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DOI | 10.1002/2017GL075721 |
A General Model for the Helical Structure of Geophysical Flows in Channel Bends | |
Azpiroz-Zabala, M.1,2; Cartigny, M. J. B.3,4; Sumner, E. J.1; Clare, M. A.2; Talling, P. J.3,4; Parsons, D. R.5; Cooper, C.6 | |
2017-12-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:23 |
文章类型 | Article |
语种 | 英语 |
国家 | England; USA |
英文摘要 | Meandering channels formed by geophysical flows (e.g., rivers and seafloor turbidity currents) include the most extensive sediment transport systems on Earth. Previous measurements from rivers show how helical flow at meander bends plays a key role in sediment transport and deposition. Turbidity currents differ from rivers in both density and velocity profiles. These differences, and the lack of field measurements from turbidity currents, have led to multiple models for their helical flow around bends. Here we present the first measurements of helical flow in submarine turbidity currents. These 10 flows lasted for 1-10 days, were up to similar to 80 m thick, and displayed a consistent helical structure. This structure comprised two vertically stacked cells, with the bottom cell rotating in the opposite direction to helical flow in rivers. Furthermore, we propose a general model that predicts the range of helical flow structures observed in rivers, estuaries, and turbidity currents based on their density stratification. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000419102400029 |
WOS关键词 | SINUOUS SUBMARINE CHANNELS ; CORNEY ET-AL. ; TURBIDITY CURRENTS ; CURVED CHANNELS ; TURBULENCE STRUCTURE ; SPATIAL EVOLUTION ; GRAVITY-CURRENT ; ORIENTATION ; SEDIMENTOLOGY ; TOPOGRAPHY |
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/27860 |
专题 | 气候变化 |
作者单位 | 1.Univ Southampton, Ocean & Earth Sci, Southampton, Hants, England; 2.Natl Oceanog Ctr, Southampton, Hants, England; 3.Univ Durham, Dept Earth Sci, Durham, England; 4.Univ Durham, Dept Geog, Durham, England; 5.Univ Hull, Dept Geog Environm & Earth Sci, Kingston Upon Hull, N Humberside, England; 6.Chevron Energy Technol Co, San Ramon, CA USA |
推荐引用方式 GB/T 7714 | Azpiroz-Zabala, M.,Cartigny, M. J. B.,Sumner, E. J.,et al. A General Model for the Helical Structure of Geophysical Flows in Channel Bends[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(23). |
APA | Azpiroz-Zabala, M..,Cartigny, M. J. B..,Sumner, E. J..,Clare, M. A..,Talling, P. J..,...&Cooper, C..(2017).A General Model for the Helical Structure of Geophysical Flows in Channel Bends.GEOPHYSICAL RESEARCH LETTERS,44(23). |
MLA | Azpiroz-Zabala, M.,et al."A General Model for the Helical Structure of Geophysical Flows in Channel Bends".GEOPHYSICAL RESEARCH LETTERS 44.23(2017). |
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