Retrieving the grounding lines of the Riiser-Larsen Ice Shelf using Sentinel-1 SAR images
Accurately locating and studying grounding lines is essential for predicting the response of glaciers to climate change. However, it is challenging to find grounding lines since they are subglacial features. In this study, Sentinel-1 synthetic aperture radar (SAR) data were utilized to derive the gr...
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2023
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Online Access: | https://doi.org/10.1080/17538947.2023.2229785 https://doaj.org/article/6e0a668228ee484485a55de29c8e5ed6 |
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ftdoajarticles:oai:doaj.org/article:6e0a668228ee484485a55de29c8e5ed6 2023-10-09T21:47:05+02:00 Retrieving the grounding lines of the Riiser-Larsen Ice Shelf using Sentinel-1 SAR images Faming Gong Kui Zhang Shujun Liu 2023-12-01T00:00:00Z https://doi.org/10.1080/17538947.2023.2229785 https://doaj.org/article/6e0a668228ee484485a55de29c8e5ed6 EN eng Taylor & Francis Group http://dx.doi.org/10.1080/17538947.2023.2229785 https://doaj.org/toc/1753-8947 https://doaj.org/toc/1753-8955 1753-8947 1753-8955 doi:10.1080/17538947.2023.2229785 https://doaj.org/article/6e0a668228ee484485a55de29c8e5ed6 International Journal of Digital Earth, Vol 16, Iss 1, Pp 2467-2486 (2023) antarctica ice shelf grounding line radar interferometry sentinel-1 images Mathematical geography. Cartography GA1-1776 article 2023 ftdoajarticles https://doi.org/10.1080/17538947.2023.2229785 2023-09-24T00:35:54Z Accurately locating and studying grounding lines is essential for predicting the response of glaciers to climate change. However, it is challenging to find grounding lines since they are subglacial features. In this study, Sentinel-1 synthetic aperture radar (SAR) data were utilized to derive the grounding lines of the Riiser-Larsen Ice Shelf. A new method with inspiration drawn from multi-temporal baseline InSAR techniques is proposed. It takes advantage of the temporal consistency of the vertical displacement gradients and identifies grounding zones pixel-by-pixel on a stack of double differential interferograms, thereby providing grounding line proxies. As it fully exploits coherent signals in both spatial and temporal domains, the maximum possible number of grounding zone pixels can be obtained. Moreover, due to the introduction of the concept of the temporal consistency, the method can cope with short term grounding line fluctuations to some extent and may mitigate the influences of atmospheric disturbances and residual ice displacements. The resulting grounding lines are compared with the MEaSUREs Antarctic grounding line product. The comparison confirms the effectiveness of the proposed method and corroborates that the Riiser-Larsen Ice Shelf should have not undergone significant changes over the past few decades. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf Larsen Ice Shelf Riiser Larsen Ice Shelf Riiser-Larsen Ice Shelf Directory of Open Access Journals: DOAJ Articles Antarctic Larsen Ice Shelf ENVELOPE(-62.500,-62.500,-67.500,-67.500) Riiser-Larsen ENVELOPE(50.667,50.667,-66.783,-66.783) Riiser-Larsen Ice Shelf ENVELOPE(-20.000,-20.000,-74.417,-74.417) International Journal of Digital Earth 16 1 2467 2486 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
antarctica ice shelf grounding line radar interferometry sentinel-1 images Mathematical geography. Cartography GA1-1776 |
spellingShingle |
antarctica ice shelf grounding line radar interferometry sentinel-1 images Mathematical geography. Cartography GA1-1776 Faming Gong Kui Zhang Shujun Liu Retrieving the grounding lines of the Riiser-Larsen Ice Shelf using Sentinel-1 SAR images |
topic_facet |
antarctica ice shelf grounding line radar interferometry sentinel-1 images Mathematical geography. Cartography GA1-1776 |
description |
Accurately locating and studying grounding lines is essential for predicting the response of glaciers to climate change. However, it is challenging to find grounding lines since they are subglacial features. In this study, Sentinel-1 synthetic aperture radar (SAR) data were utilized to derive the grounding lines of the Riiser-Larsen Ice Shelf. A new method with inspiration drawn from multi-temporal baseline InSAR techniques is proposed. It takes advantage of the temporal consistency of the vertical displacement gradients and identifies grounding zones pixel-by-pixel on a stack of double differential interferograms, thereby providing grounding line proxies. As it fully exploits coherent signals in both spatial and temporal domains, the maximum possible number of grounding zone pixels can be obtained. Moreover, due to the introduction of the concept of the temporal consistency, the method can cope with short term grounding line fluctuations to some extent and may mitigate the influences of atmospheric disturbances and residual ice displacements. The resulting grounding lines are compared with the MEaSUREs Antarctic grounding line product. The comparison confirms the effectiveness of the proposed method and corroborates that the Riiser-Larsen Ice Shelf should have not undergone significant changes over the past few decades. |
format |
Article in Journal/Newspaper |
author |
Faming Gong Kui Zhang Shujun Liu |
author_facet |
Faming Gong Kui Zhang Shujun Liu |
author_sort |
Faming Gong |
title |
Retrieving the grounding lines of the Riiser-Larsen Ice Shelf using Sentinel-1 SAR images |
title_short |
Retrieving the grounding lines of the Riiser-Larsen Ice Shelf using Sentinel-1 SAR images |
title_full |
Retrieving the grounding lines of the Riiser-Larsen Ice Shelf using Sentinel-1 SAR images |
title_fullStr |
Retrieving the grounding lines of the Riiser-Larsen Ice Shelf using Sentinel-1 SAR images |
title_full_unstemmed |
Retrieving the grounding lines of the Riiser-Larsen Ice Shelf using Sentinel-1 SAR images |
title_sort |
retrieving the grounding lines of the riiser-larsen ice shelf using sentinel-1 sar images |
publisher |
Taylor & Francis Group |
publishDate |
2023 |
url |
https://doi.org/10.1080/17538947.2023.2229785 https://doaj.org/article/6e0a668228ee484485a55de29c8e5ed6 |
long_lat |
ENVELOPE(-62.500,-62.500,-67.500,-67.500) ENVELOPE(50.667,50.667,-66.783,-66.783) ENVELOPE(-20.000,-20.000,-74.417,-74.417) |
geographic |
Antarctic Larsen Ice Shelf Riiser-Larsen Riiser-Larsen Ice Shelf |
geographic_facet |
Antarctic Larsen Ice Shelf Riiser-Larsen Riiser-Larsen Ice Shelf |
genre |
Antarc* Antarctic Antarctica Ice Shelf Larsen Ice Shelf Riiser Larsen Ice Shelf Riiser-Larsen Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf Larsen Ice Shelf Riiser Larsen Ice Shelf Riiser-Larsen Ice Shelf |
op_source |
International Journal of Digital Earth, Vol 16, Iss 1, Pp 2467-2486 (2023) |
op_relation |
http://dx.doi.org/10.1080/17538947.2023.2229785 https://doaj.org/toc/1753-8947 https://doaj.org/toc/1753-8955 1753-8947 1753-8955 doi:10.1080/17538947.2023.2229785 https://doaj.org/article/6e0a668228ee484485a55de29c8e5ed6 |
op_doi |
https://doi.org/10.1080/17538947.2023.2229785 |
container_title |
International Journal of Digital Earth |
container_volume |
16 |
container_issue |
1 |
container_start_page |
2467 |
op_container_end_page |
2486 |
_version_ |
1779309836491554816 |