Seasonal glacier surface velocity fluctuation and contribution of the Eastern and Western Tributary Glaciers in Amery Ice Shelf, East Antarctica
Glaciers play a crucial role in the study of the climate change pattern of the Earth. Remote sensing with access to large archives of data has the ability to monitor glaciers frequently throughout the year. Therefore, remote sensing is the most beneficial tool for the study of glacier dynamics. Fed...
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ftmasarykunivojs:oai:ojs.journals.muni.cz:article/12940 2023-05-15T13:22:05+02:00 Seasonal glacier surface velocity fluctuation and contribution of the Eastern and Western Tributary Glaciers in Amery Ice Shelf, East Antarctica Jawak, Shridhar Digambar Kumar, Shubhang Luis, Alvarinho Joaozinho Pandit, Prashant Hemendra Wankhede, Sagar Filipe 2019-01-01 application/pdf http://journals.muni.cz/CPR/article/view/12940 eng eng Masaryk Univerzity http://journals.muni.cz/CPR/article/view/12940/11292 http://journals.muni.cz/CPR/article/view/12940 Copyright (c) 2020 Czech Polar Reports https://creativecommons.org/licenses/by-nc-nd/4.0 CC-BY-NC-ND Czech Polar Reports; Vol 9 No 1 (2019); 49-60 Czech Polar Reports; Vol. 9 No. 1 (2019); 49-60 1805-0697 1805-0689 Antarctic glacier velocity offset tracking synthetic aperture radar info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 ftmasarykunivojs 2022-06-26T10:16:39Z Glaciers play a crucial role in the study of the climate change pattern of the Earth. Remote sensing with access to large archives of data has the ability to monitor glaciers frequently throughout the year. Therefore, remote sensing is the most beneficial tool for the study of glacier dynamics. Fed by many tributaries from different sides, the Amery Ice Shelf (AIS) is one of the largest ice shelves that drains ice from the Antarctic ice sheet into the Southern Ocean. This study focuses on the eastern and the western tributaries of the AIS. The primary objective of the study was to derive the velocity of the tributary glaciers and the secondary objective was to compare variations in their velocities between the summer and winter season. This study was carried on using the European Space Agency’s (ESA) Sentinel-1 satellite’s Synthetic Aperture Radar (SAR) data acquired from the Sentinel data portal. Offset tracking method was applied to the Ground Range Detected (GRD) product of the Sentinel-1 interferometric wide (IW) swath acquisition mode. The maximum velocity in summer was observed to be around 610 m/yr in the eastern tributary glacier meeting the ice shelf near the Pickering Nunatak, and around 345 m/yr in the Charybdis Glacier Basin from the western side. The maximum velocity in the winter was observed to be 553 m/yr in the eastern side near the Pickering Nunatak whereas 323 m/yr from the western side in the Charybdis Glacier Basin. The accuracy of the derived glacier velocities was computed using bias and root mean square (RMS) error. For the analysis, the publicly available velocity datasets were used. The accuracy based on RMS error was observed to be 85-90% for both seasons with bias values up to 25 m/yr and root mean square error values up to 30 m/yr. Article in Journal/Newspaper Amery Ice Shelf Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves Southern Ocean Masaryk University Journals Antarctic Southern Ocean The Antarctic East Antarctica Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Amery Ice Shelf ENVELOPE(71.000,71.000,-69.750,-69.750) The Sentinel ENVELOPE(73.317,73.317,-52.983,-52.983) Charybdis ENVELOPE(-60.154,-60.154,-62.477,-62.477) Pickering Nunatak ENVELOPE(70.783,70.783,-71.400,-71.400) Charybdis Glacier ENVELOPE(66.925,66.925,-70.419,-70.419) |
institution |
Open Polar |
collection |
Masaryk University Journals |
op_collection_id |
ftmasarykunivojs |
language |
English |
topic |
Antarctic glacier velocity offset tracking synthetic aperture radar |
spellingShingle |
Antarctic glacier velocity offset tracking synthetic aperture radar Jawak, Shridhar Digambar Kumar, Shubhang Luis, Alvarinho Joaozinho Pandit, Prashant Hemendra Wankhede, Sagar Filipe Seasonal glacier surface velocity fluctuation and contribution of the Eastern and Western Tributary Glaciers in Amery Ice Shelf, East Antarctica |
topic_facet |
Antarctic glacier velocity offset tracking synthetic aperture radar |
description |
Glaciers play a crucial role in the study of the climate change pattern of the Earth. Remote sensing with access to large archives of data has the ability to monitor glaciers frequently throughout the year. Therefore, remote sensing is the most beneficial tool for the study of glacier dynamics. Fed by many tributaries from different sides, the Amery Ice Shelf (AIS) is one of the largest ice shelves that drains ice from the Antarctic ice sheet into the Southern Ocean. This study focuses on the eastern and the western tributaries of the AIS. The primary objective of the study was to derive the velocity of the tributary glaciers and the secondary objective was to compare variations in their velocities between the summer and winter season. This study was carried on using the European Space Agency’s (ESA) Sentinel-1 satellite’s Synthetic Aperture Radar (SAR) data acquired from the Sentinel data portal. Offset tracking method was applied to the Ground Range Detected (GRD) product of the Sentinel-1 interferometric wide (IW) swath acquisition mode. The maximum velocity in summer was observed to be around 610 m/yr in the eastern tributary glacier meeting the ice shelf near the Pickering Nunatak, and around 345 m/yr in the Charybdis Glacier Basin from the western side. The maximum velocity in the winter was observed to be 553 m/yr in the eastern side near the Pickering Nunatak whereas 323 m/yr from the western side in the Charybdis Glacier Basin. The accuracy of the derived glacier velocities was computed using bias and root mean square (RMS) error. For the analysis, the publicly available velocity datasets were used. The accuracy based on RMS error was observed to be 85-90% for both seasons with bias values up to 25 m/yr and root mean square error values up to 30 m/yr. |
format |
Article in Journal/Newspaper |
author |
Jawak, Shridhar Digambar Kumar, Shubhang Luis, Alvarinho Joaozinho Pandit, Prashant Hemendra Wankhede, Sagar Filipe |
author_facet |
Jawak, Shridhar Digambar Kumar, Shubhang Luis, Alvarinho Joaozinho Pandit, Prashant Hemendra Wankhede, Sagar Filipe |
author_sort |
Jawak, Shridhar Digambar |
title |
Seasonal glacier surface velocity fluctuation and contribution of the Eastern and Western Tributary Glaciers in Amery Ice Shelf, East Antarctica |
title_short |
Seasonal glacier surface velocity fluctuation and contribution of the Eastern and Western Tributary Glaciers in Amery Ice Shelf, East Antarctica |
title_full |
Seasonal glacier surface velocity fluctuation and contribution of the Eastern and Western Tributary Glaciers in Amery Ice Shelf, East Antarctica |
title_fullStr |
Seasonal glacier surface velocity fluctuation and contribution of the Eastern and Western Tributary Glaciers in Amery Ice Shelf, East Antarctica |
title_full_unstemmed |
Seasonal glacier surface velocity fluctuation and contribution of the Eastern and Western Tributary Glaciers in Amery Ice Shelf, East Antarctica |
title_sort |
seasonal glacier surface velocity fluctuation and contribution of the eastern and western tributary glaciers in amery ice shelf, east antarctica |
publisher |
Masaryk Univerzity |
publishDate |
2019 |
url |
http://journals.muni.cz/CPR/article/view/12940 |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(71.000,71.000,-69.750,-69.750) ENVELOPE(73.317,73.317,-52.983,-52.983) ENVELOPE(-60.154,-60.154,-62.477,-62.477) ENVELOPE(70.783,70.783,-71.400,-71.400) ENVELOPE(66.925,66.925,-70.419,-70.419) |
geographic |
Antarctic Southern Ocean The Antarctic East Antarctica Amery Amery Ice Shelf The Sentinel Charybdis Pickering Nunatak Charybdis Glacier |
geographic_facet |
Antarctic Southern Ocean The Antarctic East Antarctica Amery Amery Ice Shelf The Sentinel Charybdis Pickering Nunatak Charybdis Glacier |
genre |
Amery Ice Shelf Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves Southern Ocean |
genre_facet |
Amery Ice Shelf Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves Southern Ocean |
op_source |
Czech Polar Reports; Vol 9 No 1 (2019); 49-60 Czech Polar Reports; Vol. 9 No. 1 (2019); 49-60 1805-0697 1805-0689 |
op_relation |
http://journals.muni.cz/CPR/article/view/12940/11292 http://journals.muni.cz/CPR/article/view/12940 |
op_rights |
Copyright (c) 2020 Czech Polar Reports https://creativecommons.org/licenses/by-nc-nd/4.0 |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766363220809875456 |