气候变化领域集成服务门户(CCPortal): Topographic stress control on bedrock landslide size

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DOI	10.1038/s41561-021-00739-8
	Topographic stress control on bedrock landslide size
	Li G.K.; Moon S.
发表日期	2021
ISSN	17520894
起始页码	307
结束页码	313
卷号	14 期号:5
英文摘要	Landslides are a major natural hazard and act as a primary driver of erosion, chemical weathering and organic carbon transfer in mountain ranges. Evaluating the impact of landslides on Earth systems requires knowledge about the controls on their size, which are not well understood. Here we show that topographic stress, resulting from the interaction between tectonic stress and topography, influences bedrock landslide size at landscape scales by modulating the subsurface material strength through fracturing and weathering. Using a three-dimensional topographic stress model, we characterize the spatial pattern of subsurface open-fracture zones in a crystalline-rock terrain of the eastern Tibetan mountains. Then, we compare the predicted open-fracture zones with 982 mapped bedrock landslides. The results show that areas with deeper subsurface open-fracture zones tend to accommodate larger landslides. This is probably due to the influences of topographically induced fractures on the material strength and groundwater flow paths and rates. We conclude that the extent of hillslope failure depends on both distant tectonic forces and local topography, which has implications for hazard mitigation, landscape evolution and the global carbon cycle. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	bedrock; carbon cycle; chemical weathering; groundwater flow; landscape evolution; topographic effect
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206924
作者单位	Department of Earth, Planetary, and Space Sciences, University of California Los Angeles, Los Angeles, CA, United States; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States
推荐引用方式 GB/T 7714	Li G.K.,Moon S.. Topographic stress control on bedrock landslide size[J],2021,14(5).
APA	Li G.K.,&Moon S..(2021).Topographic stress control on bedrock landslide size.Nature Geoscience,14(5).
MLA	Li G.K.,et al."Topographic stress control on bedrock landslide size".Nature Geoscience 14.5(2021).