Increased Water Content in the Active Layer Revealed by Regional‐Scale InSAR and Independent Component Analysis on the Central Qinghai‐Tibet Plateau
Abstract Isolating seasonal deformation from Interferometric Synthetic Aperture Radar (InSAR) time‐series is critical to quantitative understanding the freeze‐thaw processes in permafrost regions. Physics‐ or statistics‐based approaches have been developed to extract seasonal deformation, yet both c...
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| Format: | Article |
| Language: | English |
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Wiley
2022-08-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2021GL097586 |
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| author | Jie Chen Tonghua Wu Lin Liu Wenyu Gong Simon Zwieback Defu Zou Xiaofan Zhu Guojie Hu Erji Du Xiaodong Wu Ren Li Sizhong Yang |
| author_facet | Jie Chen Tonghua Wu Lin Liu Wenyu Gong Simon Zwieback Defu Zou Xiaofan Zhu Guojie Hu Erji Du Xiaodong Wu Ren Li Sizhong Yang |
| author_sort | Jie Chen |
| collection | DOAJ |
| description | Abstract Isolating seasonal deformation from Interferometric Synthetic Aperture Radar (InSAR) time‐series is critical to quantitative understanding the freeze‐thaw processes in permafrost regions. Physics‐ or statistics‐based approaches have been developed to extract seasonal deformation, yet both constraining their evolution in time domain, and thus impeded the quantification of their amplitude variability especially over large scales. By applying Independent Component Analysis (ICA) on Sentinel‐1 InSAR measurements during 2015–2019 on the central Qinghai‐Tibet Plateau, we reveal that the averaged seasonal deformation is increasing with a linear trend of around 0.17 cm/year. The growing seasonal amplitude is attributed to an 8 cm increase of the Equivalent Water Thickness in the active layer. The results demonstrate the capability of ICA‐based decomposition on isolating freeze‐thaw‐related deformation from other components. The large‐scale spatial distribution of varied seasonal deformation can provide new insight into quantifying the water mass balance in vast permafrost regions. |
| format | Article |
| id | doaj-art-3dafc8395e3c47099bbdb188ca5ab7f5 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2022-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-3dafc8395e3c47099bbdb188ca5ab7f52025-08-20T02:12:53ZengWileyGeophysical Research Letters0094-82761944-80072022-08-014915n/an/a10.1029/2021GL097586Increased Water Content in the Active Layer Revealed by Regional‐Scale InSAR and Independent Component Analysis on the Central Qinghai‐Tibet PlateauJie Chen0Tonghua Wu1Lin Liu2Wenyu Gong3Simon Zwieback4Defu Zou5Xiaofan Zhu6Guojie Hu7Erji Du8Xiaodong Wu9Ren Li10Sizhong Yang11State Key Laboratory of Cryospheric Science Cryosphere Research Station on the Qinghai‐Tibet Plateau Northwest Institute of Eco‐Environment and Resources Chinese Academy of Sciences Lanzhou ChinaState Key Laboratory of Cryospheric Science Cryosphere Research Station on the Qinghai‐Tibet Plateau Northwest Institute of Eco‐Environment and Resources Chinese Academy of Sciences Lanzhou ChinaEarth System Science Programme Faculty of Science The Chinese University of Hong Kong Hong Kong SAR ChinaState Key Laboratory of Earthquake Dynamics Institute of Geology China Earthquake Administration Beijing ChinaGeophysical Institute University of Alaska Fairbanks Fairbanks AK USAState Key Laboratory of Cryospheric Science Cryosphere Research Station on the Qinghai‐Tibet Plateau Northwest Institute of Eco‐Environment and Resources Chinese Academy of Sciences Lanzhou ChinaState Key Laboratory of Cryospheric Science Cryosphere Research Station on the Qinghai‐Tibet Plateau Northwest Institute of Eco‐Environment and Resources Chinese Academy of Sciences Lanzhou ChinaState Key Laboratory of Cryospheric Science Cryosphere Research Station on the Qinghai‐Tibet Plateau Northwest Institute of Eco‐Environment and Resources Chinese Academy of Sciences Lanzhou ChinaState Key Laboratory of Cryospheric Science Cryosphere Research Station on the Qinghai‐Tibet Plateau Northwest Institute of Eco‐Environment and Resources Chinese Academy of Sciences Lanzhou ChinaState Key Laboratory of Cryospheric Science Cryosphere Research Station on the Qinghai‐Tibet Plateau Northwest Institute of Eco‐Environment and Resources Chinese Academy of Sciences Lanzhou ChinaState Key Laboratory of Cryospheric Science Cryosphere Research Station on the Qinghai‐Tibet Plateau Northwest Institute of Eco‐Environment and Resources Chinese Academy of Sciences Lanzhou ChinaState Key Laboratory of Cryospheric Science Cryosphere Research Station on the Qinghai‐Tibet Plateau Northwest Institute of Eco‐Environment and Resources Chinese Academy of Sciences Lanzhou ChinaAbstract Isolating seasonal deformation from Interferometric Synthetic Aperture Radar (InSAR) time‐series is critical to quantitative understanding the freeze‐thaw processes in permafrost regions. Physics‐ or statistics‐based approaches have been developed to extract seasonal deformation, yet both constraining their evolution in time domain, and thus impeded the quantification of their amplitude variability especially over large scales. By applying Independent Component Analysis (ICA) on Sentinel‐1 InSAR measurements during 2015–2019 on the central Qinghai‐Tibet Plateau, we reveal that the averaged seasonal deformation is increasing with a linear trend of around 0.17 cm/year. The growing seasonal amplitude is attributed to an 8 cm increase of the Equivalent Water Thickness in the active layer. The results demonstrate the capability of ICA‐based decomposition on isolating freeze‐thaw‐related deformation from other components. The large‐scale spatial distribution of varied seasonal deformation can provide new insight into quantifying the water mass balance in vast permafrost regions.https://doi.org/10.1029/2021GL097586permafrost ground deformationInSARactive layer water contentQinghai‐Tibet Plateauindependent component analysis |
| spellingShingle | Jie Chen Tonghua Wu Lin Liu Wenyu Gong Simon Zwieback Defu Zou Xiaofan Zhu Guojie Hu Erji Du Xiaodong Wu Ren Li Sizhong Yang Increased Water Content in the Active Layer Revealed by Regional‐Scale InSAR and Independent Component Analysis on the Central Qinghai‐Tibet Plateau Geophysical Research Letters permafrost ground deformation InSAR active layer water content Qinghai‐Tibet Plateau independent component analysis |
| title | Increased Water Content in the Active Layer Revealed by Regional‐Scale InSAR and Independent Component Analysis on the Central Qinghai‐Tibet Plateau |
| title_full | Increased Water Content in the Active Layer Revealed by Regional‐Scale InSAR and Independent Component Analysis on the Central Qinghai‐Tibet Plateau |
| title_fullStr | Increased Water Content in the Active Layer Revealed by Regional‐Scale InSAR and Independent Component Analysis on the Central Qinghai‐Tibet Plateau |
| title_full_unstemmed | Increased Water Content in the Active Layer Revealed by Regional‐Scale InSAR and Independent Component Analysis on the Central Qinghai‐Tibet Plateau |
| title_short | Increased Water Content in the Active Layer Revealed by Regional‐Scale InSAR and Independent Component Analysis on the Central Qinghai‐Tibet Plateau |
| title_sort | increased water content in the active layer revealed by regional scale insar and independent component analysis on the central qinghai tibet plateau |
| topic | permafrost ground deformation InSAR active layer water content Qinghai‐Tibet Plateau independent component analysis |
| url | https://doi.org/10.1029/2021GL097586 |
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