Vertical Structure of Diurnal Englacial Hydrology Cycle at Helheim Glacier, East Greenland
The interior dynamics of Helheim Glacier were monitored using an autonomous phase‐sensitive radio‐echo sounder (ApRES) during two consecutive summers. The return signals from all observational sites exhibited strong non‐tidal, depth‐dependent diurnal variations. We show that these variations in the...
Published in: | Geophysical Research Letters |
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Language: | English |
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American Geophysical Union
2018
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Online Access: | http://nora.nerc.ac.uk/id/eprint/521170/ https://nora.nerc.ac.uk/id/eprint/521170/1/Va-kov-_et_al-2018-Geophysical_Research_Letters.pdf https://doi.org/10.1029/2018GL077869 |
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ftnerc:oai:nora.nerc.ac.uk:521170 2023-05-15T16:03:45+02:00 Vertical Structure of Diurnal Englacial Hydrology Cycle at Helheim Glacier, East Greenland Vaňková, Irena Voytenko, Denis Nicholls, Keith W. Xie, Surui Parizek, Byron R. Holland, David M. 2018-08-28 text http://nora.nerc.ac.uk/id/eprint/521170/ https://nora.nerc.ac.uk/id/eprint/521170/1/Va-kov-_et_al-2018-Geophysical_Research_Letters.pdf https://doi.org/10.1029/2018GL077869 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/521170/1/Va-kov-_et_al-2018-Geophysical_Research_Letters.pdf Vaňková, Irena; Voytenko, Denis; Nicholls, Keith W. orcid:0000-0002-2188-4509 Xie, Surui; Parizek, Byron R.; Holland, David M. 2018 Vertical Structure of Diurnal Englacial Hydrology Cycle at Helheim Glacier, East Greenland. Geophysical Research Letters, 45 (16). 8352-8362. https://doi.org/10.1029/2018GL077869 <https://doi.org/10.1029/2018GL077869> Publication - Article PeerReviewed 2018 ftnerc https://doi.org/10.1029/2018GL077869 2023-02-04T19:47:10Z The interior dynamics of Helheim Glacier were monitored using an autonomous phase‐sensitive radio‐echo sounder (ApRES) during two consecutive summers. The return signals from all observational sites exhibited strong non‐tidal, depth‐dependent diurnal variations. We show that these variations in the glacier interior can be explained by an englacial diurnal meltwater cycle: a data interpretation that assumes constant ice‐column composition through time leads to dynamical inconsistencies with concurrent observations from GPS and terrestrial radar. The observed diurnal meltwater cycle is spatially variable, both between different sites and in the vertical, consistent with the existence of a dense and complex englacial hydrologic network. Future applications of this observational technique could reveal long‐term meltwater behavior inside glaciers and ice sheets, leading to an improved understanding of the spatiotemporal evolution of the basal boundary conditions needed to simulate them realistically. Article in Journal/Newspaper East Greenland glacier Greenland Natural Environment Research Council: NERC Open Research Archive Greenland Geophysical Research Letters 45 16 8352 8362 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The interior dynamics of Helheim Glacier were monitored using an autonomous phase‐sensitive radio‐echo sounder (ApRES) during two consecutive summers. The return signals from all observational sites exhibited strong non‐tidal, depth‐dependent diurnal variations. We show that these variations in the glacier interior can be explained by an englacial diurnal meltwater cycle: a data interpretation that assumes constant ice‐column composition through time leads to dynamical inconsistencies with concurrent observations from GPS and terrestrial radar. The observed diurnal meltwater cycle is spatially variable, both between different sites and in the vertical, consistent with the existence of a dense and complex englacial hydrologic network. Future applications of this observational technique could reveal long‐term meltwater behavior inside glaciers and ice sheets, leading to an improved understanding of the spatiotemporal evolution of the basal boundary conditions needed to simulate them realistically. |
format |
Article in Journal/Newspaper |
author |
Vaňková, Irena Voytenko, Denis Nicholls, Keith W. Xie, Surui Parizek, Byron R. Holland, David M. |
spellingShingle |
Vaňková, Irena Voytenko, Denis Nicholls, Keith W. Xie, Surui Parizek, Byron R. Holland, David M. Vertical Structure of Diurnal Englacial Hydrology Cycle at Helheim Glacier, East Greenland |
author_facet |
Vaňková, Irena Voytenko, Denis Nicholls, Keith W. Xie, Surui Parizek, Byron R. Holland, David M. |
author_sort |
Vaňková, Irena |
title |
Vertical Structure of Diurnal Englacial Hydrology Cycle at Helheim Glacier, East Greenland |
title_short |
Vertical Structure of Diurnal Englacial Hydrology Cycle at Helheim Glacier, East Greenland |
title_full |
Vertical Structure of Diurnal Englacial Hydrology Cycle at Helheim Glacier, East Greenland |
title_fullStr |
Vertical Structure of Diurnal Englacial Hydrology Cycle at Helheim Glacier, East Greenland |
title_full_unstemmed |
Vertical Structure of Diurnal Englacial Hydrology Cycle at Helheim Glacier, East Greenland |
title_sort |
vertical structure of diurnal englacial hydrology cycle at helheim glacier, east greenland |
publisher |
American Geophysical Union |
publishDate |
2018 |
url |
http://nora.nerc.ac.uk/id/eprint/521170/ https://nora.nerc.ac.uk/id/eprint/521170/1/Va-kov-_et_al-2018-Geophysical_Research_Letters.pdf https://doi.org/10.1029/2018GL077869 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
East Greenland glacier Greenland |
genre_facet |
East Greenland glacier Greenland |
op_relation |
https://nora.nerc.ac.uk/id/eprint/521170/1/Va-kov-_et_al-2018-Geophysical_Research_Letters.pdf Vaňková, Irena; Voytenko, Denis; Nicholls, Keith W. orcid:0000-0002-2188-4509 Xie, Surui; Parizek, Byron R.; Holland, David M. 2018 Vertical Structure of Diurnal Englacial Hydrology Cycle at Helheim Glacier, East Greenland. Geophysical Research Letters, 45 (16). 8352-8362. https://doi.org/10.1029/2018GL077869 <https://doi.org/10.1029/2018GL077869> |
op_doi |
https://doi.org/10.1029/2018GL077869 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
16 |
container_start_page |
8352 |
op_container_end_page |
8362 |
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1766399433061171200 |