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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/gmd-2018-297
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-2018-297
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Model description paper 11 Jan 2019

Model description paper | 11 Jan 2019

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This discussion paper is a preprint. It is a manuscript under review for the journal Geoscientific Model Development (GMD).

MOMSO 1.0 - a near-global, coupled biogeochemical ocean-circulation model configuration with realistic eddy kinetic energy in the Southern Ocean

Heiner Dietze1,2, Ulrike Löptien1,2, and Julia Getzlaff1 Heiner Dietze et al.
  • 1GEOMAR, Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, 24105 Kiel, Germany
  • 2Institute of Geosciences, University of Kiel, Kiel, Germany

Abstract. We present a new near-global coupled biogeochemical ocean-circulation model configuration. The configuration features a horizontal discretization with a grid spacing of less than 11 km in the Southern Ocean and gradually coarsens in meridional direction to more than 200 km at 64° N where the model is bounded by a solid wall. The underlying code framework is GFDL's Modular Ocean Model coupled to the Biology Light Iron Nutrients and Gasses (BLING) ecosystem model of Galbraith et al. (2010).

The configuration is cutting-edge in that it features both a relatively equilibrated oceanic carbon inventory and a realistic representation of eddy kinetic energy – a combination that has, to-date, been precluded by prohibitive computational cost. Results from a simulation with climatological forcing and a sensitivity experiment with increasing winds suggest that the configuration is suited to explore Southern Ocean Carbon uptake dynamics on decadal timescales. Further, the fidelity of simulated bottom water temperatures off and on the Antarctic Shelf suggest that the configuration may be used to provide boundary conditions to ice-sheet models. The configuration is dubbed MOMSO a Modular Ocean Model Southern Ocean configuration.

Heiner Dietze et al.
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Heiner Dietze et al.
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Short summary
We present a new near-global coupled biogeochemical ocean-circulation model configuration. The configuration is cutting-edge in that it features both a relatively equilibrated oceanic carbon inventory and a realistic representation of mesoscale eddies. In this paper we document the model configuration and showcase its potential to tackle research questions such as the Southern Ocean Carbon uptake dynamics on decadal timescales and providing boundary conditions to ice-sheet models.
We present a new near-global coupled biogeochemical ocean-circulation model configuration. The...
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