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| DOI | 10.1002/ppp.2229 |
| Causes and Processes of Thermo-Erosional Gully Initiation Near Tiksi Settlement, Arctic Eastern Siberia | |
| 发表日期 | 2024 |
| ISSN | 1045-6740 |
| EISSN | 1099-1530 |
| 英文摘要 | Climatic and environmental change is leading to increased frequency and intensity of permafrost degradation processes; however, our knowledge of their mechanisms and rate is still limited. We examined structure of deposits, surface topography, and weather conditions during the initiation of a thermo-erosion gully in eastern Siberia and monitored its changes between 2020 and 2022. The initiation of the gully was caused by a combination of processes: (1) the catchment area of the gully was artificially increased several decades ago as a result of the interception of runoff by the winter road; (2) ice-wedge degradation led to surface runoff concentration above the gully head, while a large volume of ground ice remained in other parts of the slope, and frost cracking continued; (3) the entry of water into frost cracks formed underground tunnels; and (4) high air temperatures and heavy rainfall immediately before the gully appearance resulted in the expansion of the tunnels and collapse of their roof. In 2 years, the volume of the gully reached 1000 m3; at least 40% of that volume consists of ground ice. The gully development did not significantly change the water chemistry due to significant water freshening caused by melting of ground ice. |
| 英文关键词 | arctic hydrology; climate change; ice wedges; permafrost; thermal erosion; tunnel ice |
| 语种 | 英语 |
| WOS研究方向 | Physical Geography ; Geology |
| WOS类目 | Geography, Physical ; Geology |
| WOS记录号 | WOS:001228752700001 |
| 来源期刊 | PERMAFROST AND PERIGLACIAL PROCESSES
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/287640 |
| 作者单位 | Lomonosov Moscow State University; Russian Academy of Sciences; Melnikov Permafrost Institute, Siberian Branch of the RAS; Pacific Geographical Institute of the Far Eastern Branch of the Russian Academy of Sciences; Russian Academy of Sciences |
| 推荐引用方式 GB/T 7714 | . Causes and Processes of Thermo-Erosional Gully Initiation Near Tiksi Settlement, Arctic Eastern Siberia[J],2024. |
| APA | (2024).Causes and Processes of Thermo-Erosional Gully Initiation Near Tiksi Settlement, Arctic Eastern Siberia.PERMAFROST AND PERIGLACIAL PROCESSES. |
| MLA | "Causes and Processes of Thermo-Erosional Gully Initiation Near Tiksi Settlement, Arctic Eastern Siberia".PERMAFROST AND PERIGLACIAL PROCESSES (2024). |
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