Abstract
[1] Field measurements of the diffusive boundary layer (DBL) and bottom boundary layer (BBL) in two distinctly different coastal ocean environments are analyzed. The dynamic conditions of the BBL have a strong influence on the DBL thickness (δDBL) and oxygen diffusive fluxes at the sediment-water interface. Three different estimates of the Batchelor length (LB) in the BBL are obtained from the measured dissipation rate of turbulent kinetic energy (εm), turbulent friction velocity (u*), and tidal velocity (Um) and bottom roughness length (z0). The two estimates of LB from εm and u* have low correlations with δDBL. The estimate of LB from Um and z0 has a higher correlation with δDBL at both sites, suggesting a simple estimation of δDBL.
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