Spatiotemporal variations in the surface velocities of Antarctic Peninsula glaciers
Velocity is an important parameter for the estimation of glacier mass balance, which directly signals the response of glaciers to climate change. Antarctic ice sheet movement and the associated spatiotemporal velocity variations are of great significance to global sea level rise. In this study, we e...
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ftcopernicus:oai:publications.copernicus.org:tcd27592 2023-05-15T13:54:27+02:00 Spatiotemporal variations in the surface velocities of Antarctic Peninsula glaciers Chen, J. Ke, C. Q. Shao, Z. D. 2018-09-26 application/pdf https://doi.org/10.5194/tcd-8-5875-2014 https://tc.copernicus.org/preprints/tc-2014-170/ eng eng doi:10.5194/tcd-8-5875-2014 https://tc.copernicus.org/preprints/tc-2014-170/ eISSN: 1994-0424 Text 2018 ftcopernicus https://doi.org/10.5194/tcd-8-5875-2014 2020-07-20T16:24:51Z Velocity is an important parameter for the estimation of glacier mass balance, which directly signals the response of glaciers to climate change. Antarctic ice sheet movement and the associated spatiotemporal velocity variations are of great significance to global sea level rise. In this study, we estimate Antarctic Peninsula glacier velocities using the co-registration of optically sensed images and correlation (hereafter referred to as COSI-Corr) based on moderate-resolution imaging spectroradiometer Level 1B data (hereafter referred to as MODIS L1B). The results show that the glaciers of Graham Land and the Larsen Ice Shelf have substantially different velocity features. The Graham Land glaciers primarily flow from the peninsula ridge towards the Weddell Sea and Bellingshausen Sea on the east and west sides, respectively. There are very large velocity variations among the different ice streams, with a minimum of < 20 m a −1 and a maximum of 1500 m a −1 (with an average of 100–150 m a −1 ). Over the period 2000–2012, the glaciers of Graham Land accelerated in the south but slowed down in the north. In contrast, the Larsen Ice Shelf flows in a relatively uniform direction, mainly towards the northeast into the Weddell Sea. Its average velocity is 750–800 m a −1 and the maximum is > 1500 m a −1 . During the period 2000–2012, the Larsen Ice Shelf experienced significant acceleration. The use of COSI-Corr based on MODIS L1B data is suitable for glacier velocity monitoring on the Antarctic Peninsula over long time series and large spatial scales. This method is clearly advantageous for analysing macro-scale spatiotemporal variations in glacier movement. Text Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Graham Land Ice Sheet Ice Shelf Larsen Ice Shelf Weddell Sea Copernicus Publications: E-Journals Antarctic Antarctic Peninsula Bellingshausen Sea Graham Land ENVELOPE(-63.500,-63.500,-66.000,-66.000) Larsen Ice Shelf ENVELOPE(-62.500,-62.500,-67.500,-67.500) The Antarctic Weddell Weddell Sea |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Velocity is an important parameter for the estimation of glacier mass balance, which directly signals the response of glaciers to climate change. Antarctic ice sheet movement and the associated spatiotemporal velocity variations are of great significance to global sea level rise. In this study, we estimate Antarctic Peninsula glacier velocities using the co-registration of optically sensed images and correlation (hereafter referred to as COSI-Corr) based on moderate-resolution imaging spectroradiometer Level 1B data (hereafter referred to as MODIS L1B). The results show that the glaciers of Graham Land and the Larsen Ice Shelf have substantially different velocity features. The Graham Land glaciers primarily flow from the peninsula ridge towards the Weddell Sea and Bellingshausen Sea on the east and west sides, respectively. There are very large velocity variations among the different ice streams, with a minimum of < 20 m a −1 and a maximum of 1500 m a −1 (with an average of 100–150 m a −1 ). Over the period 2000–2012, the glaciers of Graham Land accelerated in the south but slowed down in the north. In contrast, the Larsen Ice Shelf flows in a relatively uniform direction, mainly towards the northeast into the Weddell Sea. Its average velocity is 750–800 m a −1 and the maximum is > 1500 m a −1 . During the period 2000–2012, the Larsen Ice Shelf experienced significant acceleration. The use of COSI-Corr based on MODIS L1B data is suitable for glacier velocity monitoring on the Antarctic Peninsula over long time series and large spatial scales. This method is clearly advantageous for analysing macro-scale spatiotemporal variations in glacier movement. |
format |
Text |
author |
Chen, J. Ke, C. Q. Shao, Z. D. |
spellingShingle |
Chen, J. Ke, C. Q. Shao, Z. D. Spatiotemporal variations in the surface velocities of Antarctic Peninsula glaciers |
author_facet |
Chen, J. Ke, C. Q. Shao, Z. D. |
author_sort |
Chen, J. |
title |
Spatiotemporal variations in the surface velocities of Antarctic Peninsula glaciers |
title_short |
Spatiotemporal variations in the surface velocities of Antarctic Peninsula glaciers |
title_full |
Spatiotemporal variations in the surface velocities of Antarctic Peninsula glaciers |
title_fullStr |
Spatiotemporal variations in the surface velocities of Antarctic Peninsula glaciers |
title_full_unstemmed |
Spatiotemporal variations in the surface velocities of Antarctic Peninsula glaciers |
title_sort |
spatiotemporal variations in the surface velocities of antarctic peninsula glaciers |
publishDate |
2018 |
url |
https://doi.org/10.5194/tcd-8-5875-2014 https://tc.copernicus.org/preprints/tc-2014-170/ |
long_lat |
ENVELOPE(-63.500,-63.500,-66.000,-66.000) ENVELOPE(-62.500,-62.500,-67.500,-67.500) |
geographic |
Antarctic Antarctic Peninsula Bellingshausen Sea Graham Land Larsen Ice Shelf The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Bellingshausen Sea Graham Land Larsen Ice Shelf The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Graham Land Ice Sheet Ice Shelf Larsen Ice Shelf Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bellingshausen Sea Graham Land Ice Sheet Ice Shelf Larsen Ice Shelf Weddell Sea |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tcd-8-5875-2014 https://tc.copernicus.org/preprints/tc-2014-170/ |
op_doi |
https://doi.org/10.5194/tcd-8-5875-2014 |
_version_ |
1766260358171852800 |