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The dynamics of estuarine manganese cycling Morris, A.W.; Bale, A.J.; Howland, R.J.M. (1982). The dynamics of estuarine manganese cycling. Est., Coast. and Shelf Sci. 14(2): 175-192. https://dx.doi.org/10.1016/S0302-3524(82)80044-3 In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714; e-ISSN 1096-0015, meer

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Beschikbaar in	Auteurs
VLIZ: Non-open access 352467 [ aanvragen ]

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Trefwoorden

ANE, British Isles, England, Tamar Estuary Chemical elements > Metals > Transition elements > Heavy metals > Manganese Cycles > Chemical cycles > Geochemical cycle Forces (mechanics) > Friction > Bottom friction Motion > Water motion > Circulation > Water circulation > Shelf dynamics > Estuarine dynamics Motion > Water motion > Water currents > Tidal currents Physics > Mechanics > Kinetics > Chemical kinetics Suspension > Resuspension Transport > Sediment transport Tamar Estuary [Marine Regions] Marien/Kust; Brak water

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Auteurs		Top
Morris, A.W. Bale, A.J. Howland, R.J.M.

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Abstract

Seasonal observations of dissolved manganese in the Tamar Estuary, south-west England have demonstrated pronounced temporal and spatial variability in the distribution of this component. Simultaneous observations of physical and physico-chemical properties of the estuarine system, together with kinetic measurements of dissolved manganese behaviour in isolated samples, have demonstrated that the observed distributions are the instantaneous product of dynamic interactions involving external sources and internal input and removal processes. Dissolved manganese is mobilized internally from reduced sediments during advective resuspension of bed material so that this input is regulated by temporal and spatial variations in tidal stress. Manganese is returned to the sediments by continuous uptake on to suspended particles. These results indicate that changes in the relative effectiveness of both the input and removal mechanisms, which lead to internal cycling of manganese and to variable distributions of dissolved manganese within the estuary, are closely coupled to the internal behaviour of particles and hence to the tidally-induced oscillations in bed stress.

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