Technical note: Novel triple O2 sensor aquatic eddy covariance instrument with improved time shift correction reveals central role of microphytobenthos for carbon cycling in coral reef sands.

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Date
2021Author
Merikhi, Alireza
Berg, Peter
Huettel, Markus Huettel
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Show full item recordAbstract
The aquatic eddy covariance technique stands out
as a powerful method for benthic O2 flux measurements in
shelf environments because it integrates effects of naturally
varying drivers of the flux such as current flow and light.
In conventional eddy covariance instruments, the time shift
caused by spatial separation of the measuring locations of
flow and O2 concentration can produce substantial flux errors
that are difficult to correct. We here introduce a triple
O2 sensor eddy covariance instrument (3OEC) that by instrument
design eliminates these errors. This is achieved by positioning
three O2 sensors around the flow measuring volume,
which allows the O2 concentration to be calculated at the
point of the current flow measurements. The new instrument
was tested in an energetic coastal environment with highly
permeable coral reef sands colonised by microphytobenthos.
Parallel deployments of the 3OEC and a conventional eddy
covariance system (2OEC) demonstrate that the n.....
Journal
BiogeosciencesVolume
18Page Range
pp. 5381–5395Document Language
enSustainable Development Goals (SDG)
14.aEssential Ocean Variables (EOV)
N/ADOI Original
https://doi.org/10.5194/bg-18-5381-202Citation
Merikhi, A., Berg, P. and Huettel, M. (2021) Technical note: Novel triple O2 sensor aquatic eddy covariance instrument with improved time shift correction reveals central role of microphytobenthos for carbon cycling in coral reef sands, Biogeosciences, 18, pp.5381–5395. DOI: https://doi.org/10.5194/bg-18-5381-2021.Collections
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