气候变化领域集成服务门户(CCPortal): Geomorphic and Sedimentary Effects of Modern Climate Change: Current and Anticipated Future Conditions in the Western United States

CCPortal

DOI	10.1029/2019RG000692
	Geomorphic and Sedimentary Effects of Modern Climate Change: Current and Anticipated Future Conditions in the Western United States
	East A.E.; Sankey J.B.
发表日期	2020
ISSN	87551209
卷号	58 期号:4
英文摘要	Hydroclimatic changes associated with global warming over the past 50 years have been documented widely, but physical landscape responses are poorly understood thus far. Detecting sedimentary and geomorphic signals of modern climate change presents challenges owing to short record lengths, difficulty resolving signals in stochastic natural systems, influences of land use and tectonic activity, long-lasting effects of individual extreme events, and variable connectivity in sediment-routing systems. We review existing literature to investigate the nature and extent of sedimentary and geomorphic responses to modern climate change, focusing on the western United States, a region with generally high relief and high sediment yield likely to be sensitive to climatic forcing. Based on fundamental geomorphic theory and empirical evidence from other regions, we anticipate climate-driven changes to slope stability, watershed sediment yields, fluvial morphology, and aeolian sediment mobilization in the western United States. We find evidence for recent climate-driven changes to slope stability and increased aeolian dune and dust activity, whereas changes in sediment yields and fluvial morphology have been linked more commonly to nonclimatic drivers thus far. Detecting effects of climate change will require better understanding how landscape response scales with disturbance, how lag times and hysteresis operate within sedimentary systems, and how to distinguish the relative influence and feedbacks of superimposed disturbances. The ability to constrain geomorphic and sedimentary response to rapidly progressing climate change has widespread implications for human health and safety, infrastructure, water security, economics, and ecosystem resilience. ©2020. The Authors.
英文关键词	climate change; extreme events; geomorphic change; landscape evolution
语种	英语
来源期刊	Reviews of Geophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/188070
作者单位	U.S. Geological Survey Pacific Coastal and Marine Science Center, Santa Cruz, CA, United States; U.S. Geological Survey Southwest Biological Science Center, Flagstaff, AZ, United States
推荐引用方式 GB/T 7714	East A.E.,Sankey J.B.. Geomorphic and Sedimentary Effects of Modern Climate Change: Current and Anticipated Future Conditions in the Western United States[J],2020,58(4).
APA	East A.E.,&Sankey J.B..(2020).Geomorphic and Sedimentary Effects of Modern Climate Change: Current and Anticipated Future Conditions in the Western United States.Reviews of Geophysics,58(4).
MLA	East A.E.,et al."Geomorphic and Sedimentary Effects of Modern Climate Change: Current and Anticipated Future Conditions in the Western United States".Reviews of Geophysics 58.4(2020).