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| 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 Y.; Li G.-Y.; Jin H.-J.; Marchenko S.S.; Ma W.; Du Q.-S.; Li J.-M.; Chen D. | |
| 发表日期 | 2022 |
| ISSN | 1674-9278 |
| 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 °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 Ω 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 Ω 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. © 2022 The Authors |
| 英文关键词 | Alpine permafrost; Climate warming; Debris-covered glacier margins; Evolution of rock glacier; Landform transition; Viscous creep |
| 语种 | 英语 |
| 来源期刊 | Advances in Climate Change Research
 |
| 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/262091 |
| 作者单位 | State Key Laboratory of Frozen Soils Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Da Xing'anling Observation and Research Station of Frozen-ground Engineering and Environment, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Jagdaqi, 165000, China; School of Civil Engineering and Institute of Cold Regions Science and Engineering, Northeast Forestry University, Harbin, 150040, China; Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK 99775, United States |
| 推荐引用方式 GB/T 7714 | Zhou Y.； Li G.-Y.； Jin H.-J.； Marchenko S.S.； Ma W.； Du Q.-S.； Li J.-M.； Chen D.. Viscous creep of ice-rich permafrost debris in a recently uncovered proglacial area in the Tianshan Mountains, China[J]. 中国科学院西北生态环境资源研究院,2022. |
| APA | Zhou Y.； Li G.-Y.； Jin H.-J.； Marchenko S.S.； Ma W.； Du Q.-S.； Li J.-M.； Chen D..(2022).Viscous creep of ice-rich permafrost debris in a recently uncovered proglacial area in the Tianshan Mountains, China.Advances in Climate Change Research. |
| MLA | Zhou Y.； Li G.-Y.； Jin H.-J.； Marchenko S.S.； Ma W.； Du Q.-S.； Li J.-M.； Chen D.."Viscous creep of ice-rich permafrost debris in a recently uncovered proglacial area in the Tianshan Mountains, China".Advances in Climate Change Research (2022). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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