Extraction and Analysis of the Three-Dimensional Features of Crevasses in the Amery Ice Shelf Based on ICESat-2 ATL06 Data
Crevasse is an important characteristic of ice shelf internal structure, and also an important index to measure the stability of ice shelf. This study aims to detect crevasses from ICESat-2 data and obtain three-dimensional features of the crevasse. First, the change of along-track surface slope and...
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ftdoajarticles:oai:doaj.org/article:3d447502f5154bb9b553039f72398e2a 2023-05-15T13:22:00+02:00 Extraction and Analysis of the Three-Dimensional Features of Crevasses in the Amery Ice Shelf Based on ICESat-2 ATL06 Data Guoyuan Li Jinquan Guo Liang Pei Shuaitai Zhang Xinming Tang Jiaqi Yao 2021-01-01T00:00:00Z https://doi.org/10.1109/JSTARS.2021.3085302 https://doaj.org/article/3d447502f5154bb9b553039f72398e2a EN eng IEEE https://ieeexplore.ieee.org/document/9444795/ https://doaj.org/toc/2151-1535 2151-1535 doi:10.1109/JSTARS.2021.3085302 https://doaj.org/article/3d447502f5154bb9b553039f72398e2a IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 14, Pp 5796-5806 (2021) Amery ice shelf (AIS) crevasse ICESat-2 satellite laser altimetry three-dimensional (3-D) features Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 article 2021 ftdoajarticles https://doi.org/10.1109/JSTARS.2021.3085302 2022-12-31T10:23:41Z Crevasse is an important characteristic of ice shelf internal structure, and also an important index to measure the stability of ice shelf. This study aims to detect crevasses from ICESat-2 data and obtain three-dimensional features of the crevasse. First, the change of along-track surface slope and the depth threshold is combined to obtain the crevasse bottom points and the crevasse edge points. Second, the distance between the crevasse bottom points and the fitted ice shelf surface by crevasse edge points is used as the crevasse bottom points depth. Third, the crevasse direction is judged by the strong and weak laser positions and the width is calculated by the crevasse edge points and crevasse direction. The Amery ice shelf (AIS) is chosen as the test area to validate the method by ATL06 data, combined with the Landsat-8 optical image. The depth of the crevasses in the AIS is about ranges from 2.0 to 60.0 m, and the width is mainly 400 to 1600 m, and the width and length of the L3 rift have dramatically changed, which is an indicator that the AIS is in a new calving cycle. The method in this article can accurately obtain three-dimensional information of the crevasses, find crevasses with abnormal changes in depth and width, and provide effective help for predicting the calving of the ice shelf. Article in Journal/Newspaper Amery Ice Shelf Ice Shelf Directory of Open Access Journals: DOAJ Articles Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Amery Ice Shelf ENVELOPE(71.000,71.000,-69.750,-69.750) IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 14 5796 5806 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Amery ice shelf (AIS) crevasse ICESat-2 satellite laser altimetry three-dimensional (3-D) features Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Amery ice shelf (AIS) crevasse ICESat-2 satellite laser altimetry three-dimensional (3-D) features Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 Guoyuan Li Jinquan Guo Liang Pei Shuaitai Zhang Xinming Tang Jiaqi Yao Extraction and Analysis of the Three-Dimensional Features of Crevasses in the Amery Ice Shelf Based on ICESat-2 ATL06 Data |
topic_facet |
Amery ice shelf (AIS) crevasse ICESat-2 satellite laser altimetry three-dimensional (3-D) features Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 |
description |
Crevasse is an important characteristic of ice shelf internal structure, and also an important index to measure the stability of ice shelf. This study aims to detect crevasses from ICESat-2 data and obtain three-dimensional features of the crevasse. First, the change of along-track surface slope and the depth threshold is combined to obtain the crevasse bottom points and the crevasse edge points. Second, the distance between the crevasse bottom points and the fitted ice shelf surface by crevasse edge points is used as the crevasse bottom points depth. Third, the crevasse direction is judged by the strong and weak laser positions and the width is calculated by the crevasse edge points and crevasse direction. The Amery ice shelf (AIS) is chosen as the test area to validate the method by ATL06 data, combined with the Landsat-8 optical image. The depth of the crevasses in the AIS is about ranges from 2.0 to 60.0 m, and the width is mainly 400 to 1600 m, and the width and length of the L3 rift have dramatically changed, which is an indicator that the AIS is in a new calving cycle. The method in this article can accurately obtain three-dimensional information of the crevasses, find crevasses with abnormal changes in depth and width, and provide effective help for predicting the calving of the ice shelf. |
format |
Article in Journal/Newspaper |
author |
Guoyuan Li Jinquan Guo Liang Pei Shuaitai Zhang Xinming Tang Jiaqi Yao |
author_facet |
Guoyuan Li Jinquan Guo Liang Pei Shuaitai Zhang Xinming Tang Jiaqi Yao |
author_sort |
Guoyuan Li |
title |
Extraction and Analysis of the Three-Dimensional Features of Crevasses in the Amery Ice Shelf Based on ICESat-2 ATL06 Data |
title_short |
Extraction and Analysis of the Three-Dimensional Features of Crevasses in the Amery Ice Shelf Based on ICESat-2 ATL06 Data |
title_full |
Extraction and Analysis of the Three-Dimensional Features of Crevasses in the Amery Ice Shelf Based on ICESat-2 ATL06 Data |
title_fullStr |
Extraction and Analysis of the Three-Dimensional Features of Crevasses in the Amery Ice Shelf Based on ICESat-2 ATL06 Data |
title_full_unstemmed |
Extraction and Analysis of the Three-Dimensional Features of Crevasses in the Amery Ice Shelf Based on ICESat-2 ATL06 Data |
title_sort |
extraction and analysis of the three-dimensional features of crevasses in the amery ice shelf based on icesat-2 atl06 data |
publisher |
IEEE |
publishDate |
2021 |
url |
https://doi.org/10.1109/JSTARS.2021.3085302 https://doaj.org/article/3d447502f5154bb9b553039f72398e2a |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(71.000,71.000,-69.750,-69.750) |
geographic |
Amery Amery Ice Shelf |
geographic_facet |
Amery Amery Ice Shelf |
genre |
Amery Ice Shelf Ice Shelf |
genre_facet |
Amery Ice Shelf Ice Shelf |
op_source |
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 14, Pp 5796-5806 (2021) |
op_relation |
https://ieeexplore.ieee.org/document/9444795/ https://doaj.org/toc/2151-1535 2151-1535 doi:10.1109/JSTARS.2021.3085302 https://doaj.org/article/3d447502f5154bb9b553039f72398e2a |
op_doi |
https://doi.org/10.1109/JSTARS.2021.3085302 |
container_title |
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
container_volume |
14 |
container_start_page |
5796 |
op_container_end_page |
5806 |
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1766362770341625856 |