气候变化领域集成服务门户(CCPortal): Morphology; Development; and Sediment Dynamics of Elongating Linear Dunes on Mars

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DOI	10.1029/2020GL088456
	Morphology; Development; and Sediment Dynamics of Elongating Linear Dunes on Mars
	Davis J.M.; Banham S.G.; Grindrod P.M.; Boazman S.J.; Balme M.R.; Bristow C.S.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:12
英文摘要	Linear dunes occur on planetary surfaces, including Earth, Mars, and Titan, yet their dynamics are poorly understood. Recent studies of terrestrial linear dunes suggest they migrate by elongation only in supply-limited environments. Here, we investigate elongating linear dunes in the Hellespontus Montes region of Mars which are morphologically similar to terrestrial systems. Multitemporal, high-resolution orbital images show these linear dunes migrate by elongation only and that the fixed sediment source of the dunes probably restricts any lateral migration. Some linear dunes maintain their along-length volume and elongate at rates comparable to adjacent barchans, whereas those which decrease in volume show no elongation, suggesting they are near steady state, matching morphometric predictions. Limited sediment supply may restrict Martian linear dunes to several kilometers, significantly shorter than many terrestrial linear dunes. Our results demonstrate the close similarities in dune dynamics across the two planetary surfaces. ©2020. The Authors.
英文关键词	Dynamics; Morphology; Orbits; Sediments; Decrease in volume; High resolution; Lateral migration; Planetary surfaces; Sediment dynamic; Sediment sources; Sediment supply; Terrestrial systems; Elongation; dune field; geomorphology; Mars; morphometry; planetary landform; sediment transport; terrestrial environment; Titan
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/170230
作者单位	Department of Earth Sciences, Natural History Museum, London, United Kingdom; Department of Earth Science and Engineering, Imperial College London, London, United Kingdom; Department of Earth Sciences, University College London, London, United Kingdom; School of Physical Sciences, The Open University, Milton Keynes, United Kingdom; Department of Earth and Planetary Sciences, Birkbeck University of London, London, United Kingdom
推荐引用方式 GB/T 7714	Davis J.M.,Banham S.G.,Grindrod P.M.,et al. Morphology; Development; and Sediment Dynamics of Elongating Linear Dunes on Mars[J],2020,47(12).
APA	Davis J.M.,Banham S.G.,Grindrod P.M.,Boazman S.J.,Balme M.R.,&Bristow C.S..(2020).Morphology; Development; and Sediment Dynamics of Elongating Linear Dunes on Mars.Geophysical Research Letters,47(12).
MLA	Davis J.M.,et al."Morphology; Development; and Sediment Dynamics of Elongating Linear Dunes on Mars".Geophysical Research Letters 47.12(2020).