Oxygen profiles and organic carbon fluxes in Laurentian Trough sediments
Silverberg, N.; Bakker, J.; Edenborn, H.M.; Sundby, B. (1987). Oxygen profiles and organic carbon fluxes in Laurentian Trough sediments. Neth. J. Sea Res. 21(2): 95-105
In: Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579; e-ISSN 1873-1406, meer
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| Auteurs | | Top |
- Silverberg, N.
- Bakker, J.
- Edenborn, H.M.
- Sundby, B.
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| Abstract |
Sediment trap samples and undisturbed cores of bottom sediment were obtained during spring and summer from a 350-m-deep site in the Laurentian Trough, Gulf of St. Lawrence, and used to determine the flux of organic carbon concentration profiles close to the sediment-water interface. Oxygen uptake rates by the sediment, calculated from micro-electrode profiles and a one-dimensional molecular diffusion transport model, can only account for 20% of the organic carbon that is mineralized in the sediment. Mechanisms other than molecular diffusion must dominate the transport of oxygen across the sediment-water interface in these deep coastal segments. |
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