气候变化领域集成服务门户(CCPortal): Arctic soil patterns analogous to fluid instabilities

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DOI	10.1073/PNAS.2101255118
	Arctic soil patterns analogous to fluid instabilities
	Glade R.C.; Fratkin M.M.; Pouragha M.; Seiphoori A.; Rowland J.C.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:21
英文摘要	Slow-moving arctic soils commonly organize into striking large-scale spatial patterns called solifluction terraces and lobes. Although these features impact hillslope stability, carbon storage and release, and landscape response to climate change, no mechanistic explanation exists for their formation. Everyday fluids-such as paint dripping down walls-produce markedly similar fingering patterns resulting from competition between viscous and cohesive forces. Here we use a scaling analysis to show that soil cohesion and hydrostatic effects can lead to similar large-scale patterns in arctic soils. A large dataset of high-resolution solifluction lobe spacing and morphology across Norway supports theoretical predictions and indicates a newly observed climatic control on solifluction dynamics and patterns. Our findings provide a quantitative explanation of a common pattern on Earth and other planets, illuminating the importance of cohesive forces in landscape dynamics. These patterns operate at length and time scales previously unrecognized, with implications toward understanding fluid-solid dynamics in particulate systems with complex rheology. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Climate; Fluid instabilities; Granular fingering; Periglacial; Solifluction
语种	英语
scopus关键词	Arctic; article; astronomy; climate; flow kinetics; Norway; prediction; quantitative analysis; soil
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238549
作者单位	Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM 87545, United States; Department of Civil and Environmental Engineering, Carleton University, Ottawa, ON K1S 5B6, Canada; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
推荐引用方式 GB/T 7714	Glade R.C.,Fratkin M.M.,Pouragha M.,et al. Arctic soil patterns analogous to fluid instabilities[J],2021,118(21).
APA	Glade R.C.,Fratkin M.M.,Pouragha M.,Seiphoori A.,&Rowland J.C..(2021).Arctic soil patterns analogous to fluid instabilities.Proceedings of the National Academy of Sciences of the United States of America,118(21).
MLA	Glade R.C.,et al."Arctic soil patterns analogous to fluid instabilities".Proceedings of the National Academy of Sciences of the United States of America 118.21(2021).