Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41561-019-0336-4 |
A unified model of ripples and dunes in water and planetary environments | |
Vinent, Orencio Duran1,2; Andreotti, Bruno3,5; Claudin, Philippe3; Winter, Christian1,4 | |
2019-05-01 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2019 |
卷号 | 12期号:5页码:345-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; USA; France |
英文摘要 | Subaqueous and aeolian bedforms are ubiquitous on Earth and other planetary environments. However, it is still unclear which hydrodynamic mechanisms lead to the observed variety of morphologies of self-organized natural patterns such as ripples, dunes or compound bedforms. Here we present simulations with a coupled hydrodynamic and sediment transport model that resolve the initial and mature stages of subaqueous and aeolian bedform evolution in the limit of large flow thickness. We identify two types of bedforms consistent with subaqueous ripples and dunes, and separated by a gap in wavelength. This gap is explained in terms of an anomalous hydrodynamic response in the structure of the inner boundary layer that leads to a shift of the position of the maximum shear stress from upstream to downstream of the crest. This anomaly gradually disappears when the bed becomes hydrodynamically rough. By also considering the effect of the spatial relaxation of sediment transport we provide a new unifying framework to compare ripples and dunes in planetary environments to their terrestrial counterparts. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000467814100009 |
WOS关键词 | TRANSVERSE AEOLIAN RIDGES ; EQUILIBRIUM MORPHOLOGY ; BED FORMS ; SAND-BED ; BEDFORMS ; MARS ; VENUS ; INSTABILITY ; INITIATION ; EVOLUTION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/183087 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Bremen Univ, MARUM Ctr Marine Environm Sci, Bremen, Germany; 2.Texas A&M Univ, Dept Ocean Engn, College Stn, TX 77843 USA; 3.Univ Paris Diderot, Lab Phys & Mecan Milieux Heterogenes, PMMH UMR 7636 CNRS, ESPCI PSL Res Univ,Sorbonne Univ, Paris, France; 4.Christian Albrechts Univ Kiel, Inst Geosci, Kiel, Germany; 5.Univ Paris Diderot, UMR 8023 ENS CNRS, LPENS, Paris, France |
推荐引用方式 GB/T 7714 | Vinent, Orencio Duran,Andreotti, Bruno,Claudin, Philippe,et al. A unified model of ripples and dunes in water and planetary environments[J]. NATURE GEOSCIENCE,2019,12(5):345-+. |
APA | Vinent, Orencio Duran,Andreotti, Bruno,Claudin, Philippe,&Winter, Christian.(2019).A unified model of ripples and dunes in water and planetary environments.NATURE GEOSCIENCE,12(5),345-+. |
MLA | Vinent, Orencio Duran,et al."A unified model of ripples and dunes in water and planetary environments".NATURE GEOSCIENCE 12.5(2019):345-+. |
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