气候变化领域集成服务门户(CCPortal): Ice loss in the Northeastern Tibetan Plateau permafrost as seen by 16 yr of ESA SAR missions

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DOI	10.1016/j.epsl.2020.116404
	Ice loss in the Northeastern Tibetan Plateau permafrost as seen by 16 yr of ESA SAR missions
	Daout S.; Dini B.; Haeberli W.; Doin M.-P.; Parsons B.
发表日期	2020
ISSN	0012821X
卷号	545
英文摘要	InSAR time series of surface deformation from 16 yr of Envisat (2003-2011) and Sentinel-1 (2014-2019) ESA satellite radar measurements have been constructed to characterise spatial and temporal dynamics of ground deformation over an 80,000 km2 area in the permafrost of the northeastern Tibetan Plateau. The regional deformation maps encompass various types of periglacial landforms and show that seasonal thaw effects are controlled by the sediment type and local topography. High seasonal ground movements are concentrated on shallow slopes and poor-drainage areas in unconsolidated, frost-susceptible and fine-grained sediments within glacier outwash plains, braided stream plains, alluvial deposits or floodplains. Fast subsidence due to thaw settlement takes place during June/July while frost heave is intense during December/January when two-sided freezing of pore water under pressure causes prolonged ice segregation near the permafrost table. The analysis reveals pervasive subsidence of the ground of up to ∼2 cm/yr, and increasing by a factor of 2 to 5 from 2003 to today, in high-relief and well-drained areas. The findings suggest that seasonal thaw increasingly affects ice-rich layers at the permafrost table, as well as high-rates of widespread mass movements of non-consolidated sediments, the latter amplified by an increase of effects from frost heave/thaw settlement. © 2020 Elsevier B.V.
关键词	freeze/thaw cycles InSAR time series Northeast Tibet Permafrost degradation solifluction
英文关键词	Deformation; Frost effects; Geodetic satellites; Landforms; Permafrost; Radar measurement; Sediments; Subsidence; Synthetic aperture radar; Thawing; Topography; Alluvial deposits; Fine-grained sediment; Ground deformations; Northeastern tibetan plateaux; Permafrost table; Regional deformations; Surface deformation; Temporal dynamics; Ice; deformation; fine grained sediment; glacier; periglacial landform; permafrost; satellite mission; spatial variation; synthetic aperture radar; temporal variation; topographic effect; China; Qinghai-Xizang Plateau
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202556
作者单位	COMET, Department of Earth Sciences, University of Oxford, United Kingdom; School of Environmental Sciences, University of East Anglia, United Kingdom; Department of Geography, University of Zurich, Switzerland; Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, Grenoble, 38000, France
推荐引用方式 GB/T 7714	Daout S.,Dini B.,Haeberli W.,et al. Ice loss in the Northeastern Tibetan Plateau permafrost as seen by 16 yr of ESA SAR missions[J],2020,545.
APA	Daout S.,Dini B.,Haeberli W.,Doin M.-P.,&Parsons B..(2020).Ice loss in the Northeastern Tibetan Plateau permafrost as seen by 16 yr of ESA SAR missions.Earth and Planetary Science Letters,545.
MLA	Daout S.,et al."Ice loss in the Northeastern Tibetan Plateau permafrost as seen by 16 yr of ESA SAR missions".Earth and Planetary Science Letters 545(2020).