Oceanography The Official Magazine of
The Oceanography Society
Volume 21 Issue 04

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Volume 21, No. 4
Pages 164 - 167

OpenAccess

Monitoring the Seafloor Using the Noninvasive Eddy Correlation Technique: Integrated Benthic Exchange Dynamics

Peter Berg Markus Huettel
First Paragraph

The eddy correlation technique has been used for 60 years in atmospheric boundary layer research to measure land-air exchanges of different constituents (e.g., Swinbank, 1951). Only recently, the technique has also been applied to the benthic boundary layer by Berg et al. (2003), who determined sediment-water fluxes of dissolved O2 and validated their findings against in situ chamber measurements. It is technically challenging to measure the key eddy correlation variables at a point near the sediment-water interface and at the high frequency required to fully resolve turbulent eddies. However, if feasible, the reward is high in that major limitations inherently linked to other flux methods, such as lab measurements in sediment cores and deployments of in situ chambers, can be bypassed. Specifically, eddy correlation measurements integrate over a larger area (Berg et al., 2007) and are done under true in situ conditions with no disturbances of sediment, light, and bottom boundary layer flow. The latter is particularly important for permeable sediments, where current and wave-driven porewater flushing can significantly alter biogeochemical cycling (Huettel et al., 1998; Jahnke et al., 2000; Reimers et al., 2004). As methodological bias is minimized, this technique can significantly improve monitoring at the seafloor.

Citation

Berg, P., and M. Huettel. 2008. Monitoring the seafloor using the noninvasive eddy correlation technique: Integrated benthic exchange dynamics. Oceanography 21(4):164–167, https://doi.org/10.5670/oceanog.2008.13.

References

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McGinnis, D.F., P. Berg, A. Brand, C. Lorrai, T.J. Edmonds, and A. Wüest. 2008. Measurements of eddy correlation oxygen fluxes in shallow freshwaters: Towards routine applications and analysis. Geophysical Research Letters 35(L04403), doi:10.1029/2007GL032747.

Reimers, C.E., H.A. Stecher, G.L. Taghon, C.M. Fuller, M. Huettel, A. Rusch, N. Ryckelynck, and C. Wild. 2004. In situ measurements of advective solute transport in permeable shelf sands. Continental Shelf Research 24:183–201.

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