Comparison and analysis of CryoSat DEM and the several Antarctic DEM
Antarctica is covered by huge snow and ice, and its geological structure is bounded by the Trans-Antarctic Mountains, and is generally divided into the East Antarctic Shield and the West Antarctic Active Zone. Digital elevation model (DEM) is one of the important basic data to study the Antarctic ic...
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ftdoajarticles:oai:doaj.org/article:e0bc194856424c00bc73da59ed828c5b 2024-09-15T17:48:13+00:00 Comparison and analysis of CryoSat DEM and the several Antarctic DEM Wenli Yue Yusen Dong Abudula-Abudukadier Jingyue Cui Bangzheng Zhang 2021-05-01T00:00:00Z https://doi.org/10.19509/j.cnki.dzkq.2021.0315 https://doaj.org/article/e0bc194856424c00bc73da59ed828c5b ZH chi Editorial Department of Bulletin of Geological Science and Technology https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.2021.0315 https://doaj.org/toc/2096-8523 2096-8523 doi:10.19509/j.cnki.dzkq.2021.0315 https://doaj.org/article/e0bc194856424c00bc73da59ed828c5b 地质科技通报, Vol 40, Iss 3, Pp 219-227 (2021) antarctic geological structure digital elevation model horizontal error elevation difference Geology QE1-996.5 Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 article 2021 ftdoajarticles https://doi.org/10.19509/j.cnki.dzkq.2021.0315 2024-08-05T17:49:53Z Antarctica is covered by huge snow and ice, and its geological structure is bounded by the Trans-Antarctic Mountains, and is generally divided into the East Antarctic Shield and the West Antarctic Active Zone. Digital elevation model (DEM) is one of the important basic data to study the Antarctic ice sheet change. Obtaining elevation change information through the comparison of multi-period DEM is an important means to analyze the changes in the thickness and material balance of the Antarctic ice sheet. However, the horizontal and vertical errors between different types of DEM affect the accuracy of the analysis results. In this study, the horizontal error first eliminated by registration between DEMs, then elevation difference and standard deviation are calculated between CryoSat DEM and other DEMs, finally the temporal and spatial variation characteristics are evaluated. The results show that in the plane, the horizontal offset between TanDEM_X DEM and CryoSat DEM is the smallest, while that between ICESat DEM and CryoSat DEM is the largest. In the vertical direction, within the gradient range of 0° ~ 1°, the mean elevation difference between CryoSat DEM and TanDEM_X DEM is between 3.5 and 5.5 m, and the standard deviation is less than 18.0 m. The mean elevation difference between CryoSat DEM and Bamber 1km DEM is between -2.5 and +1.0 m, and the standard deviation is less than 24.2 m. The mean elevation difference between CryoSat DEM and ICESat DEM is between -25.0 and -1.0 m, and the standard deviation is less than 47.2 m. The mean elevation difference between CryoSat DEM and RAMPv2 DEM is between 1.3 and 3.2 m, and the standard deviation is less than 45.6 m. It is found that the internal elevation of Antarctic ice sheet increases, but the elevation of southwest ice sheet and southeast ice sheet decreases, and the southwest pole decreases obviously, while the elevation of Antarctic edge area decreases obviously. This study provides an important reference for global change research and Antarctic material ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Directory of Open Access Journals: DOAJ Articles |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Chinese |
topic |
antarctic geological structure digital elevation model horizontal error elevation difference Geology QE1-996.5 Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 |
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antarctic geological structure digital elevation model horizontal error elevation difference Geology QE1-996.5 Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 Wenli Yue Yusen Dong Abudula-Abudukadier Jingyue Cui Bangzheng Zhang Comparison and analysis of CryoSat DEM and the several Antarctic DEM |
topic_facet |
antarctic geological structure digital elevation model horizontal error elevation difference Geology QE1-996.5 Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 |
description |
Antarctica is covered by huge snow and ice, and its geological structure is bounded by the Trans-Antarctic Mountains, and is generally divided into the East Antarctic Shield and the West Antarctic Active Zone. Digital elevation model (DEM) is one of the important basic data to study the Antarctic ice sheet change. Obtaining elevation change information through the comparison of multi-period DEM is an important means to analyze the changes in the thickness and material balance of the Antarctic ice sheet. However, the horizontal and vertical errors between different types of DEM affect the accuracy of the analysis results. In this study, the horizontal error first eliminated by registration between DEMs, then elevation difference and standard deviation are calculated between CryoSat DEM and other DEMs, finally the temporal and spatial variation characteristics are evaluated. The results show that in the plane, the horizontal offset between TanDEM_X DEM and CryoSat DEM is the smallest, while that between ICESat DEM and CryoSat DEM is the largest. In the vertical direction, within the gradient range of 0° ~ 1°, the mean elevation difference between CryoSat DEM and TanDEM_X DEM is between 3.5 and 5.5 m, and the standard deviation is less than 18.0 m. The mean elevation difference between CryoSat DEM and Bamber 1km DEM is between -2.5 and +1.0 m, and the standard deviation is less than 24.2 m. The mean elevation difference between CryoSat DEM and ICESat DEM is between -25.0 and -1.0 m, and the standard deviation is less than 47.2 m. The mean elevation difference between CryoSat DEM and RAMPv2 DEM is between 1.3 and 3.2 m, and the standard deviation is less than 45.6 m. It is found that the internal elevation of Antarctic ice sheet increases, but the elevation of southwest ice sheet and southeast ice sheet decreases, and the southwest pole decreases obviously, while the elevation of Antarctic edge area decreases obviously. This study provides an important reference for global change research and Antarctic material ... |
format |
Article in Journal/Newspaper |
author |
Wenli Yue Yusen Dong Abudula-Abudukadier Jingyue Cui Bangzheng Zhang |
author_facet |
Wenli Yue Yusen Dong Abudula-Abudukadier Jingyue Cui Bangzheng Zhang |
author_sort |
Wenli Yue |
title |
Comparison and analysis of CryoSat DEM and the several Antarctic DEM |
title_short |
Comparison and analysis of CryoSat DEM and the several Antarctic DEM |
title_full |
Comparison and analysis of CryoSat DEM and the several Antarctic DEM |
title_fullStr |
Comparison and analysis of CryoSat DEM and the several Antarctic DEM |
title_full_unstemmed |
Comparison and analysis of CryoSat DEM and the several Antarctic DEM |
title_sort |
comparison and analysis of cryosat dem and the several antarctic dem |
publisher |
Editorial Department of Bulletin of Geological Science and Technology |
publishDate |
2021 |
url |
https://doi.org/10.19509/j.cnki.dzkq.2021.0315 https://doaj.org/article/e0bc194856424c00bc73da59ed828c5b |
genre |
Antarc* Antarctic Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet |
op_source |
地质科技通报, Vol 40, Iss 3, Pp 219-227 (2021) |
op_relation |
https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.2021.0315 https://doaj.org/toc/2096-8523 2096-8523 doi:10.19509/j.cnki.dzkq.2021.0315 https://doaj.org/article/e0bc194856424c00bc73da59ed828c5b |
op_doi |
https://doi.org/10.19509/j.cnki.dzkq.2021.0315 |
_version_ |
1810289377921728512 |