IOCAS-IR  > 海洋地质与环境重点实验室
The encountering dune fields in a bidirectional flow system in the northwestern South China Sea: Pattern, morphology, and recent dynamics
Li, Jinyuan4,5; Yan, Jun1,2,3; Feng, Xingru3,6; Song, Yongdong1,3; Xu, Tao1,3; Zhuang, Lihua1,3; Luan, Zhendong1,2,3; Zhang, Jianxing1,3; Ma, Xiaochuan1,2,3
2022-06-01
Source PublicationGEOMORPHOLOGY
ISSN0169-555X
Volume406Pages:14
Corresponding AuthorMa, Xiaochuan(mxch@qdio.ac.cn)
AbstractDune fields are composed of differently scaled of dunes and can reflect the external environmental conditions in both eolian and subaqueous environments. However, little is known about the interplay between dune fields when they meet together. Based on recent field observations, we identified new dune fields that encountered with other dunes migrating oppositely under a bidirectional flow system on the tidal shelf in the northwestern South China Sea. The dune fields, whose front boundary was outlined by the reversal of dune asymmetry, encountered each other end-by-end or side-by-side. Six encounter patterns were identified through the relative relation between dunes over the field boundary, which was associated with the net sand transport strength and sand supply. Under the control of the residual sand transport regime, dunes became steeper and more symmetrical towards the dune-field boundary and migrated gradually slower to the minimum. The regional net bedload transport determined the convergent migration of dunes in the encountering fields and shaped the linear, symmetrical, and steep shapes of dunes over the field boundary. The field boundary was shifting from 2014 to 2016, and most dunes close to the field frontier moved to their stoss side, thereby weakening the asymmetry extent or reversing the asymmetry. The field boundary shifts reflected location inconsistency between the long-term accumulative transport balance (symmetrical shape) and the recent transport balance (nonmigration) on dunes near field boundary which was ascribed to the modulation of residual sand transports associated with the systematic changes in the regional flow conditions. These results suggest that the behavior of dunes near the field boundary can sensitively reflect the field-field interplay and reveal the relevant minor environmental changes, thus providing new insights into the surface processes in a bidirectional flow system of a planet with eolian or subaqueous environments.
KeywordDune fields Bidirectional flow Morphology Tide the South China Sea
DOI10.1016/j.geomorph.2022.108210
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41876035] ; [157/iocas.2021.0023]
WOS Research AreaPhysical Geography ; Geology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000795075900002
PublisherELSEVIER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/179246
Collection海洋地质与环境重点实验室
海洋环流与波动重点实验室
Corresponding AuthorMa, Xiaochuan
Affiliation1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Qingdao, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China
3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China
4.China Univ Geosci Beijing, Sch Ocean Sci, Beijing, Peoples R China
5.Longyuan Beijing Wind Power Engn Design Consulting, Beijing 100083, Peoples R China
6.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li, Jinyuan,Yan, Jun,Feng, Xingru,et al. The encountering dune fields in a bidirectional flow system in the northwestern South China Sea: Pattern, morphology, and recent dynamics[J]. GEOMORPHOLOGY,2022,406:14.
APA Li, Jinyuan.,Yan, Jun.,Feng, Xingru.,Song, Yongdong.,Xu, Tao.,...&Ma, Xiaochuan.(2022).The encountering dune fields in a bidirectional flow system in the northwestern South China Sea: Pattern, morphology, and recent dynamics.GEOMORPHOLOGY,406,14.
MLA Li, Jinyuan,et al."The encountering dune fields in a bidirectional flow system in the northwestern South China Sea: Pattern, morphology, and recent dynamics".GEOMORPHOLOGY 406(2022):14.
Files in This Item:
File Name/Size DocType Version Access License
1-s2.0-S0169555X2200(14675KB)期刊论文出版稿限制开放CC BY-NC-SAView
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li, Jinyuan]'s Articles
[Yan, Jun]'s Articles
[Feng, Xingru]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li, Jinyuan]'s Articles
[Yan, Jun]'s Articles
[Feng, Xingru]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li, Jinyuan]'s Articles
[Yan, Jun]'s Articles
[Feng, Xingru]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 1-s2.0-S0169555X22001039-main.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.