Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.3390/rs14040811 |
Permafrost Ground Ice Melting and Deformation Time Series Revealed by Sentinel-1 InSAR in the Tanggula Mountain Region on the Tibetan Plateau | |
Wang, Lingxiao; Zhao, Lin; Zhou, Huayun; Liu, Shibo; Du, Erji; Zou, Defu; Liu, Guangyue; Wang, Chong; Li, Yan![]() | |
通讯作者 | Zhao, L |
来源期刊 | REMOTE SENSING
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EISSN | 2072-4292 |
出版年 | 2022 |
卷号 | 14期号:4 |
英文摘要 | In this study, we applied small baseline subset-interferometric synthetic aperture radar (SBAS-InSAR) to monitor the ground surface deformation from 2017 to 2020 in the permafrost region within an ~400 km x 230 km area covering the northern and southern slopes of Mt. Geladandong, Tanggula Mountains on the Tibetan Plateau. During SBAS-InSAR processing, we inverted the network of interferograms into a deformation time series using a weighted least square estimator without a preset deformation model. The deformation curves of various permafrost states in the Tanggula Mountain region were revealed in detail for the first time. The study region undergoes significant subsidence. Over the subsiding terrain, the average subsidence rate was 9.1 mm/a; 68.1% of its area had a subsidence rate between 5 and 20 mm/a, while just 0.7% of its area had a subsidence rate larger than 30 mm/a. The average peak-to-peak seasonal deformation was 19.7 mm. There is a weak positive relationship (~0.3) between seasonal amplitude (water storage in the active layer) and long-term deformation velocity (ground ice melting). By examining the deformation time series of subsiding terrain with different subsidence levels, we also found that thaw subsidence was not restricted to the summer and autumn thawing times but could last until the following winter, and in this circumstance, the winter uplift was greatly weakened. Two import indices for indicating permafrost deformation properties, i.e., long-term deformation trend and seasonal deformation magnitude, were extracted by direct calculation and model approximations of deformation time series and compared with each other. The comparisons showed that the long-term velocity by different calculations was highly consistent, but the intra-annual deformation magnitudes by the model approximations were larger than those of the intra-annual highest-lowest elevation difference. The findings improve the understanding of deformation properties in the degrading permafrost environment. |
英文关键词 | deformation curve SBAS-InSAR thaw subsidence permafrost ground ice Mt Geladandong |
类型 | Article |
语种 | 英语 |
开放获取类型 | gold |
收录类别 | SCI-E |
WOS记录号 | WOS:000761415400001 |
WOS关键词 | WESTERN ARCTIC COAST ; THAW SUBSIDENCE ; SAR INTERFEROMETRY ; CLIMATE-CHANGE ; DISPLACEMENT ; ISLAND ; LAYER ; DESERTIFICATION ; ALGORITHM ; EROSION |
WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology |
WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/376349 |
推荐引用方式 GB/T 7714 | Wang, Lingxiao,Zhao, Lin,Zhou, Huayun,et al. Permafrost Ground Ice Melting and Deformation Time Series Revealed by Sentinel-1 InSAR in the Tanggula Mountain Region on the Tibetan Plateau[J],2022,14(4). |
APA | Wang, Lingxiao.,Zhao, Lin.,Zhou, Huayun.,Liu, Shibo.,Du, Erji.,...&Li, Yan.(2022).Permafrost Ground Ice Melting and Deformation Time Series Revealed by Sentinel-1 InSAR in the Tanggula Mountain Region on the Tibetan Plateau.REMOTE SENSING,14(4). |
MLA | Wang, Lingxiao,et al."Permafrost Ground Ice Melting and Deformation Time Series Revealed by Sentinel-1 InSAR in the Tanggula Mountain Region on the Tibetan Plateau".REMOTE SENSING 14.4(2022). |
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