气候变化领域集成服务门户(CCPortal): Permafrost Ground Ice Melting and Deformation Time Series Revealed by Sentinel-1 InSAR in the Tanggula Mountain Region on the Tibetan Plateau

CCPortal

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 (通讯作者)，Nanjing Univ Informat Sci & Technol NUIST, Sch Geog Sci, Nanjing 210044, Peoples R China. ; Zhao, L (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryosphere Sci, Cryosphere Res Stn Qinghai Xizang Plateau, Lanzhou 730000, Peoples R China.
发表日期	2022
EISSN	2072-4292
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.
关键词	WESTERN ARCTIC COAST THAW SUBSIDENCE SAR INTERFEROMETRY CLIMATE-CHANGE DISPLACEMENT ISLAND LAYER DESERTIFICATION ALGORITHM EROSION
英文关键词	deformation curve; SBAS-InSAR; thaw subsidence; permafrost; ground ice; Mt; Geladandong
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000761415400001
来源期刊	REMOTE SENSING
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254599
作者单位	[Wang, Lingxiao; Zhao, Lin; Wang, Chong; Li, Yan] Nanjing Univ Informat Sci & Technol NUIST, Sch Geog Sci, Nanjing 210044, Peoples R China; [Zhao, Lin; Zhou, Huayun; Liu, Shibo; Du, Erji; Zou, Defu; Liu, Guangyue] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryosphere Sci, Cryosphere Res Stn Qinghai Xizang Plateau, Lanzhou 730000, Peoples R China; [Zhou, Huayun; Liu, Shibo] Univ Chinese Acad Sci, Beijing 100864, Peoples R China
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]. 中国科学院西北生态环境资源研究院,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).