Basal dynamics of Kronebreen, a fast-flowing tidewater glacier in Svalbard: non-local spatio-temporal response to water input
We evaluate the variability in basal friction for Kronebreen, Svalbard, a fast-flowing tidewater glacier. We invert 3 years (2013–15) of surface velocities at high temporal resolution (generally 11 days), to estimate the changing basal properties of the glacier. Our results suggest that sliding beha...
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ftdoajarticles:oai:doaj.org/article:0e26959c297e4d2684dea75cb6343a61 2023-05-15T15:07:59+02:00 Basal dynamics of Kronebreen, a fast-flowing tidewater glacier in Svalbard: non-local spatio-temporal response to water input DOROTHÉE VALLOT RICKARD PETTERSSON ADRIAN LUCKMAN DOUGLAS I. BENN THOMAS ZWINGER WARD J. J. VAN PELT JACK KOHLER MARTINA SCHÄFER BJÖRN CLAREMAR NICHOLAS R. J. HULTON 2017-12-01T00:00:00Z https://doi.org/10.1017/jog.2017.69 https://doaj.org/article/0e26959c297e4d2684dea75cb6343a61 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143017000697/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2017.69 0022-1430 1727-5652 https://doaj.org/article/0e26959c297e4d2684dea75cb6343a61 Journal of Glaciology, Vol 63, Pp 1012-1024 (2017) Arctic glaciology glacier modelling ice dynamics ice velocity subglacial processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2017 ftdoajarticles https://doi.org/10.1017/jog.2017.69 2023-03-12T01:30:59Z We evaluate the variability in basal friction for Kronebreen, Svalbard, a fast-flowing tidewater glacier. We invert 3 years (2013–15) of surface velocities at high temporal resolution (generally 11 days), to estimate the changing basal properties of the glacier. Our results suggest that sliding behaviour of Kronebreen within a year is primarily influenced by changes in water input patterns during the meltwater season and basal friction is highly variable from a year to another. At present, models usually employ parameterisations to encompass the complex physics of glacier sliding by mathematically simulate their net effect. For such ice masses with strong seasonal variations of surface melt, the spatio-temporal patterns of basal friction imply that it is neither possible nor appropriate to use a parameterisation for bed friction that is fixed in space and/or time, at least in a timescale of a few years. Basal sliding may not only be governed by local processes such as basal topography or summer melt, but also be mediated by factors that vary over a larger distance and over a longer time period such as subglacial hydrology organisation, ice-thickness changes or calving front geometry. Article in Journal/Newspaper Arctic glacier Journal of Glaciology Svalbard Tidewater Directory of Open Access Journals: DOAJ Articles Arctic Svalbard Kronebreen ENVELOPE(13.333,13.333,78.833,78.833) Journal of Glaciology 63 242 1012 1024 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic glaciology glacier modelling ice dynamics ice velocity subglacial processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Arctic glaciology glacier modelling ice dynamics ice velocity subglacial processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 DOROTHÉE VALLOT RICKARD PETTERSSON ADRIAN LUCKMAN DOUGLAS I. BENN THOMAS ZWINGER WARD J. J. VAN PELT JACK KOHLER MARTINA SCHÄFER BJÖRN CLAREMAR NICHOLAS R. J. HULTON Basal dynamics of Kronebreen, a fast-flowing tidewater glacier in Svalbard: non-local spatio-temporal response to water input |
topic_facet |
Arctic glaciology glacier modelling ice dynamics ice velocity subglacial processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
We evaluate the variability in basal friction for Kronebreen, Svalbard, a fast-flowing tidewater glacier. We invert 3 years (2013–15) of surface velocities at high temporal resolution (generally 11 days), to estimate the changing basal properties of the glacier. Our results suggest that sliding behaviour of Kronebreen within a year is primarily influenced by changes in water input patterns during the meltwater season and basal friction is highly variable from a year to another. At present, models usually employ parameterisations to encompass the complex physics of glacier sliding by mathematically simulate their net effect. For such ice masses with strong seasonal variations of surface melt, the spatio-temporal patterns of basal friction imply that it is neither possible nor appropriate to use a parameterisation for bed friction that is fixed in space and/or time, at least in a timescale of a few years. Basal sliding may not only be governed by local processes such as basal topography or summer melt, but also be mediated by factors that vary over a larger distance and over a longer time period such as subglacial hydrology organisation, ice-thickness changes or calving front geometry. |
format |
Article in Journal/Newspaper |
author |
DOROTHÉE VALLOT RICKARD PETTERSSON ADRIAN LUCKMAN DOUGLAS I. BENN THOMAS ZWINGER WARD J. J. VAN PELT JACK KOHLER MARTINA SCHÄFER BJÖRN CLAREMAR NICHOLAS R. J. HULTON |
author_facet |
DOROTHÉE VALLOT RICKARD PETTERSSON ADRIAN LUCKMAN DOUGLAS I. BENN THOMAS ZWINGER WARD J. J. VAN PELT JACK KOHLER MARTINA SCHÄFER BJÖRN CLAREMAR NICHOLAS R. J. HULTON |
author_sort |
DOROTHÉE VALLOT |
title |
Basal dynamics of Kronebreen, a fast-flowing tidewater glacier in Svalbard: non-local spatio-temporal response to water input |
title_short |
Basal dynamics of Kronebreen, a fast-flowing tidewater glacier in Svalbard: non-local spatio-temporal response to water input |
title_full |
Basal dynamics of Kronebreen, a fast-flowing tidewater glacier in Svalbard: non-local spatio-temporal response to water input |
title_fullStr |
Basal dynamics of Kronebreen, a fast-flowing tidewater glacier in Svalbard: non-local spatio-temporal response to water input |
title_full_unstemmed |
Basal dynamics of Kronebreen, a fast-flowing tidewater glacier in Svalbard: non-local spatio-temporal response to water input |
title_sort |
basal dynamics of kronebreen, a fast-flowing tidewater glacier in svalbard: non-local spatio-temporal response to water input |
publisher |
Cambridge University Press |
publishDate |
2017 |
url |
https://doi.org/10.1017/jog.2017.69 https://doaj.org/article/0e26959c297e4d2684dea75cb6343a61 |
long_lat |
ENVELOPE(13.333,13.333,78.833,78.833) |
geographic |
Arctic Svalbard Kronebreen |
geographic_facet |
Arctic Svalbard Kronebreen |
genre |
Arctic glacier Journal of Glaciology Svalbard Tidewater |
genre_facet |
Arctic glacier Journal of Glaciology Svalbard Tidewater |
op_source |
Journal of Glaciology, Vol 63, Pp 1012-1024 (2017) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143017000697/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2017.69 0022-1430 1727-5652 https://doaj.org/article/0e26959c297e4d2684dea75cb6343a61 |
op_doi |
https://doi.org/10.1017/jog.2017.69 |
container_title |
Journal of Glaciology |
container_volume |
63 |
container_issue |
242 |
container_start_page |
1012 |
op_container_end_page |
1024 |
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1766339421539401728 |