Integrating sediment biogeochemistry into 3D oceanic models: A study of benthic-pelagic coupling in the Black Sea

[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

Additional URL :

http://www.sciencedirect.com/science/article/pii/S146350031630004X

Funders :

DG RDT - Commission Européenne. Direction Générale de la Recherche et de l'Innovation

Available on ORBi :

since 23 May 2016

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