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...
Published in: | Journal of Glaciology |
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Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2017
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Online Access: | https://research.ulapland.fi/fi/publications/716e4582-6452-4d84-981e-30f9ddfc79b0 https://doi.org/10.1017/jog.2017.69 |
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ftulaplandcdispu:oai:lacris.ulapland.fi:publications/716e4582-6452-4d84-981e-30f9ddfc79b0 2024-06-23T07:50:31+00:00 Basal dynamics of Kronebreen, a fast-flowing tidewater glacier in Svalbard:non-local spatio-temporal response to water input Vallot, Dorothée Pettersson, Rickard Luckman, Adrian Benn, Douglas I. Zwinger, Thomas van Pelt, Ward J. J. Kohler, Jack Schäfer, Martina Claremar, Björn Hulton, Nicholas R. J. 2017 https://research.ulapland.fi/fi/publications/716e4582-6452-4d84-981e-30f9ddfc79b0 https://doi.org/10.1017/jog.2017.69 eng eng https://research.ulapland.fi/fi/publications/716e4582-6452-4d84-981e-30f9ddfc79b0 info:eu-repo/semantics/openAccess Vallot , D , Pettersson , R , Luckman , A , Benn , D I , Zwinger , T , van Pelt , W J J , Kohler , J , Schäfer , M , Claremar , B & Hulton , N R J 2017 , ' Basal dynamics of Kronebreen, a fast-flowing tidewater glacier in Svalbard : non-local spatio-temporal response to water input ' , Journal of Glaciology , vol. 63 , no. 242 , pp. 1012-1024 . https://doi.org/10.1017/jog.2017.69 Arctic glaciology glacier modelling ice dynamics ice velocity subglacial processes /dk/atira/pure/person/fieldofscience2010/1/17/1 name=Geosciences article 2017 ftulaplandcdispu https://doi.org/10.1017/jog.2017.69 2024-06-10T23:41:12Z 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 LaCRIS - University of Lapland Current Research System Arctic Kronebreen ENVELOPE(13.333,13.333,78.833,78.833) Svalbard Journal of Glaciology 63 242 1012 1024 |
institution |
Open Polar |
collection |
LaCRIS - University of Lapland Current Research System |
op_collection_id |
ftulaplandcdispu |
language |
English |
topic |
Arctic glaciology glacier modelling ice dynamics ice velocity subglacial processes /dk/atira/pure/person/fieldofscience2010/1/17/1 name=Geosciences |
spellingShingle |
Arctic glaciology glacier modelling ice dynamics ice velocity subglacial processes /dk/atira/pure/person/fieldofscience2010/1/17/1 name=Geosciences Vallot, Dorothée Pettersson, Rickard Luckman, Adrian Benn, Douglas I. Zwinger, Thomas van Pelt, Ward J. J. Kohler, Jack Schäfer, Martina Claremar, Björn Hulton, Nicholas R. J. 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 /dk/atira/pure/person/fieldofscience2010/1/17/1 name=Geosciences |
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 |
Vallot, Dorothée Pettersson, Rickard Luckman, Adrian Benn, Douglas I. Zwinger, Thomas van Pelt, Ward J. J. Kohler, Jack Schäfer, Martina Claremar, Björn Hulton, Nicholas R. J. |
author_facet |
Vallot, Dorothée Pettersson, Rickard Luckman, Adrian Benn, Douglas I. Zwinger, Thomas van Pelt, Ward J. J. Kohler, Jack Schäfer, Martina Claremar, Björn Hulton, Nicholas R. J. |
author_sort |
Vallot, Dorothée |
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 |
publishDate |
2017 |
url |
https://research.ulapland.fi/fi/publications/716e4582-6452-4d84-981e-30f9ddfc79b0 https://doi.org/10.1017/jog.2017.69 |
long_lat |
ENVELOPE(13.333,13.333,78.833,78.833) |
geographic |
Arctic Kronebreen Svalbard |
geographic_facet |
Arctic Kronebreen Svalbard |
genre |
Arctic glacier Journal of Glaciology Svalbard Tidewater |
genre_facet |
Arctic glacier Journal of Glaciology Svalbard Tidewater |
op_source |
Vallot , D , Pettersson , R , Luckman , A , Benn , D I , Zwinger , T , van Pelt , W J J , Kohler , J , Schäfer , M , Claremar , B & Hulton , N R J 2017 , ' Basal dynamics of Kronebreen, a fast-flowing tidewater glacier in Svalbard : non-local spatio-temporal response to water input ' , Journal of Glaciology , vol. 63 , no. 242 , pp. 1012-1024 . https://doi.org/10.1017/jog.2017.69 |
op_relation |
https://research.ulapland.fi/fi/publications/716e4582-6452-4d84-981e-30f9ddfc79b0 |
op_rights |
info:eu-repo/semantics/openAccess |
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 |
_version_ |
1802641422056161280 |