干旱区生态环境知识资源中心(Arid): Investigating the Intra-Annual Dynamics of Kunlun Glacier in the West Kunlun Mountains, China, From Ascending and Descending Sentinel-1 SAR Observations

Arid

DOI	10.1109/JSTARS.2022.3142990
	Investigating the Intra-Annual Dynamics of Kunlun Glacier in the West Kunlun Mountains, China, From Ascending and Descending Sentinel-1 SAR Observations
	Shi, Yueling; Liu, Guoxiang; Wang, Xiaowen; Liu, Qiao; Shum, C. K.; Bao, Jiawen; Mao, Wenfei
通讯作者	Wang, XW (corresponding author)，Southwest Jiaotong Univ, Fac Geosci & Environm Engn, Dept Geoinformat & Surveying, Chengdu 611756, Peoples R China.
来源期刊	IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
ISSN	1939-1404
EISSN	2151-1535
出版年	2022
卷号	15 页码:1272-1282
英文摘要	Monitoring glacier dynamics is an effective approach for quantifying the response of the glaciers in cold arid mountainous areas to climate change. However, the quantification of short-term flow dynamics of the mountain glaciers in cold-dry climates has rarely been reported. This article investigated the intra-annual flow dynamics in terms of velocity and ice thickness changes on the Kunlun glacier, a mountain glacier in the cold-dry west Kunlun mountains, using spaceborne synthetic aperture radar (SAR) imagery. We applied the improved pixel-offset-tracking small-baseline-subset method (PO-SBAS) on ascending and descending Sentinel-1A SAR images acquired in 2017 and 2018 to estimate the three-dimensional (i.e., north-south, west-east, and vertical) velocity time series of the glacier. The vertical velocities were further decomposed into the surface-parallel-flow (SPF) and the nonsurface-parallel-flow (nSPF) components, which link glacier motion along glacier surface slope and internal ice deformation, respectively, to glacier thickness changes. Our findings show that the eastern branch of the glacier moved faster than the western branch. We inferred that a loss of ice thickness due to a previous surge on the western branch should be responsible for its slower flow. The nSPF rates are higher than the SPF rates in both branches, indicating that internal ice deformation primarily controls the changes in ice thickness. We also observed an apparent summer acceleration in the nSPF rates, which is likely caused by changes in subglacial hydrological conditions. This article highlights the potential uses of the improved PO-SBAS method of quantifying the flow dynamics of the glaciers in cold-dry mountain regions.
英文关键词	Radar polarimetry Three-dimensional displays Azimuth Synthetic aperture radar Time series analysis Surface treatment Ice thickness Glacier dynamics glacier thickness change Sentinel-1 SAR Kunlun glacier pixel-offset-tracking small-baseline-subset method (PO-SBAS)
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:000752012800001
WOS关键词	TIME-SERIES ; INTERFEROMETRY ; SHAN
WOS类目	Engineering, Electrical & Electronic ; Geography, Physical ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Engineering ; Physical Geography ; 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/2XILL650/376713
作者单位	[Shi, Yueling; Liu, Guoxiang; Wang, Xiaowen; Bao, Jiawen; Mao, Wenfei] Southwest Jiaotong Univ, Fac Geosci & Environm Engn, Dept Geoinformat & Surveying, Chengdu 611756, Peoples R China; [Liu, Qiao] Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China; [Shum, C. K.] Ohio State Univ, Sch Earth Sci, Div Geodet Sci, Columbus, OH 43220 USA; [Shum, C. K.] Chinese Acad Sci, Innovat Acad Precis Measurement Sci & Technol, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Shi, Yueling,Liu, Guoxiang,Wang, Xiaowen,et al. Investigating the Intra-Annual Dynamics of Kunlun Glacier in the West Kunlun Mountains, China, From Ascending and Descending Sentinel-1 SAR Observations[J],2022,15:1272-1282.
APA	Shi, Yueling.,Liu, Guoxiang.,Wang, Xiaowen.,Liu, Qiao.,Shum, C. K..,...&Mao, Wenfei.(2022).Investigating the Intra-Annual Dynamics of Kunlun Glacier in the West Kunlun Mountains, China, From Ascending and Descending Sentinel-1 SAR Observations.IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING,15,1272-1282.
MLA	Shi, Yueling,et al."Investigating the Intra-Annual Dynamics of Kunlun Glacier in the West Kunlun Mountains, China, From Ascending and Descending Sentinel-1 SAR Observations".IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING 15(2022):1272-1282.