Temporal Variations in Ice Thickness of the Shirase Glacier Derived from Cryosat-2/SIRAL Data
This study presents the feasibility of estimating the ice thickness of the Shirase Glacier using the synthetic aperture interferometric radar altimeter (SIRAL) on board the CryoSat-2 and the interannual variation of the ice thickness of the Shirase Glacier in 2011–2020. The SIRAL data were converted...
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Online Access: | https://doi.org/10.3390/rs15051205 |
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ftmdpi:oai:mdpi.com:/2072-4292/15/5/1205/ 2023-08-20T04:09:47+02:00 Temporal Variations in Ice Thickness of the Shirase Glacier Derived from Cryosat-2/SIRAL Data Yurina Satake Kazuki Nakamura agris 2023-02-22 application/pdf https://doi.org/10.3390/rs15051205 EN eng Multidisciplinary Digital Publishing Institute Biogeosciences Remote Sensing https://dx.doi.org/10.3390/rs15051205 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 15; Issue 5; Pages: 1205 ice thickness Shirase Glacier altimeter Text 2023 ftmdpi https://doi.org/10.3390/rs15051205 2023-08-01T08:56:18Z This study presents the feasibility of estimating the ice thickness of the Shirase Glacier using the synthetic aperture interferometric radar altimeter (SIRAL) on board the CryoSat-2 and the interannual variation of the ice thickness of the Shirase Glacier in 2011–2020. The SIRAL data were converted to ice thickness by assuming hydrostatic equilibrium, and the results showed that the ice thickness decreased from the grounding line to the terminus of the glacier. Furthermore, the ice thickness decreased 30 km downstream from the grounding line of the glacier in 2012 and 2017, and decreased 55 km and 60 km downstream from the grounding line of the glacier at other times, which was attributed to the discharge of landfast ice and the retreat of the glacier terminus. When the flow of glacial ice can be reasonably approximated as an incompressible fluid, and the law of conservation of mass can be applied to the ice stream, the multiple of the velocity and the underlying ice thickness under a constant ice density can be shown to correspond to the equation of continuity. Consequently, this study revealed that the ice thickness decreases with accelerating flow velocity, which is coincident with past outflow events. Text Shirase Glacier MDPI Open Access Publishing Shirase Glacier ENVELOPE(39.000,39.000,-70.333,-70.333) Remote Sensing 15 5 1205 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
ice thickness Shirase Glacier altimeter |
spellingShingle |
ice thickness Shirase Glacier altimeter Yurina Satake Kazuki Nakamura Temporal Variations in Ice Thickness of the Shirase Glacier Derived from Cryosat-2/SIRAL Data |
topic_facet |
ice thickness Shirase Glacier altimeter |
description |
This study presents the feasibility of estimating the ice thickness of the Shirase Glacier using the synthetic aperture interferometric radar altimeter (SIRAL) on board the CryoSat-2 and the interannual variation of the ice thickness of the Shirase Glacier in 2011–2020. The SIRAL data were converted to ice thickness by assuming hydrostatic equilibrium, and the results showed that the ice thickness decreased from the grounding line to the terminus of the glacier. Furthermore, the ice thickness decreased 30 km downstream from the grounding line of the glacier in 2012 and 2017, and decreased 55 km and 60 km downstream from the grounding line of the glacier at other times, which was attributed to the discharge of landfast ice and the retreat of the glacier terminus. When the flow of glacial ice can be reasonably approximated as an incompressible fluid, and the law of conservation of mass can be applied to the ice stream, the multiple of the velocity and the underlying ice thickness under a constant ice density can be shown to correspond to the equation of continuity. Consequently, this study revealed that the ice thickness decreases with accelerating flow velocity, which is coincident with past outflow events. |
format |
Text |
author |
Yurina Satake Kazuki Nakamura |
author_facet |
Yurina Satake Kazuki Nakamura |
author_sort |
Yurina Satake |
title |
Temporal Variations in Ice Thickness of the Shirase Glacier Derived from Cryosat-2/SIRAL Data |
title_short |
Temporal Variations in Ice Thickness of the Shirase Glacier Derived from Cryosat-2/SIRAL Data |
title_full |
Temporal Variations in Ice Thickness of the Shirase Glacier Derived from Cryosat-2/SIRAL Data |
title_fullStr |
Temporal Variations in Ice Thickness of the Shirase Glacier Derived from Cryosat-2/SIRAL Data |
title_full_unstemmed |
Temporal Variations in Ice Thickness of the Shirase Glacier Derived from Cryosat-2/SIRAL Data |
title_sort |
temporal variations in ice thickness of the shirase glacier derived from cryosat-2/siral data |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/rs15051205 |
op_coverage |
agris |
long_lat |
ENVELOPE(39.000,39.000,-70.333,-70.333) |
geographic |
Shirase Glacier |
geographic_facet |
Shirase Glacier |
genre |
Shirase Glacier |
genre_facet |
Shirase Glacier |
op_source |
Remote Sensing; Volume 15; Issue 5; Pages: 1205 |
op_relation |
Biogeosciences Remote Sensing https://dx.doi.org/10.3390/rs15051205 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs15051205 |
container_title |
Remote Sensing |
container_volume |
15 |
container_issue |
5 |
container_start_page |
1205 |
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1774723468732923904 |