| Resuspension and advection processes affecting suspended particulate matter concentrations in the central English Channel | |
| Velegrakis, AF; Gao, S; Lafite, R; Dupont, JP; Huault, MF; Nash, LA; Collins, MB | |
| 1997-12-01 | |
| 发表期刊 | JOURNAL OF SEA RESEARCH
 |
| ISSN | 1385-1101 |
| 卷号 | 38期号:1-2页码:17-34 |
| 文章类型 | Article |
| 摘要 | Suspended particulate matter (SPM) measurements obtained along a cross-section in the central English Channel (Wight-Cotentin transect) indicate that the area may be differentiated into: (1) an English coastal zone, associated with the highest concentrations; (2) a French coastal zone, with intermediate concentrations; and (3) the offshore waters of the Channel, characterised by a very low suspended-sediment load. The SPM particle-size distribution was modal close to the English coast (main mode 10-12 mu m); the remainder of the area was characterised by flat SPM distributions. Examination of the diatom communities in the SPM suggest:; that material resuspended in the intertidal zone and the estuarine environments was advected towards the offshore waters of the English Channel.; Suspended particulate matter (SPM) measurements obtained along a cross-section in the central English Channel (Wight-Cotentin transect) indicate that the area may be differentiated into: (1) an English coastal zone, associated with the highest concentrations; (2) a French coastal zone, with intermediate concentrations; and (3) the offshore waters of the Channel, characterised by a very low suspended-sediment load. The SPM particle-size distribution was modal close to the English coast (main mode 10-12 mu m); the remainder of the area was characterised by flat SPM distributions. Examination of the diatom communities in the SPM suggest:; that material resuspended in the intertidal zone and the estuarine environments was advected towards the offshore waters of the English Channel. Considerable variations in SPM concentrations occurred during a tidal cycle: maximum concentrations were sometimes up to 3 times higher than the minimum concentrations, Empirical orthogonal function (EOF) analysis of the SPM concentration time series indicates that, although the bottom waters were more turbid than the surficial waters, this was not likely to be the result of in situ sediment resuspension. Instead, the observed variations appear to be controlled mainly by advective mechanisms. The limited resuspension was probably caused by: (1) the limited availability of fine-grained material within the bottom sediments, and (2) 'bed-armouring' processes which protect the finer-grained fractions of the seabed material from erosion and entrainment within the overlying flow during the less energetic stages of the tide. |
| 关键词 | Suspended Particulate Matter English Channel Resuspension Advective Transport Eof Analysis |
| 学科领域 | Marine & Freshwater Biology ; Oceanography |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000071269300002 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/3842 |
| 专题 | 海洋地质与环境重点实验室 |
| 作者单位 | 1.Univ Southampton, Dept Oceanog, Southampton Oceanog Ctr, Southampton SO14 3ZH, Hants, England 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 3.Univ Rouen, Fac Sci & Tech, Dept Geol, F-76821 Mt St Aignan, France |
| 推荐引用方式 GB/T 7714 | Velegrakis, AF,Gao, S,Lafite, R,et al. Resuspension and advection processes affecting suspended particulate matter concentrations in the central English Channel[J]. JOURNAL OF SEA RESEARCH,1997,38(1-2):17-34. |
| APA | Velegrakis, AF.,Gao, S.,Lafite, R.,Dupont, JP.,Huault, MF.,...&Collins, MB.(1997).Resuspension and advection processes affecting suspended particulate matter concentrations in the central English Channel.JOURNAL OF SEA RESEARCH,38(1-2),17-34. |
| MLA | Velegrakis, AF,et al."Resuspension and advection processes affecting suspended particulate matter concentrations in the central English Channel".JOURNAL OF SEA RESEARCH 38.1-2(1997):17-34. |
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