Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.geomorph.2016.10.033 |
Environmental controls, morphodynamic processes, and ecogeomorphic interactions of barchan to parabolic dune transformations | |
Yan, Na1,2; Baas, Andreas C. W.3 | |
通讯作者 | Yan, Na |
来源期刊 | GEOMORPHOLOGY
![]() |
ISSN | 0169-555X |
EISSN | 1872-695X |
出版年 | 2017 |
卷号 | 278页码:209-237 |
英文摘要 | The transformation of barchans into parabolic dunes has been observed in various dune systems around the world. Precise details of how environmental controls influence the dune transformation and stabilisation mechanism, however, remain poorly understood. A ’horns-anchoring’ mechanism and a ’neblchas-initiation’ mechanism have previously been proposed and selected environmental controls on the transformation have been explored by some modelling efforts, but the morphodynamic processes and eco-geomorphic interactions involved are unclear and comparison between different dune systems is challenging. This study extends a cellular automaton model, informed by empirical data from fieldwork and remote sensing, to fully explore how vegetation characteristics, boundary conditions, and wind regime influence the transformation process and the resulting dune morphologies. A ’dynamic growth function’ is introduced for clump-like perennials to differentiate between growing and non-growing seasons and to simulate the development of young plants into mature plants over multiple years. Modelling results show that environmental parameters interact with each other in a complex manner to impact the transformation process. The study finds a fundamental power-law relation between a non-dimensional parameter group, so-called the ’dune stabilising index’ (S.), and the normalised migration distance of the transforming dune, which can be used to reconstruct paleo-environmental conditions and monitor the impacts of changes in climate or land-use on a dune system. Four basic eco-geomorphic interaction zones are identified which bear different functionality in the barchan to parabolic dune transformation. The roles of different environmental controls in changing the eco-geomorphic interaction zones, transforming processes, and resulting dune morphologies are also clarified. (C) 2016 Elsevier B.V. All rights reserved. |
英文关键词 | Barchan Parabolic dune Morphodynamic process Vegetation Eco-geomorphic interaction CA modelling |
类型 | Article |
语种 | 英语 |
国家 | England |
收录类别 | SCI-E |
WOS记录号 | WOS:000392555000016 |
WOS关键词 | VEGETATION COVER ; COASTAL DUNES ; CONCEPTUAL-FRAMEWORK ; NORTH QUEENSLAND ; CLIMATIC CHANGES ; SAND TRANSPORT ; WIND ; DESERT ; FIELDS ; BRAZIL |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
来源机构 | University of London |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/199260 |
作者单位 | 1.Kings Coll London, Dept Geog, London WC2R 2LS, England; 2.Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England; 3.Kings Coll London, Dept Geog, London WC2R 2LS, England |
推荐引用方式 GB/T 7714 | Yan, Na,Baas, Andreas C. W.. Environmental controls, morphodynamic processes, and ecogeomorphic interactions of barchan to parabolic dune transformations[J]. University of London,2017,278:209-237. |
APA | Yan, Na,&Baas, Andreas C. W..(2017).Environmental controls, morphodynamic processes, and ecogeomorphic interactions of barchan to parabolic dune transformations.GEOMORPHOLOGY,278,209-237. |
MLA | Yan, Na,et al."Environmental controls, morphodynamic processes, and ecogeomorphic interactions of barchan to parabolic dune transformations".GEOMORPHOLOGY 278(2017):209-237. |
条目包含的文件 | 条目无相关文件。 |
个性服务 |
推荐该条目 |
保存到收藏夹 |
导出为Endnote文件 |
谷歌学术 |
谷歌学术中相似的文章 |
[Yan, Na]的文章 |
[Baas, Andreas C. W.]的文章 |
百度学术 |
百度学术中相似的文章 |
[Yan, Na]的文章 |
[Baas, Andreas C. W.]的文章 |
必应学术 |
必应学术中相似的文章 |
[Yan, Na]的文章 |
[Baas, Andreas C. W.]的文章 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。