Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL085147 |
Elongation and Stability of a Linear Dune | |
Rozier, Olivier1; Narteau, Clement1; Gadal, Cyril1; Claudin, Philippe2; du Pont, Sylvain Courrech3 | |
2019-12-30 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | France |
英文摘要 | Compared to barchan dunes, the morphodynamics of linear dunes that elongate on a nonerodible bed have barely been investigated by means of laboratory experiments or numerical simulations. Using a cellular automaton model, we study the elongation of a solitary linear dune from a sand source and show that it can reach a steady state. This steady state is analyzed to understand the physical processes at work along the dune. Crest reversals together with avalanche processes control the shape of transverse sections. Dune width and height decrease almost linearly with distance downstream until the minimum size for dune is reached. This is associated with a constant sand loss along the dune, which eventually compensates for the sediment influx and sets the dune length. This sand budget is discussed to distinguish an elongating linear dune from a barchan dune and to explain the complexity of linear dune fields in nature. |
英文关键词 | solitary linear dune steady-state morphology sand flux estimation finger dune elongating dune |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000504763200001 |
WOS关键词 | BARCHAN ; ORIENTATION ; BEDFORMS ; DYNAMICS ; FIELD ; AGE |
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/225269 |
专题 | 环境与发展全球科技态势 |
作者单位 | 1.Univ Paris, Inst Phys Globe Paris, UMR 7154, CNRS, Paris, France; 2.Univ Paris, Sorbonne Univ, PSL Res Univ,CNRS, Phys & Mecan Milieux Heterogenes,UMR 7636,ESPCI P, Paris, France; 3.Univ Paris, Lab Mat Syst Comp, UMR 7057, CNRS, Paris, France |
推荐引用方式 GB/T 7714 | Rozier, Olivier,Narteau, Clement,Gadal, Cyril,et al. Elongation and Stability of a Linear Dune[J]. GEOPHYSICAL RESEARCH LETTERS,2019. |
APA | Rozier, Olivier,Narteau, Clement,Gadal, Cyril,Claudin, Philippe,&du Pont, Sylvain Courrech.(2019).Elongation and Stability of a Linear Dune.GEOPHYSICAL RESEARCH LETTERS. |
MLA | Rozier, Olivier,et al."Elongation and Stability of a Linear Dune".GEOPHYSICAL RESEARCH LETTERS (2019). |
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