Time-Series InSAR Monitoring of Permafrost Freeze-Thaw Seasonal Displacement over Qinghai–Tibetan Plateau Using Sentinel-1 Data

Permafrost is widely distributed in the Tibetan Plateau. Seasonal freeze–thaw cycles of permafrost result in upward and downward surface displacement. Multitemporal interferometric synthetic aperture radar (MT-InSAR) observations provide an effective method for monitoring permafrost displacement und...

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Published in:Remote Sensing
Main Authors: Xuefei Zhang, Hong Zhang, Chao Wang, Yixian Tang, Bo Zhang, Fan Wu, Jing Wang, Zhengjia Zhang
Format: Text
Language:English
Published: Multidisciplinary Digital Publishing Institute 2019
Subjects:
Online Access:https://doi.org/10.3390/rs11091000
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spelling ftmdpi:oai:mdpi.com:/2072-4292/11/9/1000/ 2023-08-20T04:09:11+02:00 Time-Series InSAR Monitoring of Permafrost Freeze-Thaw Seasonal Displacement over Qinghai–Tibetan Plateau Using Sentinel-1 Data Xuefei Zhang Hong Zhang Chao Wang Yixian Tang Bo Zhang Fan Wu Jing Wang Zhengjia Zhang agris 2019-04-26 application/pdf https://doi.org/10.3390/rs11091000 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/rs11091000 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 11; Issue 9; Pages: 1000 Tibetan Plateau MT-InSAR NSBAS seasonal displacements Text 2019 ftmdpi https://doi.org/10.3390/rs11091000 2023-07-31T22:13:44Z Permafrost is widely distributed in the Tibetan Plateau. Seasonal freeze–thaw cycles of permafrost result in upward and downward surface displacement. Multitemporal interferometric synthetic aperture radar (MT-InSAR) observations provide an effective method for monitoring permafrost displacement under difficult terrain and climatic conditions. In this study, a seasonal sinusoidal model-based new small baselines subset (NSBAS) chain was adopted to obtain a deformation time series. An experimental study was carried out using 33 scenes of Sentinel-1 data (S-1) from 28 November 2017 to 29 December 2018 with frequent revisit (12 days) observations. The spatial and temporal characteristics of the surface displacements variation combined with different types of surface land cover, elevation and surface temperature factors were analyzed. The results revealed that the seasonal changes observed in the time series of ground movements, induced by freeze–thaw cycles were observed on flat surfaces of sedimentary basins and mountainous areas with gentle slopes. The estimated seasonal oscillations ranged from 2 mm to 30 mm, which were smaller in Alpine deserts than in Alpine meadows. In particular, there were significant systematic differences in seasonal surface deformation between areas near mountains and sedimentary basins. It was also found that the time series of deformation was consistent with the variation of surface temperature. Based on soil moisture active/passive (SMAP) L4 surface and root zone soil moisture data, the deformation analysis influenced by soil moisture factors was also carried out. The comprehensive analysis of deformation results and auxiliary data (elevation, soil moisture and surface temperature et al.) provides important insights for the monitoring of the seasonal freeze-thaw cycles in the Tibetan Plateau. Text permafrost MDPI Open Access Publishing Remote Sensing 11 9 1000
institution Open Polar
collection MDPI Open Access Publishing
op_collection_id ftmdpi
language English
topic Tibetan Plateau
MT-InSAR
NSBAS
seasonal displacements
spellingShingle Tibetan Plateau
MT-InSAR
NSBAS
seasonal displacements
Xuefei Zhang
Hong Zhang
Chao Wang
Yixian Tang
Bo Zhang
Fan Wu
Jing Wang
Zhengjia Zhang
Time-Series InSAR Monitoring of Permafrost Freeze-Thaw Seasonal Displacement over Qinghai–Tibetan Plateau Using Sentinel-1 Data
topic_facet Tibetan Plateau
MT-InSAR
NSBAS
seasonal displacements
description Permafrost is widely distributed in the Tibetan Plateau. Seasonal freeze–thaw cycles of permafrost result in upward and downward surface displacement. Multitemporal interferometric synthetic aperture radar (MT-InSAR) observations provide an effective method for monitoring permafrost displacement under difficult terrain and climatic conditions. In this study, a seasonal sinusoidal model-based new small baselines subset (NSBAS) chain was adopted to obtain a deformation time series. An experimental study was carried out using 33 scenes of Sentinel-1 data (S-1) from 28 November 2017 to 29 December 2018 with frequent revisit (12 days) observations. The spatial and temporal characteristics of the surface displacements variation combined with different types of surface land cover, elevation and surface temperature factors were analyzed. The results revealed that the seasonal changes observed in the time series of ground movements, induced by freeze–thaw cycles were observed on flat surfaces of sedimentary basins and mountainous areas with gentle slopes. The estimated seasonal oscillations ranged from 2 mm to 30 mm, which were smaller in Alpine deserts than in Alpine meadows. In particular, there were significant systematic differences in seasonal surface deformation between areas near mountains and sedimentary basins. It was also found that the time series of deformation was consistent with the variation of surface temperature. Based on soil moisture active/passive (SMAP) L4 surface and root zone soil moisture data, the deformation analysis influenced by soil moisture factors was also carried out. The comprehensive analysis of deformation results and auxiliary data (elevation, soil moisture and surface temperature et al.) provides important insights for the monitoring of the seasonal freeze-thaw cycles in the Tibetan Plateau.
format Text
author Xuefei Zhang
Hong Zhang
Chao Wang
Yixian Tang
Bo Zhang
Fan Wu
Jing Wang
Zhengjia Zhang
author_facet Xuefei Zhang
Hong Zhang
Chao Wang
Yixian Tang
Bo Zhang
Fan Wu
Jing Wang
Zhengjia Zhang
author_sort Xuefei Zhang
title Time-Series InSAR Monitoring of Permafrost Freeze-Thaw Seasonal Displacement over Qinghai–Tibetan Plateau Using Sentinel-1 Data
title_short Time-Series InSAR Monitoring of Permafrost Freeze-Thaw Seasonal Displacement over Qinghai–Tibetan Plateau Using Sentinel-1 Data
title_full Time-Series InSAR Monitoring of Permafrost Freeze-Thaw Seasonal Displacement over Qinghai–Tibetan Plateau Using Sentinel-1 Data
title_fullStr Time-Series InSAR Monitoring of Permafrost Freeze-Thaw Seasonal Displacement over Qinghai–Tibetan Plateau Using Sentinel-1 Data
title_full_unstemmed Time-Series InSAR Monitoring of Permafrost Freeze-Thaw Seasonal Displacement over Qinghai–Tibetan Plateau Using Sentinel-1 Data
title_sort time-series insar monitoring of permafrost freeze-thaw seasonal displacement over qinghai–tibetan plateau using sentinel-1 data
publisher Multidisciplinary Digital Publishing Institute
publishDate 2019
url https://doi.org/10.3390/rs11091000
op_coverage agris
genre permafrost
genre_facet permafrost
op_source Remote Sensing; Volume 11; Issue 9; Pages: 1000
op_relation https://dx.doi.org/10.3390/rs11091000
op_rights https://creativecommons.org/licenses/by/4.0/
op_doi https://doi.org/10.3390/rs11091000
container_title Remote Sensing
container_volume 11
container_issue 9
container_start_page 1000
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