干旱区生态环境知识资源中心(Arid): Viscous creep of ice-rich permafrost debris in a recently uncovered proglacial area in the Tianshan Mountains, China

Arid

DOI	10.1016/j.accre.2022.05.005
	Viscous creep of ice-rich permafrost debris in a recently uncovered proglacial area in the Tianshan Mountains, China
	Zhou, Yu; LI, Guo-Yu; Jin, Hui-Jun; Marchenko, Sergey S.; Ma, Wei; Du, Qing-Song; Li, Jin-Ming; Chen, Dun
通讯作者	Li, GY
来源期刊	ADVANCES IN CLIMATE CHANGE RESEARCH
ISSN	1674-9278
出版年	2022
卷号	13 期号:4 页码:540-553
英文摘要	Since the Little Ice Age and as a consequence of climate warming, many recently deglaciated forefields have become and will continue to evolve into large ice-debris complexes exposed to periglacial processes and environment. Such transitional processes have significant implications for geomorphologic shaping and water supply for the downstream communities, especially in arid regions, but our understanding of their evolutionary processes and their potential geomorphic and hydrological impacts is still limited. A landform transition from partly debris-covered glaciers to ice-rich permafrost debris undergoing slow viscous creep was revealed in the Aerzailaikunai Valley in the eastern Tianshan Mountains in China based on the results of in-situ observations and measurements (boreholes, ground temperature monitoring, electrical resistivity tomography surveys, and continuous global positioning system measurements, among others). The internal structure of ice-till mixture contains pure ice layers, supersaturated frozen sands with ice lenses, and ice-bearing blocks with maximum volumetric contents of heterogeneous ice at 35%-60%. Beneath an 1.5-m-thick active layer, permafrost reached far into the underlying bedrock with the mean annual ground temperature of -2.1 degrees C at the depth of 20 m. The higher surface velocities (with an accumulative displacement of 65 mm from October 2019 to May 2020) and extremely high electrical resistivity (several million U m) of the debris-covered glacier margin were in sharp contrast to those of the progressively stabilizing ground surface (up to 16 mm) and the lower zones with relatively smaller electrical resistivity (several thousand U m). Combined with the borehole stratigraphy (higher rock content), monitored ground temperatures (permafrost environment), lower electrical resistance (ice-rich moraine), and continuous global positioning system results (viscous creeping), this study documents a transition from glacial to periglacial conditions, materials and processes characteristic of cold-dry ice-clad mountains, and reinforces the theory of the transition from debris-covered glaciers into morainically originated rock glaciers.
英文关键词	Alpine permafrost Viscous creep Debris-covered glacier margins Climate warming Landform transition Evolution of rock glacier
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:000860713200001
WOS关键词	ROCK GLACIERS ; INTERNAL STRUCTURE ; TIEN-SHAN ; PERIGLACIAL PROCESSES ; CENTRAL ANDES ; CLIMATE ; EVOLUTION ; DYNAMICS ; ALPS ; MOVEMENTS
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/391549
推荐引用方式 GB/T 7714	Zhou, Yu,LI, Guo-Yu,Jin, Hui-Jun,et al. Viscous creep of ice-rich permafrost debris in a recently uncovered proglacial area in the Tianshan Mountains, China[J],2022,13(4):540-553.
APA	Zhou, Yu.,LI, Guo-Yu.,Jin, Hui-Jun.,Marchenko, Sergey S..,Ma, Wei.,...&Chen, Dun.(2022).Viscous creep of ice-rich permafrost debris in a recently uncovered proglacial area in the Tianshan Mountains, China.ADVANCES IN CLIMATE CHANGE RESEARCH,13(4),540-553.
MLA	Zhou, Yu,et al."Viscous creep of ice-rich permafrost debris in a recently uncovered proglacial area in the Tianshan Mountains, China".ADVANCES IN CLIMATE CHANGE RESEARCH 13.4(2022):540-553.