Morphodynamics of barchan and dome dunes under variable wind regimes

Abstract

Research Article| July 19, 2018 Morphodynamics of barchan and dome dunes under variable wind regimes Xin Gao; Xin Gao 1State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 818 South Beijing Road, Urumqi 830011, Xinjiang, China Search for other works by this author on: GSW Google Scholar Cyril Gadal; Cyril Gadal 2Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, UMR 7154 CNRS, 1 rue Jussieu, 75238 Paris Cedex 05, France Search for other works by this author on: GSW Google Scholar Olivier Rozier; Olivier Rozier 2Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, UMR 7154 CNRS, 1 rue Jussieu, 75238 Paris Cedex 05, France Search for other works by this author on: GSW Google Scholar Clément Narteau Clément Narteau 2Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, UMR 7154 CNRS, 1 rue Jussieu, 75238 Paris Cedex 05, France Search for other works by this author on: GSW Google Scholar Author and Article Information Xin Gao 1State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 818 South Beijing Road, Urumqi 830011, Xinjiang, China Cyril Gadal 2Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, UMR 7154 CNRS, 1 rue Jussieu, 75238 Paris Cedex 05, France Olivier Rozier 2Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, UMR 7154 CNRS, 1 rue Jussieu, 75238 Paris Cedex 05, France Clément Narteau 2Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, UMR 7154 CNRS, 1 rue Jussieu, 75238 Paris Cedex 05, France Publisher: Geological Society of America Received: 01 May 2018 Revision Received: 06 Jul 2018 Accepted: 07 Jul 2018 First Online: 19 Jul 2018 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2018 Geological Society of America Geology (2018) 46 (9): 743–746. https://doi.org/10.1130/G45101.1 Article history Received: 01 May 2018 Revision Received: 06 Jul 2018 Accepted: 07 Jul 2018 First Online: 19 Jul 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Xin Gao, Cyril Gadal, Olivier Rozier, Clément Narteau; Morphodynamics of barchan and dome dunes under variable wind regimes. Geology 2018;; 46 (9): 743–746. doi: https://doi.org/10.1130/G45101.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Dome dunes are traditionally interpreted as a transient or an independent class of bedforms because of their rounded and smooth shape without slipfaces. Here we show that they can also reach a steady state and form dome dune fields, which entail the same interactions between flow, bed topography, and moving sediment as other dune types in the absence of grain-size segregation and vegetation. We study the transition from barchan to dome dunes by increasing the standard deviation of a normal distribution of sand flux orientation in a numerical model. We find that, under steady-state conditions, barchan and dome dunes exhibit the same relationships between their height and migration rate. As shown in Earth’s deserts, dome dune shape and migration rate can then be used to estimate sand flux properties, including the variability in transport directionality. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.