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Suspended particulate matter dynamics and aggregate sizes in a high turbidity area
Fettweis, M.; Francken, F.; Pison, V.; Van den Eynde, D. (2006). Suspended particulate matter dynamics and aggregate sizes in a high turbidity area. Mar. Geol. 235(1-4): 63-74. dx.doi.org/10.1016/j.margeo.2006.10.005
In: Marine Geology. Elsevier: Amsterdam. ISSN 0025-3227; e-ISSN 1872-6151
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| Trefwoord |
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| Author keywords |
SPM; aggregates; flocculation; Kolmogorov microscale; organic matter; |
| Auteurs | | Top |
- Fettweis, M.
- Francken, F.
- Pison, V.
- Van den Eynde, D.
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| Abstract |
Measurements of aggregate size, suspended particulate matter (SPM) concentration and current velocity have been carried.out in the Belgian coastal zone (southern North Sea). Two stations were situated in the coastal turbidity maximum zone; another station was located more offshore at the edge of this turbidity maximum. The data have been collected using a LISST 100, OBS sensors, water samples and a bottom mounted ADCP. Turbulence (Kolmogorov microscale) has been modelled for the same period using a 3D numerical model. The results show that the size of the aggregates is significantly smaller in the coastal turbidity maximum area. The processes responsible for the occurrence of smaller aggregate size in the coastal zone compared with the more offshore location are: the higher turbulence; the smaller time available for the aggregates to grow up to an equilibrium size; the higher deposition of mud, resulting in a break-up of the floes and the lower availability of organic matter, which may limit the size of the floes. |
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