Field and Numerical Studies of Near-Bed Aggregate Dynamics
Parameter List
K ts (z)
Kdf (z)
N ij (z)
d·· I,}
£ (z)
v
R· (z)
I,}
M·· I,}
u(z)
t
k
A. (z)
References
concentration of fraction i,j
(g I-I)
height above the sediment
(m)
roughness height
(m)
Eddy-diffusion coefficient constant over entire (m 2 S-I)
model height
Eddy-diffusion coefficient, linearly increasing in (m 2 S-I)
the BBL, constant above the boundary layer
Eddy-diffusion coefficient, linearly increasing in (m 2 S-I)
the BBL, decreasing above the boundary layer
settling velocity of fraction i,j
encounter rate, turbulent shear,
encounter rate, differential settling
particle abundance of fraction i,j at layer z
particle diameter of fraction i,j
dissipation energy
kinematic viscosity
reaction term of fraction i,j
particle mass of fraction i,j
current velocity
current velocity at 100 cm above the seafloor
friction velocity
time
von Karman's constant
particle stickiness; 0-1
Kolmogorov length
(m d- I )
(m 3 S-I),
(m3 S-I)
(N cm- 3 )
(m)
(m2 s-3)
(m2 S-I)
(kg particle-I)
(m S-I)
(m S-I)
(m S-I)
(s)
(dimensionless)
(dimensionless)
(m)
205
Alldredge AL, Mc Gillivary P (1991) The attachment probabilities of marine snow and their
implications for particle coagulations in the ocean. Deep-Sea Res 38: 431-443
Alldredge AL, Passow U, Logan BE (1993) The abundance and significance of a class of large,
transparent organic particles in the ocean. Deep-Sea Res 40: 1131-1140
Angel MV (1990) Life in the benthic boundary layer: connections to the mid-water and sea
floor. Phil Trans R Soc Lond A 331: 15-28
Asper VL (1986). Accelerated settling of particulate matter by marine snow aggregates. Woods
Hole Oceanographic Institution 86-12.
Asper VL (1987) Measuring the flux and sinking speed of marine snow aggregates. Deep-Sea
Res 34: 1-17