气候变化领域集成服务门户(CCPortal): Climate-Driven Variability in Runoff Erosion Encoded in Stream Network Geometry

CCPortal

DOI	10.1029/2020GL091777
	Climate-Driven Variability in Runoff Erosion Encoded in Stream Network Geometry
	Getraer A.; Maloof A.C.
发表日期	2021
ISSN	0094-8276
卷号	48 期号:3
英文摘要	Climate signatures recorded in the geometry of branching streams provide insight into climate and landscape histories on Earth and other planetary bodies. Recent findings establish that branching angles are narrower and stream profiles are straighter in more arid climates. However, these two observations have been attributed to different mechanisms. Here we demonstrate that for US watersheds the difference in slope between confluent streams increases with humidity, and streams with a greater difference in slope tend to branch at wider angles. Our observations suggest a branching angle endmember of 90° when stream slopes are most different. Using a simple model of runoff erosion, we show how this variation in relative stream slopes can be explained by a shift in streamflow accumulation across climate regimes. These findings connect previously observed climate signatures in branching angles and stream profiles, suggesting that both record the same control of aridity on surface flow. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Earth (planet); Erosion; Network coding; Runoff; Branching angles; Climate regime; Climate signatures; Different mechanisms; On-surface flow; Planetary bodies; Simple modeling; Stream networks; Climate models
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/169219
作者单位	Department of Geosciences, Princeton University, Princeton, NJ, United States
推荐引用方式 GB/T 7714	Getraer A.,Maloof A.C.. Climate-Driven Variability in Runoff Erosion Encoded in Stream Network Geometry[J],2021,48(3).
APA	Getraer A.,&Maloof A.C..(2021).Climate-Driven Variability in Runoff Erosion Encoded in Stream Network Geometry.Geophysical Research Letters,48(3).
MLA	Getraer A.,et al."Climate-Driven Variability in Runoff Erosion Encoded in Stream Network Geometry".Geophysical Research Letters 48.3(2021).