/jog.2017.81 2024-06-23T07:53:05+00:00 Assessing the applicability of terrestrial laser scanning for mapping englacial conduits KAMINTZIS, J. E. JONES, J. P. P. IRVINE-FYNN, T. D. L. HOLT, T. O. BUNTING, P. JENNINGS, S. J. A. PORTER, P. R. HUBBARD, B. 2017 http://dx.doi.org/10.1017/jog.2017.81 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143017000818 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by-nc-sa/4.0/ Journal of Glaciology volume 64, issue 243, page 37-48 ISSN 0022-1430 1727-5652 journal-article 2017 crcambridgeupr https://doi.org/10.1017/jog.2017.81 2024-06-12T04:04:25Z ABSTRACT The morphology of englacial drainage networks and their temporal evolution are poorly characterised, particularly within cold ice masses. At present, direct observations of englacial channels are restricted in both spatial and temporal resolution. Through novel use of a terrestrial laser scanning (TLS) system, the interior geometry of an englacial channel in Austre Brøggerbreen, Svalbard, was reconstructed and mapped. Twenty-eight laser scan surveys were conducted in March 2016, capturing the glacier surface around a moulin entrance and the uppermost 122 m reach of the adjoining conduit. The resulting point clouds provide detailed 3-D visualisation of the channel with point accuracy of 6.54 mm, despite low (<60%) overall laser returns as a result of the physical and optical properties of the clean ice, snow, hoar frost and sediment surfaces forming the conduit interior. These point clouds are used to map the conduit morphology, enabling extraction of millimetre-to-centimetre scale geometric measurements. The conduit meanders at a depth of 48 m, with a sinuosity of 2.7, exhibiting teardrop shaped cross-section morphology. This improvement upon traditional surveying techniques demonstrates the potential of TLS as an investigative tool to elucidate the nature of glacier hydrological networks, through reconstruction of channel geometry and wall composition. Article in Journal/Newspaper glacier Journal of Glaciology Svalbard Cambridge University Press Svalbard Teardrop ENVELOPE(163.917,163.917,-78.150,-78.150) Journal of Glaciology 64 243 37 48 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
ABSTRACT The morphology of englacial drainage networks and their temporal evolution are poorly characterised, particularly within cold ice masses. At present, direct observations of englacial channels are restricted in both spatial and temporal resolution. Through novel use of a terrestrial laser scanning (TLS) system, the interior geometry of an englacial channel in Austre Brøggerbreen, Svalbard, was reconstructed and mapped. Twenty-eight laser scan surveys were conducted in March 2016, capturing the glacier surface around a moulin entrance and the uppermost 122 m reach of the adjoining conduit. The resulting point clouds provide detailed 3-D visualisation of the channel with point accuracy of 6.54 mm, despite low (<60%) overall laser returns as a result of the physical and optical properties of the clean ice, snow, hoar frost and sediment surfaces forming the conduit interior. These point clouds are used to map the conduit morphology, enabling extraction of millimetre-to-centimetre scale geometric measurements. The conduit meanders at a depth of 48 m, with a sinuosity of 2.7, exhibiting teardrop shaped cross-section morphology. This improvement upon traditional surveying techniques demonstrates the potential of TLS as an investigative tool to elucidate the nature of glacier hydrological networks, through reconstruction of channel geometry and wall composition. |
format |
Article in Journal/Newspaper |
author |
KAMINTZIS, J. E. JONES, J. P. P. IRVINE-FYNN, T. D. L. HOLT, T. O. BUNTING, P. JENNINGS, S. J. A. PORTER, P. R. HUBBARD, B. |
spellingShingle |
KAMINTZIS, J. E. JONES, J. P. P. IRVINE-FYNN, T. D. L. HOLT, T. O. BUNTING, P. JENNINGS, S. J. A. PORTER, P. R. HUBBARD, B. Assessing the applicability of terrestrial laser scanning for mapping englacial conduits |
author_facet |
KAMINTZIS, J. E. JONES, J. P. P. IRVINE-FYNN, T. D. L. HOLT, T. O. BUNTING, P. JENNINGS, S. J. A. PORTER, P. R. HUBBARD, B. |
author_sort |
KAMINTZIS, J. E. |
title |
Assessing the applicability of terrestrial laser scanning for mapping englacial conduits |
title_short |
Assessing the applicability of terrestrial laser scanning for mapping englacial conduits |
title_full |
Assessing the applicability of terrestrial laser scanning for mapping englacial conduits |
title_fullStr |
Assessing the applicability of terrestrial laser scanning for mapping englacial conduits |
title_full_unstemmed |
Assessing the applicability of terrestrial laser scanning for mapping englacial conduits |
title_sort |
assessing the applicability of terrestrial laser scanning for mapping englacial conduits |
publisher |
Cambridge University Press (CUP) |
publishDate |
2017 |
url |
http://dx.doi.org/10.1017/jog.2017.81 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143017000818 |
long_lat |
ENVELOPE(163.917,163.917,-78.150,-78.150) |
geographic |
Svalbard Teardrop |
geographic_facet |
Svalbard Teardrop |
genre |
glacier Journal of Glaciology Svalbard |
genre_facet |
glacier Journal of Glaciology Svalbard |
op_source |
Journal of Glaciology volume 64, issue 243, page 37-48 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by-nc-sa/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2017.81 |
container_title |
Journal of Glaciology |
container_volume |
64 |
container_issue |
243 |
container_start_page |
37 |
op_container_end_page |
48 |
_version_ |
1802644563381190656 |