continental shelves; biogeochemical cycles; numerical model
Abstract :
[en] Three-dimensional (3D) ecosystem models of shelf environments should properly account for the biogeochemical cycling within the sea floor. However, a full and explicit representation of sediment biogeochemistry into 3D ocean models is computationally demanding. Here, we describe a simplified approach to include benthic processes in 3D ocean models, which includes a parameterization of the different pathways for organic matter mineralization and allows for organic matter remobilization by bottom currents and waves. This efficient approach enables decadal simulations that resolve the inertial contribution of the sea floor to the biogeochemical cycling in shelf environments. The model was implemented to analyze the benthic-pelagic coupling in the northwestern shelf of the Black Sea. Three distinct biogeochemical provinces were identified on the basis of fluxes and rates associated with benthic-pelagic coupling. Our model simulations suitably capture the seasonal variability of in situ flux data as well as their regional variation, which stresses the importance of incorporating temporally varying sediment biogeochemistry and resuspension/redeposition cycles in shelf ecosystem models.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Capet, Arthur ; Université de Liège > Département d'Astrophysique, Géophysique et Océanographie > MAST (Modeling for Aquatic Systems)
Meysman, Filip
Akoumianaki, Ioanna
Soetaert, Karline
Grégoire, Marilaure ; Université de Liège > Département d'Astrophysique, Géophysique et Océanographie > MAST (Modeling for Aquatic Systems)
Language :
English
Title :
Integrating sediment biogeochemistry into 3D oceanic models: A study of benthic-pelagic coupling in the Black Sea
Publication date :
2016
Journal title :
Ocean Modelling
ISSN :
1463-5003
eISSN :
1463-5011
Publisher :
Elsevier Science, Oxford, United Kingdom
Volume :
101
Pages :
83-100
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
CÉCI : Consortium des Équipements de Calcul Intensif
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