ANALYSIS OF OVERESTIMATION IN HISTORICAL ICE FLOW VELOCITY MAPS IN WESTERN PACIFIC OCEAN SECTOR, ANTARCTICA
High accuracy reconstruction of historical ice flow velocity fields is crucial in mass balance research of the Antarctic Ice Sheet by utilizing the input-output approach. A historical flow velocity of the Western Pacific Ocean sector region of East Antarctica from 1963 to 1989 was mapped and then co...
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Online Access: | https://doi.org/10.5194/isprs-archives-XLIII-B3-2022-757-2022 https://doaj.org/article/c6c8ea700a5a488888f5aebb0b479718 |
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ftdoajarticles:oai:doaj.org/article:c6c8ea700a5a488888f5aebb0b479718 2023-05-15T13:57:41+02:00 ANALYSIS OF OVERESTIMATION IN HISTORICAL ICE FLOW VELOCITY MAPS IN WESTERN PACIFIC OCEAN SECTOR, ANTARCTICA S. Ge Y. Cheng R. Li H. Cui Z. Yu T. Chang S. Luo Z. Li G. Li A. Zhao X. Yuan Y. Li M. Xia X. Wang G. Qiao 2022-05-01T00:00:00Z https://doi.org/10.5194/isprs-archives-XLIII-B3-2022-757-2022 https://doaj.org/article/c6c8ea700a5a488888f5aebb0b479718 EN eng Copernicus Publications https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLIII-B3-2022/757/2022/isprs-archives-XLIII-B3-2022-757-2022.pdf https://doaj.org/toc/1682-1750 https://doaj.org/toc/2194-9034 doi:10.5194/isprs-archives-XLIII-B3-2022-757-2022 1682-1750 2194-9034 https://doaj.org/article/c6c8ea700a5a488888f5aebb0b479718 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XLIII-B3-2022, Pp 757-763 (2022) Technology T Engineering (General). Civil engineering (General) TA1-2040 Applied optics. Photonics TA1501-1820 article 2022 ftdoajarticles https://doi.org/10.5194/isprs-archives-XLIII-B3-2022-757-2022 2022-12-30T21:46:41Z High accuracy reconstruction of historical ice flow velocity fields is crucial in mass balance research of the Antarctic Ice Sheet by utilizing the input-output approach. A historical flow velocity of the Western Pacific Ocean sector region of East Antarctica from 1963 to 1989 was mapped and then corrected for its velocity overestimation. In this study, we analyzed the spatial distribution of the corrected values, and further assessed the relationship between the corrected values and related factors including timespan of image pairs, ice flow velocity, the spatial acceleration of ice flow velocity, and surface slope. The results indicate that the corrected ice flow velocity points are mostly dispersed between a buffer 25 km upstream and a buffer 25 km downstream the grounding line, with the largest mean value emerging in the region between the grounding line and its 25 km downstream. The corrected values exhibit linear correlation with three conditions: 1) when the ice flow velocity range is 0 – 1586 m/y, 2) spatial acceleration is 0 – 69 (m/y)/km, and 3) the slope is 0 – 1.95 degrees and the R 2 is higher than 0.7. However, the correlation between timespan and corrected values is not obvious. The corrected values for the floating region have a greater linear correlation with all three factors than the inland region. Ice flow velocity, spatial acceleration, and surface slope all have an influence on the distribution of the corrected values of the reconstructed historical ice flow velocity maps, and may further affect the assessment of the mass balance of the Antarctic Ice Sheet. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic East Antarctica Pacific The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B3-2022 757 763 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Technology T Engineering (General). Civil engineering (General) TA1-2040 Applied optics. Photonics TA1501-1820 |
spellingShingle |
Technology T Engineering (General). Civil engineering (General) TA1-2040 Applied optics. Photonics TA1501-1820 S. Ge Y. Cheng R. Li H. Cui Z. Yu T. Chang S. Luo Z. Li G. Li A. Zhao X. Yuan Y. Li M. Xia X. Wang G. Qiao ANALYSIS OF OVERESTIMATION IN HISTORICAL ICE FLOW VELOCITY MAPS IN WESTERN PACIFIC OCEAN SECTOR, ANTARCTICA |
topic_facet |
Technology T Engineering (General). Civil engineering (General) TA1-2040 Applied optics. Photonics TA1501-1820 |
description |
High accuracy reconstruction of historical ice flow velocity fields is crucial in mass balance research of the Antarctic Ice Sheet by utilizing the input-output approach. A historical flow velocity of the Western Pacific Ocean sector region of East Antarctica from 1963 to 1989 was mapped and then corrected for its velocity overestimation. In this study, we analyzed the spatial distribution of the corrected values, and further assessed the relationship between the corrected values and related factors including timespan of image pairs, ice flow velocity, the spatial acceleration of ice flow velocity, and surface slope. The results indicate that the corrected ice flow velocity points are mostly dispersed between a buffer 25 km upstream and a buffer 25 km downstream the grounding line, with the largest mean value emerging in the region between the grounding line and its 25 km downstream. The corrected values exhibit linear correlation with three conditions: 1) when the ice flow velocity range is 0 – 1586 m/y, 2) spatial acceleration is 0 – 69 (m/y)/km, and 3) the slope is 0 – 1.95 degrees and the R 2 is higher than 0.7. However, the correlation between timespan and corrected values is not obvious. The corrected values for the floating region have a greater linear correlation with all three factors than the inland region. Ice flow velocity, spatial acceleration, and surface slope all have an influence on the distribution of the corrected values of the reconstructed historical ice flow velocity maps, and may further affect the assessment of the mass balance of the Antarctic Ice Sheet. |
format |
Article in Journal/Newspaper |
author |
S. Ge Y. Cheng R. Li H. Cui Z. Yu T. Chang S. Luo Z. Li G. Li A. Zhao X. Yuan Y. Li M. Xia X. Wang G. Qiao |
author_facet |
S. Ge Y. Cheng R. Li H. Cui Z. Yu T. Chang S. Luo Z. Li G. Li A. Zhao X. Yuan Y. Li M. Xia X. Wang G. Qiao |
author_sort |
S. Ge |
title |
ANALYSIS OF OVERESTIMATION IN HISTORICAL ICE FLOW VELOCITY MAPS IN WESTERN PACIFIC OCEAN SECTOR, ANTARCTICA |
title_short |
ANALYSIS OF OVERESTIMATION IN HISTORICAL ICE FLOW VELOCITY MAPS IN WESTERN PACIFIC OCEAN SECTOR, ANTARCTICA |
title_full |
ANALYSIS OF OVERESTIMATION IN HISTORICAL ICE FLOW VELOCITY MAPS IN WESTERN PACIFIC OCEAN SECTOR, ANTARCTICA |
title_fullStr |
ANALYSIS OF OVERESTIMATION IN HISTORICAL ICE FLOW VELOCITY MAPS IN WESTERN PACIFIC OCEAN SECTOR, ANTARCTICA |
title_full_unstemmed |
ANALYSIS OF OVERESTIMATION IN HISTORICAL ICE FLOW VELOCITY MAPS IN WESTERN PACIFIC OCEAN SECTOR, ANTARCTICA |
title_sort |
analysis of overestimation in historical ice flow velocity maps in western pacific ocean sector, antarctica |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/isprs-archives-XLIII-B3-2022-757-2022 https://doaj.org/article/c6c8ea700a5a488888f5aebb0b479718 |
geographic |
Antarctic The Antarctic East Antarctica Pacific |
geographic_facet |
Antarctic The Antarctic East Antarctica Pacific |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
op_source |
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XLIII-B3-2022, Pp 757-763 (2022) |
op_relation |
https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLIII-B3-2022/757/2022/isprs-archives-XLIII-B3-2022-757-2022.pdf https://doaj.org/toc/1682-1750 https://doaj.org/toc/2194-9034 doi:10.5194/isprs-archives-XLIII-B3-2022-757-2022 1682-1750 2194-9034 https://doaj.org/article/c6c8ea700a5a488888f5aebb0b479718 |
op_doi |
https://doi.org/10.5194/isprs-archives-XLIII-B3-2022-757-2022 |
container_title |
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
container_volume |
XLIII-B3-2022 |
container_start_page |
757 |
op_container_end_page |
763 |
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1766265493828665344 |