Benthic boundary layer

The structure of turbulence in the transition zone from a fully turbulent fluid to a nonfluid medium (often called the Prandtl layer) has been studied intensively (see, for instance, Williams and Elder, 1989). Well-known examples are the structure of the turbulent wind field above the land surface (known as the planetary boundary layer) or the mixing regime above the sediments of lakes and oceans (benthic boundary layer). The vertical variation of D(x) is schematically shown in Fig. 19.8b. Yet, in most cases it is sufficient to treat the boundary as if D(x) had the shape shown in Fig. 19.8a. 

Moore, P.A., Weissburg, M.J., Parrish, J.M., Zimmer-Faust, R.K., and Gerhardt, G.A., Spatial distribution of odors in simulated benthic boundary layer flows, J. Chem. Ecol., 20, 255, 1994. 

Estuarine Turbidity Maximum, Benthic Boundary Layer, and Fluid Muds... 

Figure 6.8 Conceptual diagram of the different scales of the components of the benthic boundary layer (BBL). In bottom water above the sediment-water interface where the Eckman layer occurs as flow is affected by the rotation of the Earth and bottom friction, where w = friction velocity and / = Coriolis parameter the logarithmic layer predominates when the velocity profile is well described using a logarithmic function a viscous sublayer is formed by molecular viscosity a diffusive boundary layer forms, whereby solute transport is controlled by molecular diffusion. (Modified from Boudreau and Jprgensen, 2001.)...

The high vertical flux of particulates in river/estuarine plume regions commonly results in the accumulation of particles in the formation of a benthic boundary layer (BBL) and/or mobile and fluid muds (see chapter 6 for more details). The BBL is defined by Boudreau and Iprgensen (2001, p. 1) as those portions of sediment and water columns that are affected directly in the distribution of their properties and processes by the presence of... 

Benthic boundary layer those portions of sediment and water columns that are affected directly in the distribution of their properties and processes by the presence of the sediment-water interface. 

Aller, R.C. (2001) Transport and reactions in the bioirrigated zone. In The Benthic Boundary Layer (Boudreau, B.P., and Jorgensen, B.B., eds.), pp. 269-301, Oxford University Press, New York. 

Blackburn, T.H. (1991) Accumulation and regeneration Processes at the benthic boundary layer. In Ocean margin Processes in Global Change (Mantoura, R.F.C., Martin, J.M., and Wollast, R., eds.), pp. 181-195, John Wiley, New York. 

McCave, I.N., (ed.) (1976) The Benthic Boundary Layer. Plenum Press, New York. 

McKee, B.A., Aller, R.C., Allison, M.A., Bianchi, T.S., and Kineke, GC. (2004) Transport and transformation of dissolved and particulate materials on continental margins by major rivers benthic boundary layer and seabed processes. Cont. Shelf Res. 24, 899-926. 

Bailey, T. G., Youngbluth, M. J., and Owen, G. P. (1995). Chemical composition and metabolic rates of gelatinous zooplankton from midwater and benthic boundary layer environments off Cape Hatteras, North Carolina, USA. Mar. Ecol. Prog. Ser. 122, 121—134. 

Thomsen L. and Van Weering T. J. (1998) Spatial and temporal variability of particulate matter in the benthic boundary layer... 

Reimers C. E., Jahnke R. A., and Thomsen L. (2(X)1) In situ sampling in the benthic boundary layer. In The Benthic Boundary Layer Transport Processes and Biogeochemistry (eds. B. P. Boudreau and B. B. Jprgensen). Oxford University Press, Oxford, pp. 245 - 268. 

Jahmhch, S., Lund-Hansen, L. C., Leipe, T., 2002. Enhanced settling velocities and vertical transport of particulate matter by aggregation in the benthic boundary layer. Geografisk Tidskrift, Danish Journal of Geography, 102, 37 9. 

Chemical and biological processes in the sediments and benthic boundary layer (BBL) are important contributors to oceanic biogeochemical cycles, especially in the Arabian Sea due to its uncommon geographical setting. The oceanographic conditions experienced by various margins (e.g. Somalia/Oman versus India/Pakistan) are widely different, which in conjunction with the extensive mid-depth 02 deficiency produce a variety of BBL and sedimentary environments with respect to, among other factors, food supply, redox status and the nature and activity of benthic communities (Cowie, 2002). 

Smith Jr., K.L. (1992) Benthic boundary layer communities and carbon cycling at abyssal depths in the central North Pacific. Limnology and Oceanography, 37, 1034—1056. 

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