气候变化领域集成服务门户(CCPortal): Using InSAR for Surface Deformation Monitoring and Active Layer Thickness Retrieval in the Heihe River Basin on the Northeast Qinghai-Tibet Plateau

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DOI	10.1029/2022JF006782
	Using InSAR for Surface Deformation Monitoring and Active Layer Thickness Retrieval in the Heihe River Basin on the Northeast Qinghai-Tibet Plateau
	Peng, Sijia; Peng, Xiaoqing; Frauenfeld, Oliver W. W.; Yang, Guangshang; Tian, Weiwei; Tian, Jie; Ma, Jinhui
发表日期	2023
ISSN	2169-9003
EISSN	2169-9011
卷号	128 期号:4
英文摘要	In cold regions characterized by perennially frozen soil, climate warming has caused permafrost degradation, which is manifested by surface deformation and deepening of the active layer. Interferometric synthetic aperture radar (InSAR) is a common method to obtain large-scale surface deformation, especially in mountainous terrain where it is difficult to install a large number of monitoring sites. Here, we used Sentinel-1A SAR data acquired from March 2017 to March 2021 to monitor surface deformation and estimate active layer thickness (ALT) using two methods-temperature-based and soil moisture-based-in the permafrost regions of the Heihe River Basin on the northeast Qinghai-Tibetan Plateau. We find that the seasonal deformation amplitude ranges 10-60 mm, and the annual mean vertical deformation trend ranges from -40 to 30 mm/a. We verify the ALT estimates with observations and find that the method based on soil moisture has higher accuracy and is therefore more applicable in this particular study area. The ALT gradually decreases from the southeast to the northwest, ranging from 0.3 to 6.5 m, with an average value of 2.47 m. These results contribute to better quantifying the response of permafrost change and to understanding the spatial distribution of ALT on a large scale, serving as guidance for engineering and other applications.
关键词	permafrost surface deformation ALT InSAR Heihe River Basin
英文关键词	SOIL-MOISTURE; SAR INTERFEROMETRY; THERMOKARST LAKE; NEAR-SURFACE; RADAR; VARIABILITY; REGION
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:000968839400001
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283532
作者单位	Lanzhou University; Lanzhou University; Texas A&M University System; Texas A&M University College Station
推荐引用方式 GB/T 7714	Peng, Sijia,Peng, Xiaoqing,Frauenfeld, Oliver W. W.,et al. Using InSAR for Surface Deformation Monitoring and Active Layer Thickness Retrieval in the Heihe River Basin on the Northeast Qinghai-Tibet Plateau[J],2023,128(4).
APA	Peng, Sijia.,Peng, Xiaoqing.,Frauenfeld, Oliver W. W..,Yang, Guangshang.,Tian, Weiwei.,...&Ma, Jinhui.(2023).Using InSAR for Surface Deformation Monitoring and Active Layer Thickness Retrieval in the Heihe River Basin on the Northeast Qinghai-Tibet Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE,128(4).
MLA	Peng, Sijia,et al."Using InSAR for Surface Deformation Monitoring and Active Layer Thickness Retrieval in the Heihe River Basin on the Northeast Qinghai-Tibet Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE 128.4(2023).