Monitoring Regional-Scale Surface Deformation of the Continuous Permafrost in the Qinghai–Tibet Plateau with Time-Series InSAR Analysis
As an important indicator of permafrost degradation, surface deformation is often used to monitor the thawing and freezing process in the permafrost active layer. However, due to the large area of the continuous permafrost of the Qinghai–Tibet Plateau (QTP) and the large amount of data processed by...
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ftdoajarticles:oai:doaj.org/article:c0b10e73c95942998b0d44c0029c2dc4 2024-01-07T09:37:54+01:00 Monitoring Regional-Scale Surface Deformation of the Continuous Permafrost in the Qinghai–Tibet Plateau with Time-Series InSAR Analysis Zhida Xu Liming Jiang Fujun Niu Rui Guo Ronggang Huang Zhiwei Zhou Zhiping Jiao 2022-06-01T00:00:00Z https://doi.org/10.3390/rs14132987 https://doaj.org/article/c0b10e73c95942998b0d44c0029c2dc4 EN eng MDPI AG https://www.mdpi.com/2072-4292/14/13/2987 https://doaj.org/toc/2072-4292 doi:10.3390/rs14132987 2072-4292 https://doaj.org/article/c0b10e73c95942998b0d44c0029c2dc4 Remote Sensing, Vol 14, Iss 13, p 2987 (2022) Qinghai–Tibet Plateau (QTP) permafrost deformation time-series InSAR LiCSAR Science Q article 2022 ftdoajarticles https://doi.org/10.3390/rs14132987 2023-12-10T01:43:48Z As an important indicator of permafrost degradation, surface deformation is often used to monitor the thawing and freezing process in the permafrost active layer. However, due to the large area of the continuous permafrost of the Qinghai–Tibet Plateau (QTP) and the large amount of data processed by conventional time-series InSAR, previous studies have mostly focused on local area investigations, and regional characteristics of surface deformation of the continuous permafrost area on the QTP are still unclear. In this paper, we characterized surface deformation in space and time over the main continuous permafrost area on the QTP, by analyzing 11 ascending and 8 descending orbits of Sentinel-1 SAR data acquired between 2018 and 2021 with the time-series InSAR processing system LiCSAR. The reliability of the InSAR deformation results was verified by a combination of leveling measurement data, the intercomparison of overlapping area results, and field verification. The results show that the permafrost regions of the central QTP exhibited the most significant linear subsidence trend. The subsidence trend of permafrost on the QTP was mainly related to the thermal stability of permafrost, and the regions with larger subsidence rates were concentrated in sub-stable, transitional and unstable permafrost areas. We also found that, according to analysis of time-series displacement, the beginning and ending times of permafrost thawing were highly spatially heterogeneous, with the time of maximum thawing depth varying between mid-October and mid-November, which was probably attributed to the active layer thickness (ALT), water content in the active layer, and vegetation cover in these regions. This study is of great significance for understanding the changing trend of permafrost on the QTP under the background of climate change. In addition, this study also demonstrates that combination of Sentinel-1 SAR images with the LiCSAR system has significant potential for detecting permafrost deformation with high accuracy and high ... Article in Journal/Newspaper Active layer thickness permafrost Directory of Open Access Journals: DOAJ Articles Remote Sensing 14 13 2987 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Qinghai–Tibet Plateau (QTP) permafrost deformation time-series InSAR LiCSAR Science Q |
spellingShingle |
Qinghai–Tibet Plateau (QTP) permafrost deformation time-series InSAR LiCSAR Science Q Zhida Xu Liming Jiang Fujun Niu Rui Guo Ronggang Huang Zhiwei Zhou Zhiping Jiao Monitoring Regional-Scale Surface Deformation of the Continuous Permafrost in the Qinghai–Tibet Plateau with Time-Series InSAR Analysis |
topic_facet |
Qinghai–Tibet Plateau (QTP) permafrost deformation time-series InSAR LiCSAR Science Q |
description |
As an important indicator of permafrost degradation, surface deformation is often used to monitor the thawing and freezing process in the permafrost active layer. However, due to the large area of the continuous permafrost of the Qinghai–Tibet Plateau (QTP) and the large amount of data processed by conventional time-series InSAR, previous studies have mostly focused on local area investigations, and regional characteristics of surface deformation of the continuous permafrost area on the QTP are still unclear. In this paper, we characterized surface deformation in space and time over the main continuous permafrost area on the QTP, by analyzing 11 ascending and 8 descending orbits of Sentinel-1 SAR data acquired between 2018 and 2021 with the time-series InSAR processing system LiCSAR. The reliability of the InSAR deformation results was verified by a combination of leveling measurement data, the intercomparison of overlapping area results, and field verification. The results show that the permafrost regions of the central QTP exhibited the most significant linear subsidence trend. The subsidence trend of permafrost on the QTP was mainly related to the thermal stability of permafrost, and the regions with larger subsidence rates were concentrated in sub-stable, transitional and unstable permafrost areas. We also found that, according to analysis of time-series displacement, the beginning and ending times of permafrost thawing were highly spatially heterogeneous, with the time of maximum thawing depth varying between mid-October and mid-November, which was probably attributed to the active layer thickness (ALT), water content in the active layer, and vegetation cover in these regions. This study is of great significance for understanding the changing trend of permafrost on the QTP under the background of climate change. In addition, this study also demonstrates that combination of Sentinel-1 SAR images with the LiCSAR system has significant potential for detecting permafrost deformation with high accuracy and high ... |
format |
Article in Journal/Newspaper |
author |
Zhida Xu Liming Jiang Fujun Niu Rui Guo Ronggang Huang Zhiwei Zhou Zhiping Jiao |
author_facet |
Zhida Xu Liming Jiang Fujun Niu Rui Guo Ronggang Huang Zhiwei Zhou Zhiping Jiao |
author_sort |
Zhida Xu |
title |
Monitoring Regional-Scale Surface Deformation of the Continuous Permafrost in the Qinghai–Tibet Plateau with Time-Series InSAR Analysis |
title_short |
Monitoring Regional-Scale Surface Deformation of the Continuous Permafrost in the Qinghai–Tibet Plateau with Time-Series InSAR Analysis |
title_full |
Monitoring Regional-Scale Surface Deformation of the Continuous Permafrost in the Qinghai–Tibet Plateau with Time-Series InSAR Analysis |
title_fullStr |
Monitoring Regional-Scale Surface Deformation of the Continuous Permafrost in the Qinghai–Tibet Plateau with Time-Series InSAR Analysis |
title_full_unstemmed |
Monitoring Regional-Scale Surface Deformation of the Continuous Permafrost in the Qinghai–Tibet Plateau with Time-Series InSAR Analysis |
title_sort |
monitoring regional-scale surface deformation of the continuous permafrost in the qinghai–tibet plateau with time-series insar analysis |
publisher |
MDPI AG |
publishDate |
2022 |
url |
https://doi.org/10.3390/rs14132987 https://doaj.org/article/c0b10e73c95942998b0d44c0029c2dc4 |
genre |
Active layer thickness permafrost |
genre_facet |
Active layer thickness permafrost |
op_source |
Remote Sensing, Vol 14, Iss 13, p 2987 (2022) |
op_relation |
https://www.mdpi.com/2072-4292/14/13/2987 https://doaj.org/toc/2072-4292 doi:10.3390/rs14132987 2072-4292 https://doaj.org/article/c0b10e73c95942998b0d44c0029c2dc4 |
op_doi |
https://doi.org/10.3390/rs14132987 |
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Remote Sensing |
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14 |
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13 |
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2987 |
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1787422102732668928 |