气候变化领域集成服务门户(CCPortal): Fluvial Channel Branching Enforces Threshold Relief

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DOI	10.1029/2020GL091464
	Fluvial Channel Branching Enforces Threshold Relief
	Cunningham M.T.; Kaplan M.R.
发表日期	2021
ISSN	0094-8276
卷号	48 期号:3
英文摘要	Relief within mountain belts appears to be limited to a threshold of 1,000–1,500 m. However, it remains unclear definitively where in the landscape this threshold is found. Here we use a new method of analysis, termed Progressive Hypsometry, to show that “threshold relief” is the typical relief of first-order fluvial catchments. The method tracks changes in the elevation frequency distribution (hypsometry) across nested catchments of all sizes. We find that self-similar nesting of fluvial catchments leads to quasi-scale invariance in hypsometry, such that the relief between any catchment's modal and outlet elevation (RMo, mode relief) falls into three groups: the two lower associated with steep upland subcatchments (RMo = 250–1,000 m) and the other with fluvial catchments, which span orders of magnitude in area but maintain an RMo of 1,000–1,500 m. We conclude that threshold relief is the maximum relief a first-order fluvial catchment can develop without branching. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Runoff; Fluvial channels; Frequency distributions; Method of analysis; Mountain belts; Orders of magnitude; Scale invariance; Self-similar; Subcatchments; Catchments
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169136
作者单位	Department of Earth Sciences, Dartmouth College, Hanover, NH, United States; Lamont-Doherty Earth Observatory of Columbia UniversityNY, United States; Department of Earth and Environmental Sciences, Columbia UniversityNY, United States
推荐引用方式 GB/T 7714	Cunningham M.T.,Kaplan M.R.. Fluvial Channel Branching Enforces Threshold Relief[J],2021,48(3).
APA	Cunningham M.T.,&Kaplan M.R..(2021).Fluvial Channel Branching Enforces Threshold Relief.Geophysical Research Letters,48(3).
MLA	Cunningham M.T.,et al."Fluvial Channel Branching Enforces Threshold Relief".Geophysical Research Letters 48.3(2021).