Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL084526 |
Direct Monitoring Reveals Initiation of Turbidity Currents From Extremely Dilute River Plumes | |
Hage, Sophie1,2; Cartigny, Matthieu J. B.3; Sumner, Esther J.2; Clare, Michael A.1; Clarke, John E. Hughes4; Talling, Peter J.3; Lintern, D. Gwyn5; Simmons, Stephen M.6; Jacinto, Ricardo Silva7; Vellinga, Age J.2; Allin, Joshua R.8; Azpiroz-Zabala, Maria9; Gales, Jenny A.10; Hizzett, Jamie L.2; Hunt, James E.1; Mozzato, Alessandro2; Parsons, Daniel R.6; Pope, Ed L.3; Stacey, Cooper D.5; Symons, William O.11; Vardy, Mark E.1; Watts, Camilla2 | |
2019-10-29 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
文章类型 | Article;Early Access |
语种 | 英语 |
国家 | England; USA; Canada; France; Netherlands; Wales |
英文摘要 | Rivers (on land) and turbidity currents (in the ocean) are the most important sediment transport processes on Earth. Yet how rivers generate turbidity currents as they enter the coastal ocean remains poorly understood. The current paradigm, based on laboratory experiments, is that turbidity currents are triggered when river plumes exceed a threshold sediment concentration of similar to 1 kg/m(3). Here we present direct observations of an exceptionally dilute river plume, with sediment concentrations 1 order of magnitude below this threshold (0.07 kg/m(3)), which generated a fast (1.5 m/s), erosive, short-lived (6 min) turbidity current. However, no turbidity current occurred during subsequent river plumes. We infer that turbidity currents are generated when fine sediment, accumulating in a tidal turbidity maximum, is released during spring tide. This means that very dilute river plumes can generate turbidity currents more frequently and in a wider range of locations than previously thought. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000493036700001 |
WOS关键词 | SEDIMENTATION ; FLOWS ; CONVECTION ; DYNAMICS ; TRIGGERS ; DELTA |
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/187830 |
专题 | 气候变化 |
作者单位 | 1.Natl Oceanog Ctr Southampton, Southampton, Hants, England; 2.Univ Southampton, Sch Ocean & Earth Sci, Southampton, Hants, England; 3.Univ Durham, Dept Geog, Durham, England; 4.Univ New Hampshire, Ctr Coastal & Ocean Mapping, Durham, NH 03824 USA; 5.Geol Survey Canada, Nat Resources Canada, Sidney, BC, Canada; 6.Univ Hull, Energy & Environm Inst, Kingston Upon Hull, N Humberside, England; 7.IFREMER Ctr Brest, Marine Geosci Unit, Plouzane, France; 8.Geotek Ltd, Daventry, England; 9.Delft Univ Technol, Fac Civil Engn & Geosci, Delft, Netherlands; 10.Univ Plymouth, Sch Biol & Marine Sci, Plymouth, Devon, England; 11.CGG Robertson, Llandudno, Wales |
推荐引用方式 GB/T 7714 | Hage, Sophie,Cartigny, Matthieu J. B.,Sumner, Esther J.,et al. Direct Monitoring Reveals Initiation of Turbidity Currents From Extremely Dilute River Plumes[J]. GEOPHYSICAL RESEARCH LETTERS,2019. |
APA | Hage, Sophie.,Cartigny, Matthieu J. B..,Sumner, Esther J..,Clare, Michael A..,Clarke, John E. Hughes.,...&Watts, Camilla.(2019).Direct Monitoring Reveals Initiation of Turbidity Currents From Extremely Dilute River Plumes.GEOPHYSICAL RESEARCH LETTERS. |
MLA | Hage, Sophie,et al."Direct Monitoring Reveals Initiation of Turbidity Currents From Extremely Dilute River Plumes".GEOPHYSICAL RESEARCH LETTERS (2019). |
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