干旱区生态环境知识资源中心(Arid): Permafrost Ground Ice Melting and Deformation Time Series Revealed by Sentinel-1 InSAR in the Tanggula Mountain Region on the Tibetan Plateau

Arid

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
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).